To download the GMS 5.1 beta software package, check all of the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. If you have previously downloaded GMS 5.1, you can simply download the GMS 5.1 Software Update which consists only of the GMS 5.1 executable.

Download GMS 5.1 Software Package for MS Windows, Program Disk 1
File Size: 5120000 bytes
File Date: Thu Nov 11 15:46:17 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 2
File Size: 5120000 bytes
File Date: Thu Nov 11 15:47:40 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 3
File Size: 5120000 bytes
File Date: Thu Nov 11 15:49:02 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 4
File Size: 5120000 bytes
File Date: Thu Nov 11 15:50:23 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 5
File Size: 5120000 bytes
File Date: Thu Nov 11 15:51:46 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 6
File Size: 5120000 bytes
File Date: Thu Nov 11 15:53:08 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 7
File Size: 5120000 bytes
File Date: Thu Nov 11 15:54:31 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 8
File Size: 5120000 bytes
File Date: Thu Nov 11 15:55:54 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 9
File Size: 5120000 bytes
File Date: Thu Nov 11 15:57:15 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 10
File Size: 5120000 bytes
File Date: Thu Nov 11 15:58:36 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 11
File Size: 5120000 bytes
File Date: Thu Nov 11 16:00:00 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 12
File Size: 5120000 bytes
File Date: Thu Nov 11 16:01:22 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 13
File Size: 5120000 bytes
File Date: Thu Nov 11 16:02:46 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 14
File Size: 5120000 bytes
File Date: Thu Nov 11 16:04:08 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 15
File Size: 5120000 bytes
File Date: Thu Nov 11 16:05:30 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 16
File Size: 5120000 bytes
File Date: Thu Nov 11 16:07:09 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 17
File Size: 5120000 bytes
File Date: Thu Nov 11 16:08:30 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 18
File Size: 5120000 bytes
File Date: Thu Nov 11 16:09:52 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 19
File Size: 5120000 bytes
File Date: Thu Nov 11 16:11:12 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 20
File Size: 5120000 bytes
File Date: Thu Nov 11 16:12:34 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 21
File Size: 5120000 bytes
File Date: Thu Nov 11 16:13:56 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 22
File Size: 5120000 bytes
File Date: Thu Nov 11 16:15:19 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 23
File Size: 5120000 bytes
File Date: Thu Nov 11 16:16:40 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 24
File Size: 5120000 bytes
File Date: Thu Nov 11 16:18:02 2004

Download GMS 5.1 Software Package for MS Windows, Program Disk 25
File Size: 720072 bytes
File Date: Thu Nov 11 16:18:13 2004

To install the GMS 5.1 perform the following steps:

1. Download the GMS 5.1 installation files and save them to a temporary directory (e.g., c:\temp).

2. Run the GMS 5.1 installation program. This is Program Disk 1. In order to run the GMS 5.1 installation program, use Windows Explorer and locate the directory that contains the GMS 5.1 installation executable (e.g., c:\temp) and double-click it.

3. Follow the installation instructions.

4. Delete the GMS 5.1 installation files. Once GMS 5.1 has been successfully installed, the installation files can be safely removed.

5. Run GMS 5.1. As part of the installation procedure a program group called GMS 5.1 will be created. Double-click on the GMS icon to start up the program.

To download the GMS 5.0 software package, check all of the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. If you have previously downloaded GMS 5.0, you can simply download the GMS 5.0 Software Update which consists only of the GMS 5.0 executable.

Download GMS 5.0 Software Package for MS Windows, Program Disk 1
File Size: 5120000 bytes
File Date: Tue Oct 5 02:55:19 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 2
File Size: 5120000 bytes
File Date: Tue Oct 5 02:58:02 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 3
File Size: 5120000 bytes
File Date: Tue Oct 5 03:00:45 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 4
File Size: 5120000 bytes
File Date: Tue Oct 5 03:03:29 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 5
File Size: 5120000 bytes
File Date: Tue Oct 5 03:06:14 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 6
File Size: 5120000 bytes
File Date: Tue Oct 5 03:08:55 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 7
File Size: 5120000 bytes
File Date: Tue Oct 5 03:11:37 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 8
File Size: 5120000 bytes
File Date: Tue Oct 5 03:14:18 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 9
File Size: 5120000 bytes
File Date: Tue Oct 5 03:16:59 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 10
File Size: 5120000 bytes
File Date: Tue Oct 5 03:19:39 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 11
File Size: 5120000 bytes
File Date: Tue Oct 5 03:22:17 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 12
File Size: 5120000 bytes
File Date: Tue Oct 5 03:24:58 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 13
File Size: 5120000 bytes
File Date: Tue Oct 5 03:27:38 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 14
File Size: 5120000 bytes
File Date: Tue Oct 5 03:30:20 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 15
File Size: 5120000 bytes
File Date: Tue Oct 5 03:33:02 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 16
File Size: 5120000 bytes
File Date: Tue Oct 5 03:35:42 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 17
File Size: 5120000 bytes
File Date: Tue Oct 5 03:38:25 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 18
File Size: 5120000 bytes
File Date: Tue Oct 5 03:41:08 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 19
File Size: 5120000 bytes
File Date: Tue Oct 5 03:43:49 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 20
File Size: 5120000 bytes
File Date: Tue Oct 5 03:46:31 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 21
File Size: 5120000 bytes
File Date: Tue Oct 5 03:49:11 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 22
File Size: 5120000 bytes
File Date: Tue Oct 5 03:51:50 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 23
File Size: 5120000 bytes
File Date: Tue Oct 5 03:54:31 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 24
File Size: 5120000 bytes
File Date: Tue Oct 5 03:57:11 2004

Download GMS 5.0 Software Package for MS Windows, Program Disk 25
File Size: 745061 bytes
File Date: Tue Oct 5 03:57:35 2004

To install the GMS 5.0 perform the following steps:

1. Download the GMS 5.0 installation files and save them to a temporary directory (e.g., c:\temp).

2. Run the GMS 5.0 installation program. This is Program Disk 1. In order to run the GMS 5.0 installation program, use Windows Explorer and locate the directory that contains the GMS 5.0 installation executable (e.g., c:\temp) and double-click it.

3. Follow the installation instructions.

4. Delete the GMS 5.0 installation files. Once GMS 5.0 has been successfully installed, the installation files can be safely removed.

5. Run GMS 5.0. As part of the installation procedure a program group called GMS 5.0 will be created. Double-click on the GMS icon to start up the program.

To download the GMS 4.0 software package, check all of the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. If you have previously downloaded GMS 4.0, you can simply download the GMS 4.0 Software Update which consists only of the GMS 4.0 executable.

Download GMS 4.0 Software Package for MS Windows, Program Disk 1
File Size: 5120000 bytes
File Date: Wed Mar 3 23:28:32 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 2
File Size: 5120000 bytes
File Date: Wed Mar 3 23:37:24 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 3
File Size: 5120000 bytes
File Date: Wed Mar 3 23:45:32 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 4
File Size: 5120000 bytes
File Date: Wed Mar 3 23:54:04 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 5
File Size: 5120000 bytes
File Date: Thu Mar 4 00:02:08 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 6
File Size: 5120000 bytes
File Date: Thu Mar 4 00:10:07 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 7
File Size: 5120000 bytes
File Date: Thu Mar 4 00:18:34 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 8
File Size: 5120000 bytes
File Date: Thu Mar 4 00:26:25 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 9
File Size: 5120000 bytes
File Date: Thu Mar 4 00:36:33 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 10
File Size: 5120000 bytes
File Date: Thu Mar 4 00:46:26 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 11
File Size: 5120000 bytes
File Date: Thu Mar 4 00:54:26 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 12
File Size: 5120000 bytes
File Date: Thu Mar 4 01:02:19 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 13
File Size: 5120000 bytes
File Date: Thu Mar 4 01:10:18 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 14
File Size: 5120000 bytes
File Date: Thu Mar 4 01:18:47 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 15
File Size: 5120000 bytes
File Date: Thu Mar 4 01:26:42 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 16
File Size: 5120000 bytes
File Date: Thu Mar 4 01:34:25 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 17
File Size: 5120000 bytes
File Date: Thu Mar 4 01:44:32 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 18
File Size: 5120000 bytes
File Date: Thu Mar 4 01:57:30 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 19
File Size: 5120000 bytes
File Date: Thu Mar 4 02:09:36 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 20
File Size: 5120000 bytes
File Date: Thu Mar 4 02:39:19 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 21
File Size: 5120000 bytes
File Date: Thu Mar 4 02:51:12 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 22
File Size: 5120000 bytes
File Date: Thu Mar 4 02:58:32 2004

Download GMS 4.0 Software Package for MS Windows, Program Disk 23
File Size: 2829030 bytes
File Date: Thu Mar 4 03:02:18 2004

To install the GMS 4.0 perform the following steps:

1. Download the GMS 4.0 installation files and save them to a temporary directory (e.g., c:\temp).

2. Run the GMS 4.0 installation program. This is Program Disk 1. In order to run the GMS 4.0 installation program, use Windows Explorer and locate the directory that contains the GMS 4.0 installation executable (e.g., c:\temp) and double-click it.

3. Follow the installation instructions.

4. Delete the GMS 4.0 installation files. Once GMS 4.0 has been successfully installed, the installation files can be safely removed.

5. Run GMS 4.0. As part of the installation procedure a program group called GMS 4.0 will be created. Double-click on the GMS icon to start up the program.

To download the GMS 3.1 software package, check all of the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. If you have previously downloaded GMS 3.1, you can simply download the GMS 3.1 Software Update which consists only of the GMS 3.1 executable.

Download GMS 3.1 Software Package for MS Windows, Program Disk 1
File Size: 5120000 bytes
File Date: Wed Mar 19 16:21:28 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 2
File Size: 5120000 bytes
File Date: Wed Mar 19 16:24:34 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 3
File Size: 5120000 bytes
File Date: Wed Mar 19 16:27:34 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 4
File Size: 5120000 bytes
File Date: Wed Mar 19 16:30:26 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 5
File Size: 5120000 bytes
File Date: Wed Mar 19 16:33:43 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 6
File Size: 5120000 bytes
File Date: Wed Mar 19 16:37:48 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 7
File Size: 5120000 bytes
File Date: Wed Mar 19 17:38:25 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 8
File Size: 5120000 bytes
File Date: Wed Mar 19 17:42:03 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 9
File Size: 5120000 bytes
File Date: Wed Mar 19 17:45:49 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 10
File Size: 5120000 bytes
File Date: Wed Mar 19 17:49:31 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 11
File Size: 5120000 bytes
File Date: Wed Mar 19 17:52:37 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 12
File Size: 5120000 bytes
File Date: Wed Mar 19 17:56:16 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 13
File Size: 5120000 bytes
File Date: Wed Mar 19 17:59:53 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 14
File Size: 5120000 bytes
File Date: Wed Mar 19 18:03:08 2003

Download GMS 3.1 Software Package for MS Windows, Program Disk 15
File Size: 2223763 bytes
File Date: Wed Mar 19 18:04:29 2003

To install the complete GMS 3.1 software package for MS Windows operating systems, perform the following steps:

1. Download the GMS 3.1 software package installation files and save them to a temporary directory (e.g., c:\temp).

2. Run the GMS 3.1 installation program. This is Program Disk 1. In order to run the GMS 3.1 installation program, use Windows Explorer and locate the directory that contains the GMS 3.1 installation executable (e.g., c:\temp) and double-click it.

3. Follow the installation instructions.

4. Delete the GMS 3.1 installation files. Once GMS 3.1 has been successfully installed, the installation files can be safely removed.

5. Run GMS 3.1. As part of the installation procedure a program group called GMS 3.1 will be created. Double-click on the GMS icon to start up the program.

To download the GMS 3.0 software package, check all of the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. If you have previously downloaded GMS 3.0, you can simply download the GMS 3.0 Software Update which consists only of the GMS 3.0 executable.

Download GMS 3.0 Software Executable for MS Windows
File Size: 6647348 bytes
File Date: Wed Jun 16 19:41:07 2004

Download GMS 3.0 Software Supported Models for MS Windows
File Size: 3423702 bytes
File Date: Sat Apr 5 02:49:54 2003

Download GMS 3.0 Software Tutorials for MS Windows
File Size: 6365784 bytes
File Date: Sat Apr 5 02:53:08 2003

To install the complete GMS 3.0 software package for MS Windows operating systems, perform the following steps:

1. Download the GMS 3.0 software package installation files and save them to a temporary directory (e.g., c:\temp).

2. Run the GMS 3.0 installation program. In order to run the GMS 3.0 installation program, use Windows Explorer and locate the directory that contains the GMS 3.0 installation executable (e.g., c:\temp) and double-click on it.

3. Follow the installation instructions.

4. Delete the GMS 3.0 installation files. Once GMS 3.0 has been successfully installed, the installation files can be safely removed.

5. Run GMS 3.0. As part of the installation procedure a program group called GMS 3.0 will be created. Double-click on the GMS icon to start up the program.

To download the GMS 2.1 software package (including tutorial files), check all of the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. If you have previously downloaded GMS 2.1, you can simply download the GMS 2.1 Software Update which consists only of the GMS 2.1 executable.

Download GMS 2.1 Software Package for MS Windows, Program Disk 1
File Size: 1454080 bytes
File Date: Thu Apr 18 14:25:27 2002

Download GMS 2.1 Software Package for MS Windows, Program Disk 2
File Size: 1454080 bytes
File Date: Thu Apr 18 14:26:16 2002

Download GMS 2.1 Software Package for MS Windows, Program Disk 3
File Size: 1454080 bytes
File Date: Thu Apr 18 14:27:31 2002

Download GMS 2.1 Software Package for MS Windows, Program Disk 4
File Size: 1454080 bytes
File Date: Thu Apr 18 14:28:32 2002

Download GMS 2.1 Software Package for MS Windows, Program Disk 5
File Size: 1454080 bytes
File Date: Thu Apr 18 14:30:00 2002

Download GMS 2.1 Software Package for MS Windows, Program Disk 6
File Size: 1454080 bytes
File Date: Thu Apr 18 14:30:54 2002

Download GMS 2.1 Software Package for MS Windows, Program Disk 7
File Size: 1380052 bytes
File Date: Thu Apr 18 14:32:02 2002

To install the complete GMS 2.1 software package for MS Windows operating systems, perform the following steps:

1. Download the GMS 2.1 software package program disk files and save them to a temporary directory (e.g., c:\temp).

2. Run the GMS installation program. In order to run the GMS 2.1 install program, use Windows Explorer and locate the directory that contains the GMS installation executable (e.g., c:\temp) and double-click on it.

3. Follow the installation instructions.

4. Delete the GMS 2.1 installation files. Once GMS has been successfully installed, the installation files can be safely removed.

5. Run GMS 2.1. As part of the installation procedure a program group called GMS will be created. Double-click on the GMS icon to start up the program.

To download the GMS 3.1 software package (including tutorial files), click on the appropriate link below and save the file to a temporary directory. If you have previously downloaded GMS 3.1, you can simply download the GMS 3.1 Software Update which consists only of the GMS 3.1 executable.

To install the complete GMS software package for X Windows operating systems, download the appropriate GMS 3.1 tar file for your platform.

After you have downloaded the tar file, perform the following steps:

1. Create a GMS directory on your system.

2. Move the GMS 3.1 tar file into the new directory.

3. Uncompress the GMS 3.1 tar file by typing:

   uncompress gmsXXX.tar

4. Untar the GMS 3.1 tar file by typing:

   tar -xvf gmsXXX.tar

   If you unpack the GMS 3.1 tar file successfully, a number of files will be untarred and stored on your file system.

5. Delete the GMS 3.1 tar file (optional).

6. Run GMS 3.1.

To download the GMS version 5.0 software update (which only includes the GMS 5.0 executable), check the box below and the click on the "Download Selected" button. An e-mail will be sent to you with the download link. If you have not previously downloaded GMS 5.0, you must first download the complete GMS version 5.0 software package which consists of the GMS 5.0 executable and tutorial files.

Note: If you are upgrading from an earlier version of GMS to Version 5.0, you need to download the complete installation files. Many other files need to be upgraded for GMS 5.0 to work if you are upgrading to Version 5.0 for the first time. This upgrade file contains only the GMS 5.0 main executable files and can be used only if you have installed the complete Version 5.0. After you download the complete installation files of GMS 5.0, you can install it on top of your earlier version of GMS or you can install the software in an adjacent directory to your earlier version of GMS.

Download GMS 5.0 Update for MS Windows
File Size: 18884954 bytes
File Date: Tue Oct 5 02:52:36 2004

To install the GMS 5.0 update for MS Windows operating systems, perform the following steps:

1. Download the GMS 5.0 update file and save it to a temporary directory (e.g., c:\temp).
2. Double click on the GMS 5.0 update file from Windows Explorer.
3. Follow the instructions to install.

To download the GMS version 4.0 software update (which only includes the GMS 4.0 executable), check the box below and the click on the "Download Selected" button. An e-mail will be sent to you with the download link. If you have not previously downloaded GMS 4.0, you must first download the complete GMS version 4.0 software package which consists of the GMS 4.0 executable and tutorial files.

Note: If you are upgrading from an earlier version of GMS to Version 4.0, you need to download the complete installation files. Many other files need to be upgraded for GMS 4.0 to work if you are upgrading to Version 4.0 for the first time. This upgrade file contains only the GMS 4.0 main executable files and can be used only if you have installed the complete Version 4.0. After you download the complete installation files of GMS 4.0, you can install it on top of your earlier version of GMS or you can install the software in an adjacent directory to your earlier version of GMS.

Download GMS 4.0 Update for MS Windows
File Size: 13802611 bytes
File Date: Wed Mar 3 23:17:23 2004

To install the GMS 4.0 update for MS Windows operating systems, perform the following steps:

1. Download the GMS 4.0 update file and save it to a temporary directory (e.g., c:\temp).
2. Double click on the GMS 4.0 update file from Windows Explorer.
3. Follow the instructions to install.

To download the GMS version 3.1 software update (which only includes the GMS 3.1 executable), check the box below and the click on the "Download Selected" button. An e-mail will be sent to you with the download link. If you have not previously downloaded GMS 3.1, you must first download the complete GMS version 3.1 software package which consists of the GMS 3.1 executable and tutorial files.

Note: If you are upgrading from an earlier version of GMS to Version 3.1, you need to download the complete installation files. Many other files need to be upgraded for GMS 3.1 to work if you are upgrading to Version 3.1 for the first time. This upgrade file contains only the GMS 3.1 main executable files and can be used only if you have installed the complete Version 3.1. After you download the complete installation files of GMS 3.1, you can install it on top of your earlier version of GMS or you can install the software in an adjacent directory to your earlier version of GMS.

Download GMS 3.1 Update for MS Windows
File Size: 10036440 bytes
File Date: Wed Mar 19 17:34:59 2003

To install the GMS 3.1 update for MS Windows operating systems, perform the following steps:

1. Download the GMS 3.1 update file and save it to a temporary directory (e.g., c:\temp).
2. Double click on the GMS 3.1 update file from Windows Explorer.
3. Follow the instructions to install.

To download the GMS version 3.0 software update (which only includes the GMS 3.0 executable), check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. If you have not previously downloaded GMS 3.0, you must first download the complete GMS version 3.0 software package which consists of the GMS 3.0 executable and tutorial files.

Note: If you are upgrading from an earlier version of GMS to Version 3.0, you need to download the complete installation files. Many other files need to be upgraded for GMS 3.0 to work if you are upgrading to Version 3.0 for the first time. This upgrade file contains only the GMS 3.0 main executable files and can be used only if you have installed the complete Version 3.0. After you download the complete installation files of GMS 3.0, you can install it on top of your earlier version of GMS or you can install the software in an adjacent directory to your earlier version of GMS.

Download GMS 3.0 Update for MS Windows
File Size: 6647348 bytes
File Date: Wed Jun 16 19:41:07 2004

To install the GMS 3.0 update for MS Windows operating systems, perform the following steps:

1. Download the GMS 3.0 update file and save it to a temporary directory (e.g., c:\temp).
2. Double click on the GMS 3.0 update file from Windows Explorer.
3. Follow the instructions to install.

To download the GMS version 2.1 software update (which only includes the GMS executable), check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. If you have not previously downloaded GMS, you must first download the complete GMS version 2.1 software package which consists of the GMS executable and tutorial files.

Note: If you are upgrading from GMS Version 2.0 to Version 2.1 or from GMS Beta 2.1 to Version 2.1, you need to download the complete installation files. Many other files need to be upgraded for GMS 2.1 to work if you are upgrading to Version 2.1 for the first time. This upgrade file contains only the GMS main executable files and can be used only if you have installed the complete Version 2.1. After you download the complete installation files of GMS 2.1, you can install it on top of your GMS 2.0 or you can install the software in an adjacent directory to your GMS 2.0.

Download GMS 2.1 Update for MS Windows
File Size: 3113531 bytes
File Date: Sat Apr 5 03:44:08 2003

To install the GMS update for MS Windows operating systems, perform the following steps:

1. Download the GMS update file and save it to a temporary directory (e.g., c:\temp).
2. Double click on the GMS update file from Windows Explorer.
3. Follow the instructions to install.

To download the GMS version 3.1 software update (which only includes the GMS executable), click on the appropriate file below and then save it to a temporary directory. If you have not previously downloaded GMS, you must first download the complete GMS 3.1 software package which consists of the GMS executable and tutorial files.

To install the GMS software update for X Windows operating systems, download the appropriate GMS tar file for your platform and store it in your GMS directory.

After you have downloaded the tar file, perform the following steps:

1. Move the GMS 3.1 update tar file into your GMS 3.1 directory.

2. Uncompress the GMS 3.1 update tar file by typing:

   uncompress gmsXXXupdate.tar

3. Untar the GMS 3.1 update tar file by typing:

   tar -xvf gmsXXXupdate.tar

   If you unpack the GMS 3.1 update tar file successfully, your gms executable will be replaced.

4. Delete the GMS 3.1 update tar file (optional).

5. Run GMS 3.1.

To download the following GMS 5.0 reference manuals, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

Download Adobe Acrobat Reader 4.0 for 32-bit MS Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the MS Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:/temp).

2. Run the Adobe Acrobat Reader setup program. In order to run the setup program, use Windows Explorer and locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:/temp) and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

GMS 5.0 Tutorials - Volume I

File Size: 886822 bytes
File Date: Fri Nov 14 10:51:52 2003

GMS 5.0 Tutorials - Volume I contains tutorials for the following topics:

• Sub-surface Characterization (TINs, Boreholes, and Solids)
• T-PROGS
• 2D & 3D Geostatistics
• Interpolating Layer Elevations
• Solids -> MODFLOW

Each tutorial provides training on a specific component of GMS. Since the GMS interface contains a large number of options and commands, you are strongly encouraged to complete the tutorials before attempting to use GMS on a routine basis.

GMS 5.0 Tutorials - Volume II

File Size: 1067650 bytes
File Date: Fri Nov 14 10:51:22 2003

GMS 5.0 Tutorials - Volume II contains tutorials for the following topics:

• MODFLOW, MODPATH, MT3D, SEAM3D
• Calibration
• Automated Parameter Estimation
• Regional to Local Model Conversion
• Transient Data
• Stochastic Modeling

Each tutorial provides training on a specific component of GMS. Since the GMS interface contains a large number of options and commands, you are strongly encouraged to complete the tutorials before attempting to use GMS on a routine basis.

User’s Documentation for MODFLOW-96 (PDF File)

File Size: 140555 bytes
File Date: Fri Nov 14 10:59:42 2003

This PDF document contains the user’s documentation for MODFLOW-96, an update to the U.S. Geological Survey Modular Finite-Difference Ground-Water Flow Model.

Programmer’s Documentation for MODFLOW-96 (PDF File)

File Size: 426831 bytes
File Date: Fri Nov 14 10:59:56 2003

This PDF document contains the programmer’s documentation for MODFLOW-96, an update to the U.S. Geological Survey Modular Finite-Difference Ground-Water Flow Model.

A Modular Three-Dimensional Finite-Difference Ground Water Flow Model (PDF File)

File Size: 9385088 bytes
File Date: Fri Nov 14 12:20:50 2003

This PDF document contains information about modular three-dimensional finite-difference ground water flow model.

Download Finite-Difference Ground Water Flow Model Documentation (PDF File)

File Size: 16851634 bytes
File Date: Fri Nov 14 12:31:46 2003

This PDF document contains the following articles:

• Preconditioned Conjugate-Gradient 2 (PCG2)
• A Method of Converting No-Flow Cells to Variable-Head Cells for the U.S. Geological Survey Modular Finite-Difference Ground-Water Flow Model (BCF2)
• Finite-Difference Interblock Transmissivity for Unconfined Aquifers and for Aquirfers Having Smoothly Varying Transmissivity (BCF4)
• Documentation of a Computer Program to Stimulate Stream-Aquifer Relations Using a Modular, Finite-Difference, Ground-Water Flow Model (STR1)
• Documentation of a Computer Program to Stimulate Aquifer-System Compaction Using the Modular Finite-Difference Ground-Water Flow Model (CHD1)
• Documentation of a Computer Program to Stimulate Horizontal-Flow Barriers Using the U.S. Geological Survey's Modular Three-Dimensional Finite-Difference Ground-Water Flow Model (HFB1)

MODFLOW 2000 - User Guide to Modularization Concepts and the Groundwater Flow Process

File Size: 671065 bytes
File Date: Fri Jan 3 11:43:21 2003

This PDF technical document describes a MODFLOW 2000 which is designed to accommodate the solution of equations in addition to the ground-water flow equation. It contains an overview of the old and added design concepts, documents one new package, and contains input instructions for using the model to solve the ground-water flow equation.

MODFLOW 2000 - Methods and Guidelines for Effective Model Calibration

File Size: 518307 bytes
File Date: Fri Jan 3 11:42:40 2003

This PDF technical document describes methods and guidelines for model calibration using inverse modeling. The inverse modeling and statistical methods discussed are broadly applicable, but are presented as implemented in the computer programs UCODE and MODFLOWP. UCODE and MODFLOWP perform inverse modeling by calculating parameter values that minimize a weighted least-squares objective function using nonlinear regression. Minimization is accomplished using a modified Gauss-Newton method, and prior or direct information on estimated parameters can be included in the regression. Inverse modeling in many fields is plagued by problems of instability and nonuniqueness, and obtaining useful results depends on:

1. defining a tractable inverse problem using simplifications appropriate to the system under investigation and
2. wise use of statistics generated using calculated sensitivities and the match between observed and simulated values, and associated graphical analyses

Fourteen guidelines presented in this work suggest ways of constructing and calibrating models of complex systems such that the resulting model is as accurate and useful as possible.

MODFLOW 2000 - User Guide to Observation, Sensitivity, Parameter-Estimation Processes, and Three Post-Processing Programs

File Size: 591726 bytes
File Date: Fri Jan 3 11:48:08 2003

This PDF technical document describes the Observation, Sensitivity, and Parameter-Estimation Processes of the groundwater modeling computer program MODFLOW 2000. The Observation Process generates model-calculated values for comparison with measured, or observed, quantities. A variety of statistics is calculated to quantify this comparison, including a weighted least-squares objective function. In addition, a number of files are produced that can be used to compare the values graphically. The Sensitivity Process calculates the sensitivity of hydraulic heads throughout the model with respect to specified parameters using the accurate sensitivity-equation method. These are called grid sensitivities. If the Observation Process is active, it uses the grid sensitivities to calculate sensitivities for the simulated values associated with the observations. These are called observation sensitivities. Observation sensitivities are used to calculate a number of statistics that can be used to diagnose inadequate data, to identify parameters that probably cannot be estimated by regression using the available observations, and to evaluate the utility of proposed new data.

MODFLOW 2000 - Documentation of the Hydrogeologic-Unit Flow Package

File Size: 555149 bytes
File Date: Fri Jan 3 11:43:50 2003

This PDF technical document describes the Hydrogeologic-Unit Flow (HUF) Package for the groundwater modeling computer program MODFLOW 2000. The HUF Package is an alternative internal flow package that allows the vertical geometry of the system hydrogeology to be defined explicitly within the model using hydrogeologic units that can be different than the definition of the model layers. The HUF Package works with all the processes of MODFLOW 2000. For the Groundwater Flow Process, the HUF Package calculates effective hydraulic properties for the model layers based on the hydraulic properties of the hydrogeologic units, which are defined by the user using parameters. The hydraulic properties are used to calculate the conductance coefficients and other terms needed to solve the groundwater flow equation. The sensitivity of the model to the parameters defined within the HUF Package input file can be calculated using the Sensitivity Process, using observations defined with the Observation Process. Optimal values of the parameters can be estimated by using the Parameter-Estimation Process. The HUF Package is nearly identical to the Layer-Property Flow (LPF) Package, the major difference being the definition of the vertical geometry of the system hydrogeology. Use of the HUF Package is illustrated in two test cases, which also serve to verify the performance of the package by showing that the Parameter-Estimation Process produces the true parameter values when exact observations are used.

MODFLOW 2000 - User Guide to the Link - AMG (LMG) Package for Solving Matrix Equations Using an Algebraic Multigrid Solver

File Size: 806362 bytes
File Date: Fri Jan 3 11:44:34 2003

This PDF technical document describes the Link-AMG (LMG) Package that links MODFLOW 2000 to an algebraic multigrid (AMG) solver for matrix equations. The LMG Package has some distinct advantages over other solvers available with MODFLOW 2000 for problems with large grids (more than about 40,000 cells) and (or) a highly variable hydraulic-conductivity field. Experience has indicated that, in such problems, execution times using the AMG solver are typically about 2 to 25 times faster than execution times using MODFLOW’s PCG2 Package with the modified incomplete Cholesky preconditioner. The drawback to the AMG method used in LMG is the relatively large amount of computer memory required. In problems simulated for this work, the AMG solver used typically required 3 to 8 times more memory than PCG2. For one 465,600-node problem, for example, 151 megabytes (MB) of memory were required when the LMG package was used, whereas PCG2 required 47 MB of memory. The execution time, however, decreased from 942 seconds to 50 seconds, so there is a clear trade-off between execution time and memory requirements. On modern computers, such memory requirements are becoming increasingly attainable.

MODFLOW 2000 - User Guide to the LMT6 Package, The Linkage with MT3DMS for Multi-Species Mass Transport Modeling

File Size: 3711908 bytes
File Date: Fri Jan 3 11:47:38 2003

MODFLOW 2000 is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium using a finite-difference method. MT3DMS is a computer program for modeling multi-species solute transport in three-dimensional groundwater systems using multiple solution techniques, including the finite-difference method, the method of characteristics (MOC), and the total-variation-diminishing (TVD) method. This PDF technical document describes a new version of the Link-MT3DMS Package, which enables MODFLOW 2000 to produce the information needed by MT3DMS, and also discusses new visualization software for MT3DMS. Unlike the Link-MT3D Package that coordinated previous versions of MODFLOW and MT3D, the new Link-MT3DMS Package requires an input file that, among other things, provides enhanced support for additional MODFLOW sink/source packages and allows list-directed format for the flow model produced flow-transport link file.

This PDF technical document contains four parts:

1. documentation of the Link-MT3DMS Package Version 6 for MODFLOW 2000
2. discussion of several issues related to simulation setup and input data preparation for running MT3DMS with MODFLOW 2000
3. description of two test example problems, with comparison to results obtained using another MODFLOW-based transport program
4. overview of post-simulation visualization and animation using the U.S. Geological Survey’s Model Viewer.

User's Guide for MODPATH/MODPATH-PLOT, Version 3

File Size: 817156 bytes
File Date: Fri Jan 3 12:03:00 2003

This PDF technical document describes MODPATH/MODPATH-PLOT. MODPATH is intended for general use and may have to be modified by the user for specific applications. The methods used by MODPATH are based on specific assumptions that result in limitations that must be thoroughly understood to obtain meaningful results.

MODPATH is a particle tracking post-processing package that was developed to compute three dimensional flow paths using output from steady-state or transient groundwater flow simulations by MODFLOW. The particle tracking package consists of two FORTRAN computer codes:

1. MODPATH, which calculates particle paths
2. MODPATH-PLOT, which displays results graphically

Download Documentation and User's Guide for MT3DMS (PDF File)

File Size: 2250350 bytes
File Date: Fri Jan 3 12:05:21 2003

This PDF file contains documentation and a user's guide for MT3DMS: a modular three-dimensional multispecies transport model for simulation of advection, dispersion, and chemical reactions of contaminants in groundwater systems.

Download RT3D User Manual (PDF File)

File Size: 289991 bytes
File Date: Fri Jan 3 12:24:45 2003

This report describes the mathematical details of the RT3D computer model and its input/output data structure.

Download RT3D Version 2.5 Update Document (PDF File)

File Size: 292688 bytes
File Date: Fri Nov 14 10:52:02 2003

This report describes what's new in RT3D version 2.5.

SEAM3D v3.0 - Documentation and User's Guide

File Size: 931996 bytes
File Date: Fri Jan 3 13:01:26 2003

This PDF technical document provides documentation on SEAM3D. The focus of this document is two new modules to the SEAM3D code: the Chlorinated Ethene, and Cometabolism Packages. Included in this document are model and code verification exercises for the new modules and an application of the code to a field problem.

Download FEMWATER Documentation, Version 3.0 (PDF File)

File Size: 514010 bytes
File Date: Fri Jan 3 12:59:49 2003

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

UTCHEM 9.0 User's Guide

File Size: 302803 bytes
File Date: Fri Jan 3 13:05:02 2003

This PDF technical document describes UTCHEM, a three-dimensional chemical flooding simulator. The solution scheme for UTCHEM is analogous to IMPES, where pressure is solved for implicitly, but concentrations rather than saturations are then solved for explicitly. Phase saturations and concentrations are then solved in a flash routine. An energy balance equation is solved explicitly for reservoir temperature. The energy balance equation includes heat flow between the reservoir and the over- and under-burden rocks.

UTCHEM 9.0 Technical Documentation

File Size: 2864997 bytes
File Date: Fri Jan 3 13:04:43 2003

This PDF technical document describes UTCHEM, a 3-D, multicomponent, multiphase, compositional model of chemical flooding processes which accounts for complex phase behavior, chemical and physical transformations and heterogeneous porous media properties, and uses advanced concepts in high-order numerical accuracy and dispersion control and vector and parallel processing.

Download SEEP2D Primer (PDF File)

File Size: 108023 bytes
File Date: Fri Jan 3 13:00:56 2003

This document is a primer for the GMS SEEP2D numerical modeling system. It should be read completely before any modeling is attempted with SEEP2D.

Download PEST Documentation (PDF File)

File Size: 1080433 bytes
File Date: Fri Jan 3 13:00:52 2003

This documentation describes the use of PEST, parameter optimizer for determining MODFLOW model values with use in GMS.

Download UCODE Documentation (PDF File)

File Size: 328857 bytes
File Date: Fri Jan 3 13:02:20 2003

This report documents the computer program UCODE, which performs inverse modeling, posed as a parameter estimation problem, using nonlinear regression.

T-PROGS: Transition Probability Geostatistical Software

File Size: 1092559 bytes
File Date: Fri Jan 3 13:02:10 2003

Transition Probability Geostatistical Software (T-PROGS) is a set of FORTRAN computer programs that implements a transition probability/Markov approach to geostatistical analysis and simulation of spatial distributions of categorical variables (e.g., geologic units, facies). Implementation of T-PROGS involves three main steps:

• calculation of transition probability measurements
• modeling spatial variability with Markov chains
• conditional simulation.

These steps are accomplished by the following programs:

• GAMEAS computes bivariate statistics (e.g., transition probability, indicator cross-variogram, etc.).
• MCMOD develops one- and three-dimensional Markov chain models of spatial variability.
• TSIM generates three-dimensional, cross-correlated conditional simulations.

The transition probability/Markov approach was developed to facilitate incorporation of geologic interpretation and improve consideration for spatial cross-correlations in the development of geostatistical models.

To download the following GMS 4.0 reference manuals, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

Download Adobe Acrobat Reader 4.0 for 32-bit MS Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the MS Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:/temp).

2. Run the Adobe Acrobat Reader setup program. In order to run the setup program, use Windows Explorer and locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:/temp) and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

GMS Tutorials - Volume I

File Size: 1447665 bytes
File Date: Fri Jan 3 12:26:06 2003

GMS Tutorials - Volume I contains tutorials for the following topics:

• Sub-surface Characterization (TINs, Boreholes, and Solids)
• T-PROGS
• 2D & 3D Geostatistics
• Solids -> MODFLOW

Each tutorial provides training on a specific component of GMS. Since the GMS interface contains a large number of options and commands, you are strongly encouraged to complete the tutorials before attempting to use GMS on a routine basis.

GMS Tutorials - Volume II

File Size: 1155595 bytes
File Date: Fri Jan 3 12:27:09 2003

GMS Tutorials - Volume II contains tutorials for the following topics:

• MODFLOW, MODPATH, MT3D, SEAM3D
• Interpolating Layer Elevations
• Transient Data
• Regional to Local Model Conversion
• Parameter Estimation
• Stochastic Modeling

Each tutorial provides training on a specific component of GMS. Since the GMS interface contains a large number of options and commands, you are strongly encouraged to complete the tutorials before attempting to use GMS on a routine basis.

GMS Tutorials - Volume III

File Size: 990312 bytes
File Date: Fri Jan 3 12:28:01 2003

GMS Tutorials - Volume III contains tutorials for the following topics:

• FEMWATER
• SEEP2D
• UTCHEM

Each tutorial provides training on a specific component of GMS. Since the GMS interface contains a large number of options and commands, you are strongly encouraged to complete the tutorials before attempting to use GMS on a routine basis.

GMS Tutorials - Volume VI

File Size: 620342 bytes
File Date: Fri Jan 3 12:28:41 2003

GMS Tutorials - Volume VI contains tutorials for the following topics:

• RT3D
• ART3D

Each tutorial provides training on a specific component of GMS. Since the GMS interface contains a large number of options and commands, you are strongly encouraged to complete the tutorials before attempting to use GMS on a routine basis.

GMS File Formats

File Size: 320991 bytes
File Date: Fri Jan 3 13:00:13 2003

This PDF technical document contains the file formats for some of the files used by GMS. Files that are used by analysis codes such as FEMWATER and MODFLOW are not described in this document since they are described in the documentation for the codes. All tabular data including scatter point, observation, well, pumping, and borehole data can be imported as tabular text files with the Text Import Wizard.

Download MODFLOW version 88 Reference Manual (PDF File)

File Size: 9385088 bytes
File Date: Fri Jan 3 12:02:20 2003

The original MODFLOW documentation "A Modular Three-Dimensional Finite-Difference groundwater Flow Model" by McDonald and Harbaugh.

Download PCG2 Package Documentation (PDF File)

File Size: 16851634 bytes
File Date: Fri Jan 3 12:24:17 2003

Author: Mary C. Hill

This report documents PCG2: a numerical code to be used with the U.S. Geological Survey modular three-dimensional, finite-difference, ground-water flow model. PCG2 uses the preconditioned conjugate-gradient method to solve the equations produced by the model for hydraulic head. Linear or nonlinear flow conditions may be simulated.

MODFLOW 2000 - User Guide to Modularization Concepts and the Groundwater Flow Process

File Size: 671065 bytes
File Date: Fri Jan 3 11:43:21 2003

This PDF technical document describes a MODFLOW 2000 which is designed to accommodate the solution of equations in addition to the ground-water flow equation. It contains an overview of the old and added design concepts, documents one new package, and contains input instructions for using the model to solve the ground-water flow equation.

MODFLOW 2000 - Methods and Guidelines for Effective Model Calibration

File Size: 518307 bytes
File Date: Fri Jan 3 11:42:40 2003

This PDF technical document describes methods and guidelines for model calibration using inverse modeling. The inverse modeling and statistical methods discussed are broadly applicable, but are presented as implemented in the computer programs UCODE and MODFLOWP. UCODE and MODFLOWP perform inverse modeling by calculating parameter values that minimize a weighted least-squares objective function using nonlinear regression. Minimization is accomplished using a modified Gauss-Newton method, and prior or direct information on estimated parameters can be included in the regression. Inverse modeling in many fields is plagued by problems of instability and nonuniqueness, and obtaining useful results depends on:

1. defining a tractable inverse problem using simplifications appropriate to the system under investigation and
2. wise use of statistics generated using calculated sensitivities and the match between observed and simulated values, and associated graphical analyses

Fourteen guidelines presented in this work suggest ways of constructing and calibrating models of complex systems such that the resulting model is as accurate and useful as possible.

MODFLOW 2000 - User Guide to Observation, Sensitivity, Parameter-Estimation Processes, and Three Post-Processing Programs

File Size: 591726 bytes
File Date: Fri Jan 3 11:48:08 2003

This PDF technical document describes the Observation, Sensitivity, and Parameter-Estimation Processes of the groundwater modeling computer program MODFLOW 2000. The Observation Process generates model-calculated values for comparison with measured, or observed, quantities. A variety of statistics is calculated to quantify this comparison, including a weighted least-squares objective function. In addition, a number of files are produced that can be used to compare the values graphically. The Sensitivity Process calculates the sensitivity of hydraulic heads throughout the model with respect to specified parameters using the accurate sensitivity-equation method. These are called grid sensitivities. If the Observation Process is active, it uses the grid sensitivities to calculate sensitivities for the simulated values associated with the observations. These are called observation sensitivities. Observation sensitivities are used to calculate a number of statistics that can be used to diagnose inadequate data, to identify parameters that probably cannot be estimated by regression using the available observations, and to evaluate the utility of proposed new data.

MODFLOW 2000 - Documentation of the Hydrogeologic-Unit Flow Package

File Size: 555149 bytes
File Date: Fri Jan 3 11:43:50 2003

This PDF technical document describes the Hydrogeologic-Unit Flow (HUF) Package for the groundwater modeling computer program MODFLOW 2000. The HUF Package is an alternative internal flow package that allows the vertical geometry of the system hydrogeology to be defined explicitly within the model using hydrogeologic units that can be different than the definition of the model layers. The HUF Package works with all the processes of MODFLOW 2000. For the Groundwater Flow Process, the HUF Package calculates effective hydraulic properties for the model layers based on the hydraulic properties of the hydrogeologic units, which are defined by the user using parameters. The hydraulic properties are used to calculate the conductance coefficients and other terms needed to solve the groundwater flow equation. The sensitivity of the model to the parameters defined within the HUF Package input file can be calculated using the Sensitivity Process, using observations defined with the Observation Process. Optimal values of the parameters can be estimated by using the Parameter-Estimation Process. The HUF Package is nearly identical to the Layer-Property Flow (LPF) Package, the major difference being the definition of the vertical geometry of the system hydrogeology. Use of the HUF Package is illustrated in two test cases, which also serve to verify the performance of the package by showing that the Parameter-Estimation Process produces the true parameter values when exact observations are used.

MODFLOW 2000 - User Guide to the Link - AMG (LMG) Package for Solving Matrix Equations Using an Algebraic Multigrid Solver

File Size: 806362 bytes
File Date: Fri Jan 3 11:44:34 2003

This PDF technical document describes the Link-AMG (LMG) Package that links MODFLOW 2000 to an algebraic multigrid (AMG) solver for matrix equations. The LMG Package has some distinct advantages over other solvers available with MODFLOW 2000 for problems with large grids (more than about 40,000 cells) and (or) a highly variable hydraulic-conductivity field. Experience has indicated that, in such problems, execution times using the AMG solver are typically about 2 to 25 times faster than execution times using MODFLOW’s PCG2 Package with the modified incomplete Cholesky preconditioner. The drawback to the AMG method used in LMG is the relatively large amount of computer memory required. In problems simulated for this work, the AMG solver used typically required 3 to 8 times more memory than PCG2. For one 465,600-node problem, for example, 151 megabytes (MB) of memory were required when the LMG package was used, whereas PCG2 required 47 MB of memory. The execution time, however, decreased from 942 seconds to 50 seconds, so there is a clear trade-off between execution time and memory requirements. On modern computers, such memory requirements are becoming increasingly attainable.

MODFLOW 2000 - User Guide to the LMT6 Package, The Linkage with MT3DMS for Multi-Species Mass Transport Modeling

File Size: 3711908 bytes
File Date: Fri Jan 3 11:47:38 2003

MODFLOW 2000 is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium using a finite-difference method. MT3DMS is a computer program for modeling multi-species solute transport in three-dimensional groundwater systems using multiple solution techniques, including the finite-difference method, the method of characteristics (MOC), and the total-variation-diminishing (TVD) method. This PDF technical document describes a new version of the Link-MT3DMS Package, which enables MODFLOW 2000 to produce the information needed by MT3DMS, and also discusses new visualization software for MT3DMS. Unlike the Link-MT3D Package that coordinated previous versions of MODFLOW and MT3D, the new Link-MT3DMS Package requires an input file that, among other things, provides enhanced support for additional MODFLOW sink/source packages and allows list-directed format for the flow model produced flow-transport link file.

This PDF technical document contains four parts:

1. documentation of the Link-MT3DMS Package Version 6 for MODFLOW 2000
2. discussion of several issues related to simulation setup and input data preparation for running MT3DMS with MODFLOW 2000
3. description of two test example problems, with comparison to results obtained using another MODFLOW-based transport program
4. overview of post-simulation visualization and animation using the U.S. Geological Survey’s Model Viewer.

User's Guide for MODPATH/MODPATH-PLOT, Version 3

File Size: 817156 bytes
File Date: Fri Jan 3 12:03:00 2003

This PDF technical document describes MODPATH/MODPATH-PLOT. MODPATH is intended for general use and may have to be modified by the user for specific applications. The methods used by MODPATH are based on specific assumptions that result in limitations that must be thoroughly understood to obtain meaningful results.

MODPATH is a particle tracking post-processing package that was developed to compute three dimensional flow paths using output from steady-state or transient groundwater flow simulations by MODFLOW. The particle tracking package consists of two FORTRAN computer codes:

1. MODPATH, which calculates particle paths
2. MODPATH-PLOT, which displays results graphically

Download Documentation and User's Guide for MT3DMS (PDF File)

File Size: 2250350 bytes
File Date: Fri Jan 3 12:05:21 2003

This PDF file contains documentation and a user's guide for MT3DMS: a modular three-dimensional multispecies transport model for simulation of advection, dispersion, and chemical reactions of contaminants in groundwater systems.

Download RT3D User Manual (PDF File)

File Size: 289991 bytes
File Date: Fri Jan 3 12:24:45 2003

This report describes the mathematical details of the RT3D computer model and its input/output data structure.

Download RT3D Version 2 Update Document (PDF File)

File Size: 33897 bytes
File Date: Fri Jan 3 12:24:55 2003

Since RT3D version 2 is based on the MT3D-MS code, the input data structure of BTN, ADV, and DSP files are exactly identical to MT3D-MS inputs as described in Zheng and Wang (1998). The input data for SSM is package is also identical to MT3D-MS SSM package, except in RT3Dv2-SSM package an additional boundary condition designated as the decaying constant source boundary condition is supported. The input data structure for RCT file is almost identical to RT3Dv1-RCT data structure, except in version-2 three new solver options are included and also the sorption parameters can be specified on a cell-by-cell basis. The differences between MT3M-MS SSM and RT3Dv2-SSM input files, and the differences between RT3Dv1-RCT and RT3Dv2-RCT input files are described in this document.

RT3D - General Solution to Multi-Species Transport Equations Coupled with a First-Order Reaction Network

File Size: 203867 bytes
File Date: Fri Jan 3 11:42:10 2003

This PDF technical document presents a generalized solution methodology for deriving analytical solutions to multi-species transport equations coupled with multi-parent, serial, parallel, converging, diverging, and/or reversible first-order reactions. The method is flexible for solving one-, two-, or three-dimensional advection-dispersion equations that are coupled with a set of first-order reactions. However, a major limitation is that the method cannot be used for solving multi-species transport equations with different retardation factors. Mathematical steps are provided to illustrate how the general solution method can be derived using linear transformation principles, and to show why the method would fail when the retardation factors are different. The results of the presented solution scheme for a test problem compare well against the numerical solution computed using the RT3D transport code. The proposed methodology is particularly useful for developing simple analytical models that can be used to perform screening simulations and be used to test complex multi-species transport codes.

SEAM3D v3.0 - Documentation and User's Guide

File Size: 931996 bytes
File Date: Fri Jan 3 13:01:26 2003

This PDF technical document provides documentation on SEAM3D. The focus of this document is two new modules to the SEAM3D code: the Chlorinated Ethene, and Cometabolism Packages. Included in this document are model and code verification exercises for the new modules and an application of the code to a field problem.

Download FEMWATER Documentation, Version 3.0 (PDF File)

File Size: 514010 bytes
File Date: Fri Jan 3 12:59:49 2003

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

UTCHEM 9.0 User's Guide

File Size: 302803 bytes
File Date: Fri Jan 3 13:05:02 2003

This PDF technical document describes UTCHEM, a three-dimensional chemical flooding simulator. The solution scheme for UTCHEM is analogous to IMPES, where pressure is solved for implicitly, but concentrations rather than saturations are then solved for explicitly. Phase saturations and concentrations are then solved in a flash routine. An energy balance equation is solved explicitly for reservoir temperature. The energy balance equation includes heat flow between the reservoir and the over- and under-burden rocks.

UTCHEM 9.0 Technical Documentation

File Size: 2864997 bytes
File Date: Fri Jan 3 13:04:43 2003

This PDF technical document describes UTCHEM, a 3-D, multicomponent, multiphase, compositional model of chemical flooding processes which accounts for complex phase behavior, chemical and physical transformations and heterogeneous porous media properties, and uses advanced concepts in high-order numerical accuracy and dispersion control and vector and parallel processing.

Download SEEP2D Primer (PDF File)

File Size: 108023 bytes
File Date: Fri Jan 3 13:00:56 2003

This document is a primer for the GMS SEEP2D numerical modeling system. It should be read completely before any modeling is attempted with SEEP2D.

Download PEST Documentation (PDF File)

File Size: 1080433 bytes
File Date: Fri Jan 3 13:00:52 2003

This documentation describes the use of PEST, parameter optimizer for determining MODFLOW model values with use in GMS.

Download UCODE Documentation (PDF File)

File Size: 328857 bytes
File Date: Fri Jan 3 13:02:20 2003

This report documents the computer program UCODE, which performs inverse modeling, posed as a parameter estimation problem, using nonlinear regression.

T-PROGS: Transition Probability Geostatistical Software

File Size: 1092559 bytes
File Date: Fri Jan 3 13:02:10 2003

Transition Probability Geostatistical Software (T-PROGS) is a set of FORTRAN computer programs that implements a transition probability/Markov approach to geostatistical analysis and simulation of spatial distributions of categorical variables (e.g., geologic units, facies). Implementation of T-PROGS involves three main steps:

• calculation of transition probability measurements
• modeling spatial variability with Markov chains
• conditional simulation.

These steps are accomplished by the following programs:

• GAMEAS computes bivariate statistics (e.g., transition probability, indicator cross-variogram, etc.).
• MCMOD develops one- and three-dimensional Markov chain models of spatial variability.
• TSIM generates three-dimensional, cross-correlated conditional simulations.

The transition probability/Markov approach was developed to facilitate incorporation of geologic interpretation and improve consideration for spatial cross-correlations in the development of geostatistical models.

To download the following GMS 3.1 reference manuals, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

Download Adobe Acrobat Reader 4.0 for 32-bit MS Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the MS Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:\temp).

2. Run the Adobe Acrobat Reader setup program. In order to run the setup program, use Windows Explorer and locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:\temp) and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

Download GMS 3.1 Overview Guide (PDF File)

File Size: 3124090 bytes
File Date: Fri Oct 20 01:30:41 2000

The GMS Overview Guide is a detailed overview of GMS version 3.1. It provides a description of the major features found in GMS.

Download GMS 3.1 Tutorials (PDF File)

File Size: 1865784 bytes
File Date: Wed Oct 18 17:29:44 2000

A complete set of GMS tutorials is provided with this document.

Download MODFLOW version 88 Reference Manual (PDF File)

File Size: 9385088 bytes
File Date: Fri Jan 3 12:02:20 2003

The original MODFLOW documentation "A Modular Three-Dimensional Finite-Difference groundwater Flow Model" by McDonald and Harbaugh.

Download MODFLOW version 96 Reference Manual (PDF File)

File Size: 140555 bytes
File Date: Mon Jun 26 18:04:53 2000

USGS Open-File Report 96-485
Authors: Arlen W. Harbaugh and Michael G. McDonald

A number of changes have been made to the U.S. Geological Survey modular finite-difference groundwater flow model, which is commonly known as MODFLOW. Existing MODFLOW input files will work with the revised model. Also, the basic structure and computational methods of the model have been maintained. Those familiar with the original model should have no difficulty adapting to the revised model.

Download MODFLOW version 96 Programmer Documentation (PDF File)

File Size: 426831 bytes
File Date: Fri Apr 20 02:03:23 2001

USGS Open-File Report 96-486
Authors: Arlen W. Harbaugh and Michael G. McDonald

A number of changes have been made to the U.S. Geological Survey modular finite-difference groundwater flow model, which is commonly known as MODFLOW. This report provides programmer's documentation for the revised code, which is called MODFLOW-96 to distinguish it from other versions of MODFLOW. A complete listing of the MODFLOW-96 code is provided. The listings are organized by package and by module within a package.

Download USGS MODFLOW Instructional Problems Manual (PDF File)

File Size: 5482152 bytes
File Date: Thu Apr 18 16:34:47 2002

This manual is intended to provide a curriculum that allows the user to have hand-on experience with the practical application of models using GMS.

Twenty documented problems, complete with problem statements, input data sets, and discussion of results are presented. The problems are designed to cover modeling principles, specifics of input/output options available to the modeler, rules of thumb, and common modeling mistakes.

Download USGS MODFLOW Model Instructional Problems (ZIP File)
File Size: 3997414 bytes
File Date: Tue Jun 2 19:41:44 1998

This zip file contains twenty instructional problems described in the USGS MODFLOW Instructional Problems Manual (PDF File). These files are setup for running using GMS.

Download MODPATH Documentation (PDF File)

File Size: 817156 bytes
File Date: Fri Jan 3 12:03:00 2003

This PDF file contains the complete documentation for the MODPATH groundwater model. The MODPATH Reference Manual includes discussion about particle tracking methodology, time concepts, flow system files, output modes, and example input and output files.

Download MT3D-MS User Manual (PDF File)

File Size: 1822461 bytes
File Date: Fri Aug 4 05:46:23 2000

This manual describes the next-generation of the modular three-dimensional transport model, MT3D-MS, with significantly expanded capabilities.

Download RT3D Tutorials for GMS User (PDF File)

File Size: 246021 bytes
File Date: Thu Feb 10 03:25:59 2000

This report presents a set of tutorial problems that are designed to illustrate how RT3D simulations can be performed within the Department of Defense Groundwater Modeling System (GMS). GMS serves as a pre- and post-processing interface for RT3D. GMS can be used to define all the input files needed by RT3D code, and later the code can be launched from within GMS or run as a separate application. Once the RT3D simulation is completed, the solution can be imported into GMS for graphical post-processing.

Download RT3D User Manual (PDF File)

File Size: 289991 bytes
File Date: Fri Jan 3 12:24:45 2003

This report describes the mathematical details of the RT3D computer model and its input/output data structure.

Download RT3D Version 2 Update Document (PDF File)

File Size: 33897 bytes
File Date: Fri Jan 3 12:24:55 2003

Since RT3D version 2 is based on the MT3D-MS code, the input data structure of BTN, ADV, and DSP files are exactly identical to MT3D-MS inputs as described in Zheng and Wang (1998). The input data for SSM is package is also identical to MT3D-MS SSM package, except in RT3Dv2-SSM package an additional boundary condition designated as the decaying constant source boundary condition is supported. The input data structure for RCT file is almost identical to RT3Dv1-RCT data structure, except in version-2 three new solver options are included and also the sorption parameters can be specified on a cell-by-cell basis. The differences between MT3M-MS SSM and RT3Dv2-SSM input files, and the differences between RT3Dv1-RCT and RT3Dv2-RCT input files are described in this document.

Download SEAM3D Technical Report (PDF File)

File Size: 931996 bytes
File Date: Fri Jan 3 13:01:26 2003

This report describes the development, verification, and application of SEAM3D (sequential electron acceptor model, 3 dimensional), a numerical model for subsurface solute transport with aerobic and sequential anaerobic biodegradation.

Download SEEP2D Primer (PDF File)

File Size: 108023 bytes
File Date: Fri Jan 3 13:00:56 2003

This document is a primer for the GMS SEEP2D numerical modeling system. It should be read completely before any modeling is attempted with SEEP2D.

Download SEEP2D Tutorials (PDF File)

File Size: 269274 bytes
File Date: Tue May 29 13:33:46 2001

The complete set of documentation for the SEEP2D tutorials.

Download FEMWATER Documentation, Version 3.0 (PDF File)

File Size: 514010 bytes
File Date: Fri Jan 3 12:59:49 2003

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

Download FEMWATER Documentation, Version 2.0 (PDF File)

File Size: 449812 bytes
File Date: Thu Feb 10 03:21:12 2000

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

Download FEMWATER Salt Water Intrusion Tutorial and Data (ZIP File)
File Size: 1064154 bytes
File Date: Thu Oct 4 19:51:26 2001

This ZIP file contains the PDF file for tutorial on the application of FEMWATER to salt water intrusion problems and data needed to execute the exercises. FEMWATER is a 3D finite element, saturated/unsaturated, density driven, flow and transport model. This tutorial describes the steps involved in performing a salt water intrusion model using FEMWATER.

Download UTCHEM 9.0 Technical Documentation (PDF File)

File Size: 2864997 bytes
File Date: Wed Oct 18 17:27:19 2000

Pioneering research being conducted at The University of Texas at Austin is providing a scientific and engineering basis for modeling and enhanced recovery of oil and the enhanced remediation of aquifers through the development and application of compositional simulators. This research has resulted in the development and application of UTCHEM, a 3-D, multicomponent, multiphase, compositional model of chemical flooding processes which accounts for complex phase behavior, chemical and physical transformations and heterogeneous porous media properties, and uses advanced concepts in high-order numerical accuracy and dispersion control and vector and parallel processing.

Download UTCHEM 9.0 User Guide (PDF File)

File Size: 302803 bytes
File Date: Wed Oct 18 17:27:28 2000

This document contains the complete User Guide to UTCHEM which is a three-dimensional chemical flooding simulator.

Download NUFT Flow and Transport Code Reference Manual, Version 2.0 (PDF File)

File Size: 374089 bytes
File Date: Thu Jan 10 17:06:20 2002

This documentation is a reference manual for the NUFT flow and transport code.

Download UCODE Documentation (PDF File)

File Size: 328857 bytes
File Date: Fri Jan 3 13:02:20 2003

This report documents the computer program UCODE, which performs inverse modeling, posed as a parameter estimation problem, using nonlinear regression.

Download PEST Documentation (PDF File)

File Size: 1080433 bytes
File Date: Fri Jan 3 13:00:52 2003

This documentation describes the use of PEST, parameter optimizer for determining MODFLOW model values with use in GMS.

To download the following GMS 3.0 reference manuals, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

Download Adobe Acrobat Reader 4.0 for 32-bit MS Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the MS Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:\temp).

2. Run the Adobe Acrobat Reader setup program. In order to run the setup program, use Windows Explorer and locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:\temp) and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

Download GMS 3.0 Overview Guide (PDF File)

File Size: 609956 bytes
File Date: Tue Dec 21 17:58:39 1999

The GMS Overview Guide is a detailed overview of GMS version 3.0. It provides a description of the major features found in GMS.

Download GMS 3.0 Tutorials Guide (PDF File)

File Size: 895657 bytes
File Date: Thu Feb 10 03:22:45 2000

A complete set of GMS tutorials is provided with this document.

Download GMS 3.0 File Formats Reference (PDF File)

File Size: 340334 bytes
File Date: Thu Feb 10 03:22:54 2000

This document provides a detailed presentation of the GMS version 3.0 file formats.

Download GMS 3.0 Reference Manual (PDF File)

File Size: 3221377 bytes
File Date: Thu Apr 18 16:26:04 2002

This document provides the entire GMS Reference Manual. It is a complete presentation of the GMS software package.

Download MODFLOW version 88 Reference Manual (PDF File)

File Size: 9385088 bytes
File Date: Fri Jan 3 12:02:20 2003

The original MODFLOW documentation "A Modular Three-Dimensional Finite-Difference groundwater Flow Model" by McDonald and Harbaugh.

Download USGS MODFLOW Instructional Problems Manual (PDF File)

File Size: 5482152 bytes
File Date: Thu Apr 18 16:34:47 2002

This manual is intended to provide a curriculum that allows the user to have hand-on experience with the practical application of models using GMS.

Twenty documented problems, complete with problem statements, input data sets, and discussion of results are presented. The problems are designed to cover modeling principles, specifics of input/output options available to the modeler, rules of thumb, and common modeling mistakes.

Download USGS MODFLOW Model Instructional Problems (ZIP File)
File Size: 3997414 bytes
File Date: Tue Jun 2 19:41:44 1998

This zip file contains twenty instructional problems described in the USGS MODFLOW Instructional Problems Manual (PDF File). These files are setup for running using GMS.

Download MODPATH Documentation (PDF File)

File Size: 817156 bytes
File Date: Fri Jan 3 12:03:00 2003

This PDF file contains the complete documentation for the MODPATH groundwater model. The MODPATH Reference Manual includes discussion about particle tracking methodology, time concepts, flow system files, output modes, and example input and output files.

Download MT3D-MS User Manual (PDF File)

File Size: 1822461 bytes
File Date: Fri Aug 4 05:46:23 2000

This manual describes the next-generation of the modular three-dimensional transport model, MT3D-MS, with significantly expanded capabilities.

Download RT3D Tutorials for GMS User (PDF File)

File Size: 246021 bytes
File Date: Thu Feb 10 03:25:59 2000

This report presents a set of tutorial problems that are designed to illustrate how RT3D simulations can be performed within the Department of Defense Groundwater Modeling System (GMS). GMS serves as a pre- and post-processing interface for RT3D. GMS can be used to define all the input files needed by RT3D code, and later the code can be launched from within GMS or run as a separate application. Once the RT3D simulation is completed, the solution can be imported into GMS for graphical post-processing.

Download RT3D User Manual (PDF File)

File Size: 289991 bytes
File Date: Fri Jan 3 12:24:45 2003

This report describes the mathematical details of the RT3D computer model and its input/output data structure.

Download RT3D Version 2 Update Document (PDF File)

File Size: 33897 bytes
File Date: Fri Jan 3 12:24:55 2003

Since RT3D version 2 is based on the MT3D-MS code, the input data structure of BTN, ADV, and DSP files are exactly identical to MT3D-MS inputs as described in Zheng and Wang (1998). The input data for SSM is package is also identical to MT3D-MS SSM package, except in RT3Dv2 SSM package an additional boundary condition designated as the decaying constant source boundary condition is supported. The input data structure for RCT file is almost identical to RT3Dv1-RCT data structure, except in version-2 three new solver options are included and also the sorption parameters can be specified on a cell-by-cell basis. The differences between MT3M-MS SSM and RT3Dv2 SSM input files, and the differences between RT3Dv1-RCT and RT3Dv2-RCT input files are described in this document.

Download SEAM3D Technical Report (PDF File)

File Size: 931996 bytes
File Date: Fri Jan 3 13:01:26 2003

This report describes the development, verification, and application of SEAM3D (sequential electron acceptor model, 3 dimensional), a numerical model for subsurface solute transport with aerobic and sequential anaerobic biodegradation.

Download SEEP2D Primer (PDF File)

File Size: 108023 bytes
File Date: Fri Jan 3 13:00:56 2003

This document is a primer for the GMS SEEP2D numerical modeling system. It should be read completely before any modeling is attempted with SEEP2D.

Download SEEP2D Tutorials (PDF File)

File Size: 269274 bytes
File Date: Tue May 29 13:33:46 2001

The complete set of documentation for the SEEP2D tutorials.

Download FEMWATER Documentation, Version 2.0 (PDF File)

File Size: 449812 bytes
File Date: Thu Feb 10 03:21:12 2000

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

Download FEMWATER Salt Water Intrusion Tutorial and Data (ZIP File)
File Size: 1064154 bytes
File Date: Thu Oct 4 19:51:26 2001

This ZIP file contains the PDF file for tutorial on the application of FEMWATER to salt water intrusion problems and data needed to execute the exercises. FEMWATER is a 3D finite element, saturated/unsaturated, density driven, flow and transport model. This tutorial describes the steps involved in performing a salt water intrusion model using FEMWATER.

To download the following GMS 2.1 reference manuals, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

Download Adobe Acrobat Reader 4.0 for 32-bit MS Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the MS Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:\temp).

2. Run the Adobe Acrobat Reader setup program. In order to run the setup program, use Windows Explorer and locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:\temp) and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

Download GMS 2.1 Overview Guide (PDF File)

File Size: 3027145 bytes
File Date: Thu Feb 10 03:24:09 2000

The GMS Overview Guide is a detailed overview of GMS version 2.1. It provides a description of the major features found in GMS.

Download GMS 2.1 File Formats Reference (PDF File)

File Size: 250231 bytes
File Date: Thu Feb 10 03:23:00 2000

This document provides a detailed presentation of the GMS version 2.1 file formats.

Download GMS 2.1 Reference Manual (PDF File)

File Size: 2948122 bytes
File Date: Fri Aug 20 13:25:12 1999

This document provides the entire GMS Reference Manual. It is a complete presentation of the GMS software package.

Download MODFLOW version 88 Reference Manual (PDF File)

File Size: 9385088 bytes
File Date: Fri Jan 3 12:02:20 2003

The original MODFLOW documentation "A Modular Three-Dimensional Finite-Difference groundwater Flow Model" by McDonald and Harbaugh.

Download USGS MODFLOW Instructional Problems Manual (PDF File)

File Size: 5482152 bytes
File Date: Thu Apr 18 16:34:47 2002

This manual is intended to provide a curriculum that allows the user to have hand-on experience with the practical application of models using GMS.

Twenty documented problems, complete with problem statements, input data sets, and discussion of results are presented. The problems are designed to cover modeling principles, specifics of input/output options available to the modeler, rules of thumb, and common modeling mistakes.

Download USGS MODFLOW Model Instructional Problems (ZIP File)
File Size: 3997414 bytes
File Date: Tue Jun 2 19:41:44 1998

This zip file contains twenty instructional problems described in the USGS MODFLOW Instructional Problems Manual (PDF File). These files are setup for running using GMS.

Download MODPATH Documentation (PDF File)

File Size: 817156 bytes
File Date: Fri Jan 3 12:03:00 2003

This PDF file provides the complete documentation for the MODPATH groundwater model. The MODPATH Reference Manual includes discussion about particle tracking methodology, time concepts, flow system files, output modes, and example input and output files.

Download MT3D Documentation (PDF File)

File Size: 1439552 bytes
File Date: Thu Feb 10 03:25:39 2000

This PDF file provides the complete documentation for the MT3D groundwater model. The MT3D Reference Manual includes discussion about the fundamentals of the MT3D transport model, numerical implementation, program structure and design, input instructions, and sample input and output files.

Download RT3D User Manual (PDF File)

File Size: 289991 bytes
File Date: Fri Jan 3 12:24:45 2003

This report describes the mathematical details of the RT3D computer model and its input/output data structure.

Download Tutorial Documentation of RT3D (PDF File)

File Size: 269039 bytes
File Date: Thu Feb 10 03:25:53 2000

This document presents a set of tutorial problems that are designed to illustrate how RT3D simulations can be performed within GMS version 2.1.

Download SEEP2D Primer (PDF File)

File Size: 108023 bytes
File Date: Fri Jan 3 13:00:56 2003

The documentation provides general introduction for SEEP2D module. It also provides some guidelines for mesh generation and selection of boundary conditions and model parameters to help minimize improper application of SEEP2D.

Download SEEP2D Tutorials (PDF File)

File Size: 269274 bytes
File Date: Tue May 29 13:33:46 2001

The complete set of documentation for the SEEP2D tutorials.

Download FEMWATER Documentation, Version 2.0 (PDF File)

File Size: 449812 bytes
File Date: Thu Feb 10 03:21:12 2000

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

Download FEMWATER Documentation, Version 3.0 (PDF File)-File TextThe complete set of documentation for the FEMWATER groundwater model.

File Size: 514010 bytes
File Date: Fri Jan 3 12:59:49 2003

Download FEMWATER Salt Water Intrusion Tutorial and Data (ZIP File)
File Size: 1064154 bytes
File Date: Thu Oct 4 19:51:26 2001

This ZIP file contains the PDF file for tutorial on the application of FEMWATER to salt water intrusion problems and data needed to execute the exercises. FEMWATER is a 3D finite element, saturated/unsaturated, density driven, flow and transport model. This tutorial describes the steps involved in performing a salt water intrusion model using FEMWATER.

Download Defining MODFLOW Layer Data Tech Document (PDF File)

File Size: 40770 bytes
File Date: Thu Feb 10 03:24:39 2000

One of the most important steps in defining a MODFLOW model is to define the layer data (stratigraphy). In most cases, it is more appropriate to use the 2D geostatistical tools in GMS to smoothly interpolate layer geometries and then use the Data Calculator to compute geometry-based parameters such as transmissivity. The steps involved in defining layer data in this fashion are described in this document.

Download GMS PEST Utilities Documentation (PDF File)

File Size: 104760 bytes
File Date: Thu Feb 10 03:25:42 2000

The GMS PEST Utilities are a set of programs which facilitate the use of PEST in the GMS environment. They are designed to enhance the model calibration functionality already built into GMS by automating construction of PEST input files based on the contents of observation coverages accessed through the GMS map module (versions 2.1 and later).

To download the following MODFLOW technical documents, check the box of the desired documents and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat PDF version 4.0 format.

Download Adobe Acrobat Reader 4.0 for 32-bit MS Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the MS Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:\temp).

2. Run the Adobe Acrobat Reader setup program. In order to run the setup program, use Windows Explorer and locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:\temp) and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

Download MODFLOW version 2000 Reference Manual (PDF File)

File Size: 591726 bytes
File Date: Fri Apr 20 02:02:26 2001

USGS Open-File Report 00-92
Authors: Arlen W. Harbaugh, Edward R. Banta, Mary C. Hill, and Michael G. McDonald

This report documents a new version of MODFLOW, called MODFLOW 2000, which is designed to accommodate the solution of equations in addition to the groundwater flow equation.

Download MODFLOW version 96 Reference Manual (PDF File)

File Size: 140555 bytes
File Date: Mon Jun 26 18:04:53 2000

USGS Open-File Report 96-485
Authors: Arlen W. Harbaugh and Michael G. McDonald

A number of changes have been made to the U.S. Geological Survey modular finite-difference groundwater flow model, which is commonly known as MODFLOW. Existing MODFLOW input files will work with the revised model. Also, the basic structure and computational methods of the model have been maintained. Those familiar with the original model should have no difficulty adapting to the revised model.

Download MODFLOW version 96 Programmer Documentation (PDF File)

File Size: 426831 bytes
File Date: Fri Apr 20 02:03:23 2001

USGS Open-File Report 96-486
Authors: Arlen W. Harbaugh and Michael G. McDonald

A number of changes have been made to the U.S. Geological Survey modular finite-difference groundwater flow model, which is commonly known as MODFLOW. This report provides programmer's documentation for the revised code, which is called MODFLOW-96 to distinguish it from other versions of MODFLOW. A complete listing of the MODFLOW-96 code is provided. The listings are organized by package and by module within a package.

Download MODFLOW version 88 Reference Manual (PDF File)

File Size: 9385088 bytes
File Date: Fri Jan 3 12:02:20 2003

The original MODFLOW documentation "A Modular Three-Dimensional Finite-Difference groundwater Flow Model" by McDonald and Harbaugh.

Download USGS MODFLOW Instructional Problems Manual (PDF File)

File Size: 5482152 bytes
File Date: Thu Apr 18 16:34:47 2002

This manual is intended to provide a curriculum that allows the user to have hand-on experience with the practical application of models using GMS.

Twenty documented problems, complete with problem statements, input data sets, and discussion of results are presented. The problems are designed to cover modeling principles, specifics of input/output options available to the modeler, rules of thumb, and common modeling mistakes.

Download USGS MODFLOW Model Instructional Problems (ZIP File)
File Size: 3997414 bytes
File Date: Tue Jun 2 19:41:44 1998

This zip file contains twenty instructional problems described in the USGS MODFLOW Instructional Problems Manual (PDF File). These files are setup for running using GMS.

Download Variable Recharge Package Documentation (PDF File)

File Size: 539040 bytes
File Date: Thu May 9 11:16:35 2002

This report documents the Variable Recharge Package.The report also describes conceptual development and formulation of the method and presents (1) a general description of the model code and of model input and output, (2) an example of model input and output for a simple one-layer model, and (3) a listing of the Variable Recharge Package computer code and description of program variables.

Download BCF2 Package Documentation (PDF File)

File Size: 4124915 bytes
File Date: Thu Apr 18 16:22:22 2002

USGS Open-File Report 91-536
Authors: Michael G. McDonald, Arlen W. Harbaugh, Brennon R. Orr, and, Daniel J. Ackerman

The U.S. Geological Survey Modular groundwater Flow Model, commonly referred to as MODFLOW, simulates groundwater flow through porous media using the finite-difference method. The region being modeled is divided into a grid of cells, and each cell is defined to be either no-flow, variable-head, or constant-head. The model calculates a value for head at all variable-head cells whereas head at constant-head cells is specified by the user.

Download CHD1 Package Documentation (PDF File)

File Size: 20686 bytes
File Date: Mon Jun 26 18:02:48 2000

Appendix C of the documentation of the CHD1 Package (1991).
Authors: S.A. Leake and D.E. Prudic

The Time-Variant Specified-Head Package was developed to allow constant-head cells to take on different values for each time step. It provides a means of simulating head variations with time that can be approximated with piecewise linear segments. The Time-Variant Specified-Head Package does not alter the way constant-head boundaries are formulated in the finite-difference equations of the model by McDonald and Harbaugh (1988).

Download DE45 Package Documentation (PDF File)

File Size: 89578 bytes
File Date: Mon Jun 26 18:04:46 2000

USGS Open-File Report 95-288
Authors: Arlen W. Harbaugh

This report documents a direct solver for MODFLOW, the U.S. Geological Survey modular three-dimensional finite-difference groundwater flow model. Included in the report are input instructions, a description of concepts and implementation, and detailed program documentation. Although direct solvers require more memory and typically require more computational effort than iterative solvers, a direct solver is more efficient when solving small, linear problems.

Download FHB1 Package Documentation (PDF File)

File Size: 350987 bytes
File Date: Mon Jun 26 18:05:03 2000

USGS Open-File Report 97-571
Authors: S. A. Leake and Michael. R. Lilly

A computer program called the Flow and Head Boundary Package (FHB1) was developed for the U.S. Geological Survey three-dimensional finite-difference modular groundwater flow model, commonly referred to as MODFLOW. FHB1 allows MODFLOW user to specify flow or head boundary conditions that vary at times other than starting and ending times of stress periods and associated time steps.

Download HFB1 Package Documentation (PDF File)

File Size: 2226077 bytes
File Date: Mon Jun 26 18:03:39 2000

USGS Open-File Report 92-477
Authors: Paul A. Hsieh and John R. Freckleton

As an addition to the U.S. Geological Survey's Modular Three-Dimensional Finite-Difference groundwater Flow Model, the Horizontal-Flow-Barrier (HFB) Package simulates thin, vertical low-permeability geologic features that impede the horizontal flow of ground water. These geologic features are approximated as a series of horizontal-flow barriers conceptually situated on the boundaries between pairs of adjacent cells in the finite-difference grid.

Download IBS1 Package Documentation (PDF File)

File Size: 2812597 bytes
File Date: Mon Jun 26 18:04:44 2000

Authors: S.A. Leake and D.E. Prudic

Removal of ground water by pumping from aquifers may result in compaction of compressible fine-grained beds that are within or adjacent to the aquifers. Compaction of the sediments and resulting land subsidence may be permanent if the head declines result in vertical stresses beyond the previous maximum stress.

Download PCG2 Package Documentation (PDF File)

File Size: 16851634 bytes
File Date: Fri Jan 3 12:24:17 2003

Author: Mary C. Hill

This report documents PCG2: a numerical code to be used with the U.S. Geological Survey modular three-dimensional, finite-difference, ground-water flow model. PCG2 uses the preconditioned conjugate-gradient method to solve the equations produced by the model for hydraulic head. Linear or nonlinear flow conditions may be simulated.

Download HUF Package Documentation (PDF File)

File Size: 555149 bytes
File Date: Fri Apr 20 02:02:39 2001

USGS Open-File Report 00-342
Authors: Evan R. Anderman and Mary C. Hill

This report documents the Hydrogeologic-Unit Flow (HUF) Package for the groundwater modeling computer program MODFLOW-2000. The HUF Package is an alternative internal flow package that allows the vertical geometry of the system hydrogeology to be defined explicitly within the model using hydrogeologic units that can be different than the definition of the model layers.

Download EVT and DRN Package Documentation (PDF File)

File Size: 509761 bytes
File Date: Fri Apr 20 02:02:51 2001

USGS Open File Report 00-466
Author: Edward R. Banta

Two new packages for the U.S. Geological Survey modular finite-difference groundwater-flow model MODFLOW-2000 are documented. The new packages provide flexibility in simulating evapotranspiration and drain features not provided by the MODFLOW-2000 Evapotranspiration (EVT) and Drain (DRN) Packages. The report describes conceptualization of the packages, input instructions, listings and explanations of the source code, and example simulations.

Download MODFLOW version 2000 Parameter Estimation Process Documentation (PDF File)

File Size: 671065 bytes
File Date: Fri Apr 20 02:03:07 2001

USGS Open-File Report 00-184
Authors: Mary C. Hill, Edward R. Banta, Arlen W. Harbaugh, and Evan R. Anderman

This report documents the Observation, Sensitivity, and Parameter-Estimation Processes of the groundwater modeling computer program MODFLOW-2000. The Observation Process generates model-calculated values for comparison with measured, or observed, quantities. A variety of statistics is calculated to quantify this comparison, including a weighted least-squares objective function.

Download TLK1 Package Documentation (PDF File)

File Size: 242138 bytes
File Date: Fri Apr 20 02:03:13 2001

USGS Open-File report 9459
Authors: S.A. Leake, P. Patrick Leahy, and Anthony S. Navoy

This report presents a new method of simulating transient leakage from confining units using the U.S. Geological Survey Modular Finite-Difference groundwater Flow Model. Transient leakage into or out of a compressible fine-grained confining unit results from groundwater storage changes within the unit. The importance of fine-grained units in analyses of transient groundwater flow is not always recognized. The new method of simulating transient leakage in the Modular Finite-Difference groundwater Flow Model is referred to as the Transient-Leakage Package, version 1, or the TLK1 Package. The TLK1 Package solves integrodifferential equations that describe the flow components across the upper and lower boundaries of confining units.

Download RES1 Package Documentation (PDF File)

File Size: 106868 bytes
File Date: Mon Jun 26 18:04:49 2000

USGS Open-File Report 96-364
Authors: J.P. Fenske, S.A. Leake and D.E. Prudic

A set of computer subroutines called the Reservoir Package (RES1) was developed for the U.S. Geological Survey three-dimensional finite-difference modular groundwater flow model, commonly referred to as MODFLOW. The Reservoir Package simulates leakage between a reservoir and an underlying groundwater system as the reservoir area expands and contracts in response to changes in reservoir stage.

Download STR1 Package Documentation (PDF File)

File Size: 8437832 bytes
File Date: Thu Apr 18 16:51:55 2002

USGS Open-File Report 88-729
Author: David. E. Prudic

Computer models are widely used to simulate groundwater flow for evaluating and managing the groundwater resources of many aquifers, but few are designed to also account for surface flow in streams. A computer program was written for use in the U.S. Geological Survey modular finite-difference groundwater flow model to account for the amount of flow in streams and to simulate the interaction between surface streams and ground water.

Download USGS MFDGWFM Document (PDF File)

File Size: 677645 bytes
File Date: Fri Apr 20 02:02:12 2001

This report presents a FORTRAN computer program that generates simulated time-series data as output from the U.S. Geological Survey Modular Finite-Difference GroundWater Flow Model at user-specified point locations or a collection of points that compose a profile through the modeled region.

Download MODFLOW Direct Solver Documentation (PDF File)

File Size: 89578 bytes
File Date: Mon Jun 26 18:04:46 2000

USGS Open-File Report 95-288
Author: Arlen W. Harbaugh

This report documents a direct solver for MODFLOW, the U.S. Geological Survey modular three-dimensional finite-difference groundwater flow model. Included in the report are input instructions, a description of concepts and implementation, and detailed program documentation.

Download LAK3 Package Documentation (PDF File)

File Size: 6432836 bytes
File Date: Sun May 5 20:33:53 2002

Water-Resources Investigations Report 00-4167
Authors: Michael L. Merritt and Leonard F. Konikow

This report documents the new LAK3 package for MODFLOW.

Download Technical Document about GMS and CCF Files (PDF File)

File Size: 14416 bytes
File Date: Fri May 26 12:22:06 2000

The MODFLOW manual is difficult at best, but does state that CCF values are volumetric flow per time (e.g., m3/day). Based on simulations, it really represents the (volumetric flow porosity) per time. That matches with MODPATH and MT3D/RT3D results.

This document is provided by Jacob Johnson of Pacific Northwest National Laboratory.

To download the following MOC3D technical documentation, check the box of the document below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. The document is available in Adobe Acrobat version 4.0 PDF format.

Download MOC3D Version 3.5 Documentation (PDF File)

File Size: 565521 bytes
File Date: Thu Aug 1 12:56:29 2002

This report documents the USGS Eulerian-Lagrangian Localized Adjoint Method (ELLAM) algorithm that solves an integral form of the solute-transport equation, incorporating an implicit-in-time difference approximation for the dispersive and sink terms. Like the algorithm in the original version of the USGS MOC3D transport model, ELLAM uses a method of characteristics approach to solve the transport equation on the basis of velocity field. The ELLAM algorithm is based on an integral formulation of conservation of mass and uses appropriate numerical techniques to obtain global conservation of mass. The implicit procedure eliminates several stability criteria required for an explicit formulation. Consequently, ELLAM allows large transport time increments to be used. ELLAM can produce qualitatively good results using a small number of transport time steps.

Download MOC3D Version 3.0 Documentation (PDF File)

File Size: 637105 bytes
File Date: Thu Aug 1 12:56:57 2002

This report describes modifications to MOC3D. These modifications expand the capabilities of MOC3D to simulate the age of water in an aquifer, the effects of double porosity on concentrations of a single solute, and the effects of decay and zero-order growth reactions on a single solute. These modifications are incorporated into MOC3D version 3.0.

Download MOC3D Version 2.0 Documentation (PDF File)

File Size: 393723 bytes
File Date: Thu Aug 1 12:56:05 2002

This report documents an extension to the USGS MOC3D transport model that incorporates an implicit-in-time difference approximation for the dispersive transport equation, including source/sink terms. The original MOC3D transport model (Version 1) uses the method of characteristics to solve the transport equation on the basis of the velocity field. The original MOC3D solution algorithm incorporates particle tracking to represent advective processes and an explicit finite-difference formulation to calculate dispersive fluxes. The new implicit procedure eliminates several stability criteria required for the previous explicit formulation. This allows much larger transport time increments to be used in dispersion-dominated problems. The decoupling of advective and dispersive transport in MOC3D, however, is unchanged. With the implicit extension, the MOC3D model is upgraded to Version 2.

Download MOC3D Version 1.0 Documentation (PDF File)

File Size: 1173715 bytes
File Date: Thu Aug 1 13:42:26 2002

This report presents MOC3D, a model that simulates three-dimensional solute transport in flowing ground water. It includes a description of the theoretical basis of the model, a detailed description of input requirements and output options, and the results of model testing and evaluation. The model was evaluated for several problems for which exact analytical solutions are available and by benchmarking against other numerical codes for selected complex problems for which no exact solutions are available. These test results indicate that the model is very accurate for a wide range of conditions and yields minimal numerical dispersion for advection-dominated problems. Mass-balance errors are generally less than 10 percent, and tend to decrease and stabilize with time.

To download the following MODPATH technical documentation, check the box of the document below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. The document is available in Adobe Acrobat version 4.0 PDF format.

Download MODPATH Documentation (PDF File)

File Size: 817156 bytes
File Date: Fri Jan 3 12:03:00 2003

This PDF file provides the complete documentation for the MODPATH groundwater model. The MODPATH Reference Manual includes discussion about particle tracking methodology, time concepts, flow system files, output modes, and example input and output files.

To download the following MT3D-MS (Multi-Species) technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download Documentation and User's Guide for MT3DMS (PDF File)

File Size: 2250350 bytes
File Date: Fri Jan 3 12:05:21 2003

This PDF file contains documentation and a user's guide for MT3DMS: a modular three-dimensional multispecies transport model for simulation of advection, dispersion, and chemical reactions of contaminants in groundwater systems.

Download Documentation for the Mass Budget Accounting of MT3D (PDF File)

File Size: 22788 bytes
File Date: Wed Mar 11 16:13:09 1998

One of the most subtle aspects of MT3D is its mass budget accounting. The objective of this note is to provide some guidance on the interpretation of the mass budget.

Download Documentation for the Transport Time Step Control of MT3D (PDF File)

File Size: 18928 bytes
File Date: Wed Mar 11 16:19:21 1998

This document is intended to provide detailed coverage of MT3D transport step sizes. It's divided into six sections:

1. Setting the transport step size.
2. Identifying the allowable transport step size for each transport process.
3. Interpreting the allowable transport step size for each transport process.
4. Identifying the overall allowable transport step size.
5. A general suggestion for minimizing execution times.
6. Specific suggestions for increasing allowable transport step sizes.

To download the following RT3D technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download RT3D Version 2 Update Document (PDF File)

File Size: 33897 bytes
File Date: Fri Jan 3 12:24:55 2003

Since RT3D version-2 is based on the MT3D-MS code, the input data structure of BTN, ADV, and DSP files are exactly identical to MT3D-MS inputs as described in Zheng and Wang (1998). The input data for SSM is package is also identical to MT3D-MS SSM package, except in RT3Dv2 SSM package an additional boundary condition designated as the decaying constant source boundary condition is supported. The input data structure for RCT file is almost identical to RT3Dv1-RCT data structure, except in version-2 three new solver options are included and also the sorption parameters can be specified on a cell-by-cell basis. The differences between MT3M-MS SSM and RT3Dv2 SSM input files, and the differences between RT3Dv1-RCT and RT3Dv2-RCT input files are described in this document.

Download RT3D User Manual (PDF File)

File Size: 289991 bytes
File Date: Fri Jan 3 12:24:45 2003

This report describes the mathematical details of the RT3D computer model and its input/output data structure.

Download Document about RT3D Reaction Module for Modeling Biodegradation Coupled with NAPL Dissolution Processes (PDF File)

File Size: 32759 bytes
File Date: Wed Nov 4 15:16:24 1998

This document describes RT3D Reaction Module for Modeling Biodegradation Coupled with NAPL Dissolution Processes.

Download RT3D Documentation (PDF File)

File Size: 467770 bytes
File Date: Thu Jan 10 17:19:25 2002

This documentation illustrates how RT3D simulations can be performed within GMS.

Download Document about RT3D Reaction Module for Modeling Contaminant Transport in Dual Domain Porous Media (PDF File)

File Size: 20775 bytes
File Date: Thu Feb 10 03:21:01 2000

This document describes RT3D Reaction Module for Modeling Contaminant Transport in Dual Domain Porous Media.

To download the following SEAM3D technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download SEAM3D Model Specification (PDF File)

File Size: 1229330 bytes
File Date: Mon Nov 15 14:58:07 1999

SEAM3D, a new numerical model for subsurface solute transport with aerobic and sequential anaerobic biodegradation.

Download SEAM3D Technical Report (PDF File)

File Size: 931996 bytes
File Date: Fri Jan 3 13:01:26 2003

This report describes the development, verification, and application of SEAM3D (sequential electron acceptor model, 3 dimensional), a numerical model for subsurface solute transport with aerobic and sequential anaerobic biodegradation.

To download the following FEMWATER technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download FEMWATER Documentation, Version 3.0 (PDF File)

File Size: 514010 bytes
File Date: Fri Jan 3 12:59:49 2003

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

Download FEMWATER Documentation, Version 2.0 (PDF File)

File Size: 449812 bytes
File Date: Thu Feb 10 03:21:12 2000

The complete set of documentation for the FEMWATER groundwater model. The FEMWATER Reference Manual includes discussion about FEMWATER analysis options, material properties, boundary conditions, initial conditions, and sample applications.

Download FEMWATER Salt Water Intrusion Tutorial and Data (ZIP File)
File Size: 1064154 bytes
File Date: Thu Oct 4 19:51:26 2001

This ZIP file contains the PDF file for tutorial on the application of FEMWATER to salt water intrusion problems and data needed to execute the exercises. FEMWATER is a 3D finite element, saturated/unsaturated, density driven, flow and transport model. This tutorial describes the steps involved in performing a salt water intrusion model using FEMWATER.

To download the following SEEP2D technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download SEEP2D Primer (PDF File)

File Size: 108023 bytes
File Date: Fri Jan 3 13:00:56 2003

This document is a primer for the GMS SEEP2D numerical modeling system. It should be read completely before any modeling is attempted with SEEP2D.

Download SEEP2D Tech Document 1 (PDF File)

File Size: 19700 bytes
File Date: Thu Feb 10 03:26:32 2000

Areal seepage flow modeling technical reference document.

Download SEEP2D Tech Document 2 (PDF File)

File Size: 85324 bytes
File Date: Thu Feb 10 03:26:35 2000

Finite element seepage flow modeling technical reference document.

Download complete set of documentation for the SEEP2D tutorials (PDF File)

File Size: 269274 bytes
File Date: Tue May 29 13:33:46 2001

The complete set of documentation for the SEEP2D tutorials.

To download the following UTCHEM technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download UTCHEM 9.0 Technical Documentation (PDF File)

File Size: 2864997 bytes
File Date: Wed Oct 18 17:27:19 2000

Pioneering research being conducted at The University of Texas at Austin is providing a scientific and engineering basis for modeling and enhanced recovery of oil and the enhanced remediation of aquifers through the development and application of compositional simulators. This research has resulted in the development and application of UTCHEM, a 3-D, multicomponent, multiphase, compositional model of chemical flooding processes which accounts for complex phase behavior, chemical and physical transformations and heterogeneous porous media properties, and uses advanced concepts in high-order numerical accuracy and dispersion control and vector and parallel processing.

Download UTCHEM 9.0 User Guide (PDF File)

File Size: 302803 bytes
File Date: Wed Oct 18 17:27:28 2000

This document contains the complete User Guide to UTCHEM which is a three-dimensional chemical flooding simulator.

To download the following NUFT technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download User's Manual for USNT Module of the NUFT Code, Version 2.0 (PDF File)

File Size: 458175 bytes
File Date: Thu Jan 10 17:06:34 2002

This documentation is a user manual for the USNT module of the NUFT code (NP-phase, NC-component, thermal).

Download NUFT Flow and Transport Code Reference Manual, Version 2.0 (PDF File)

File Size: 374089 bytes
File Date: Thu Jan 10 17:06:20 2002

This documentation is a reference manual for the NUFT flow and transport code.

To download the following UCODE technical documentation, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. The document is available in Adobe Acrobat version 4.0 PDF format.

Download UCODE Documentation (PDF File)

File Size: 328857 bytes
File Date: Fri Jan 3 13:02:20 2003

This report documents the computer program UCODE, which performs inverse modeling, posed as a parameter estimation problem, using nonlinear regression.

Download Guide for Model Calibration using Inverse Modeling (PDF File)

File Size: 518307 bytes
File Date: Fri Apr 20 02:05:59 2001

Water-Resources Investigations Report 98-4005
Author: Mary C. Hill

This report documents methods and guidelines for model calibration using inverse modeling.

To download the following PEST technical documentation, check the box of the desired documents below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat version 4.0 PDF format.

Download PEST Documentation (PDF File)

File Size: 1080433 bytes
File Date: Fri Jan 3 13:00:52 2003

This documentation describes the use of PEST, parameter optimizer for determining MODFLOW model values with use in GMS.

To download the following technical documents, check the box of the desired documents below and then click the "Download Selected" button. An e-mail will be sent to you with the download links. These documents are available in Adobe Acrobat 4.0 PDF format.

Download Adobe Acrobat Reader 4.0 for 32-bit Windows
File Size: 6686176 bytes
File Date: Tue Oct 10 02:33:36 2000

In order to read documentation in the PDF file format, you must have Adobe Acrobat Reader 4.0 installed. We have provided the Microsoft Windows version for download. If you require a non-Windows reader, visit Adobe.

To install the Adobe Acrobat Reader, perform the following steps:

1. Download the installation file and save it to a temporary directory (e.g., c:\temp).

2. Run the Adobe Acrobat Reader setup program. Using Windows Explorer, locate the directory that contains Adobe Acrobat Reader setup executable (e.g., c:\temp), and double-click on the file.

3. Follow the installation instructions.

4. Delete the Adobe Acrobat Reader installation file. Once Adobe Acrobat Reader has been successfully installed, the installation files can be safely removed.

Download Estimating Areas Contributing Recharge to Wells (PDF File)

File Size: 999398 bytes
File Date: Fri Aug 23 10:39:50 2002

About one-third of the population of the United States obtains drinking water from public-supply systems that rely on ground water. Because of the large number of resource planners, and the public are concerned about the quality of ground water pumped by public-supply wells. Most human-derived contaminants in ground water are related to activities at the land surface and enter the ground water flow system at the water table after passing through the unsaturated zone. A second important location of contaminant entry, which is of much smaller areal extent than the water table, is the beds and banks of streams, reservoirs, lakes, and wetlands. Given that most human-derived contaminants enter the ground water flow system directly or indirectly from the land surface, one approach for protecting public ground water supplies is to estimate areas contributing recharge to public-supply wells and then to implement ground water protection practices on the overlying land surface.

This report provides a brief review of selected concepts, assumptions, and uncertainties related to estimating areas contributing recharge to wells. Emphasis is on estimating contributing areas by numerical simulation and on what has been learned from previous studies by the USGS using this approach.

Download Ground Water and Surface Water: A Single Resource (PDF File)

File Size: 12191593 bytes
File Date: Tue Jul 16 12:22:04 2002

Understanding the interaction of ground water and surface water is essential to water managers and water scientists. Management of one component of the hydrologic system, such as a stream or an aquifer, is only partly effective because each hydrologic component is in continuing interaction with other components. This PDF technical document has some examples of common water-resource issues where understanding the interconnections of ground water and surface water is fundamental to development of effective water-resource management and policy.

Download Technical Protocol for Evaluating Natural Attenuation of Chlorinated Solvents in Ground Water (PDF File)

File Size: 2605741 bytes
File Date: Sat May 13 20:31:02 2000

This document presents a technical protocol for data collection and analysis to evaluate monitored natural attenuation through biological processes for remediating ground water contaminated with mixtures of fuels and chlorinated aliphatic hydrocarbons. This document focuses on technical issues and is not intended to address policy considerations or specific regulatory or statutory requirements. In addition, this document does not provide comprehensive guidance on overall site characterization or long-term monitoring of MNA remedies. User of this protocol should realize that different Federal and State remedial programs may have somewhat different remedial objectives.

Download Technical Document about GMS and CCF Files (PDF File)

File Size: 14416 bytes
File Date: Fri May 26 12:22:06 2000

The MODFLOW manual is difficult at best, but does state that CCF values are volumetric flow per time (e.g., m3/day). Based on simulations, it really represents the (volumetric flow porosity) per time. That matches with MODPATH and MT3D/RT3D results.

This document is provided by Jacob Johnson of Pacific Northwest National Laboratory.

Download Documentation for the Mass Budget Accounting of MT3D (PDF File)

File Size: 22788 bytes
File Date: Wed Mar 11 16:13:09 1998

One of the most subtle aspects of MT3D is its mass budget accounting. The objective of this note is to provide some guidance on the interpretation of the mass budget.

Download Documentation for the Transport Time Step Control of MT3D (PDF File)

File Size: 18928 bytes
File Date: Wed Mar 11 16:19:21 1998

This document is intended to provide detailed coverage of MT3D transport step sizes. It's divided into six sections:

1. Setting the transport step size.
2. Identifying the allowable transport step size for each transport process.
3. Interpreting the allowable transport step size for each transport process.
4. Identifying the overall allowable transport step size.
5. A general suggestion for minimizing execution times.
6. Specific suggestions for increasing allowable transport step sizes.

Download Tech Document for Making 3D Plots of Computed Water Table Surfaces (PDF File)

File Size: 15166 bytes
File Date: Wed Mar 11 15:17:36 1998

The basic form of output from MODFLOW is a set of computed heads. The simplest way to plot these heads is through the use of layer contours. However, this is essentially a 2D plot. It is often useful (and impressive to bosses and clients) to develop a 3D oblique view of the water table surface. This document describes the steps involved in developing such a plot.

Download Tech Document for Draping a TIFF Image on a Terrain Surface (PDF File)

File Size: 17469 bytes
File Date: Thu Feb 10 03:21:00 2000

GMS can be used to "drape" or texture map a TIFF image representing a scanned map or an aerial photo onto a 2D terrain surface to get a highly realistic plot of a site. Generating such an image is accomplished using the steps in this document.

Download Tech Document for Telescopic Regional to Local Model Conversion (PDF File)

File Size: 59525 bytes
File Date: Wed Mar 11 16:20:03 1998

GMS provides a set of tools that can be used for telescopic regional to local model conversion. This process is not fully automated and requires a number of steps to be completed in order. However, the process is quite simple and can usually be accomplished within a few minutes.

Download Technical Document about Uncompressing .tar.gz Files Using WinZIP (PDF File)

File Size: 36903 bytes
File Date: Fri Nov 6 02:55:05 1998

This technical document describes how to use WinZIP to uncompress UNIX .tar.gz files.

WinZIP can handle UNIX .tar.gz files but it does get confused by the two dots in the filename. This document describes in detail how to uncompress .tar.gz files using WinZIP.

To download the following GMS Slide Show software package (including a slide show program), check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. The slide show is an interactive PowerPoint presentation which, using graphical illustrations, describes the features and benefits of using GMS.

Download GMS Slide Show for MS Windows
File Size: 3447705 bytes
File Date: Tue Aug 3 11:55:21 1999

To install the GMS Slide Show software package, download the GMS Slide Show installation file and save it to a temporary directory (e.g., c:\temp). Then run the file to extract 3 files (install.exe, install.w02, install.w03). Run install.exe to install the GMS Slide Show.

To download the following GMS AVI animations, check the boxes below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links.

Download MODFLOW Flow Velocity AVI Animation (ZIP File)
File Size: 99223 bytes
File Date: Wed Dec 10 02:04:00 1997

Demonstrating two cutting planes showing the cell-center flow vectors and contouring flow velocity due to a MODFLOW simulation illustrating the effect of an extraction well.

Download 3-D Contamination Plume AVI Animation 1 (ZIP File)
File Size: 244551 bytes
File Date: Wed Dec 10 02:05:27 1997

Demonstrating 2 cutting planes and an isosurface shell showing the extent of contamination. The contamination values were interpolated to a 3-D grid using 3-D geostatistics.

Download 3-D Contamination Plume AVI Animation 2 (ZIP File)
File Size: 143051 bytes
File Date: Wed Dec 10 02:07:04 1997

Demonstrating the extent of a jet fuel contamination spill. The 3-D isosurfaces were interpolated to the bounding grid using kriging.

Download 3-D Contamination Plume AVI Animation 3 (ZIP File)
File Size: 84323 bytes
File Date: Mon Jul 28 10:39:33 1997

Demonstrating a 3-D interpolation of a contaminant spill using IDW interpolation to the 3-D grid. Contaminant isosurfaces are in parts per million (ppm).

Download MT3D Contamination Contour AVI Animation 1 (ZIP File)
File Size: 51348 bytes
File Date: Wed Dec 10 02:06:09 1997

Demonstrating the flow of leachate from a landfill site towards an extraction well and specified head conditions, using a dynamic MT3D analysis.

Download MT3D Contamination Contour AVI Animation 2 (ZIP File)
File Size: 55594 bytes
File Date: Wed Dec 10 02:06:22 1997

Demonstrating the spread of a contaminant over a one year period towards an extraction well, using a dynamic MT3D analysis. A no-flow horizontal boundary lies between the contaminant source and extraction well, altering the contaminant flow direction.

Download 3-D FEMWATER Salt Water Intrusion AVI Animation (ZIP File)
File Size: 78404 bytes
File Date: Wed Dec 10 02:07:38 1997

Demonstrating a FEMWATER dynamic simulation. Illustrates a salt water interface and a brine pond as it infiltrates a fresh water aquifer due to an extraction well mid-way between the sea coast and the brine pond. An aquitard lies horizontally mid-height in the model, altering the transport of sea water.

To download the complete set of MODFLOW program files, check the box of the appropriate file below (either PC zip file or UNIX tar file) and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download MODFLOW 2000 Program Files (ZIP File)
File Size: 13638656 bytes
File Date: Mon Apr 22 14:25:29 2002

Zip file that contains program files and source code for MODFLOW 2000.

Download MODFLOW Program Files for 16-bit MS Windows, 10,000,000 Cells (ZIP File)
File Size: 355910 bytes
File Date: Tue Sep 8 02:03:39 1998

Program files and source code for MODFLOW, 10,000,000 Cells (16-bit version).

Download MODFLOW Program Files for 32-bit MS Windows, 15,000,000 Cells (ZIP File)
File Size: 692224 bytes
File Date: Fri Jun 7 08:23:57 2002

Program files and source code for MODFLOW, 15,000,000 Cells (32-bit version).

Download MODFLOW Program Files for 32-bit MS Windows, 10,000,000 Cells (ZIP File)
File Size: 361966 bytes
File Date: Mon Mar 8 11:30:45 1999

Program files and source code for MODFLOW, 10,000,000 Cells (32-bit version).

Download MODFLOW Program File for PEST and UCODE (ZIP File)
File Size: 254561 bytes
File Date: Fri Apr 16 11:23:04 1999

This is the MODFLOW executable which operates with PEST and UCODE (parameter calibration programs). It is different from the standard version in the sense that it can be called repeatedly and does not remain on the screen in a DOS session. This allows it to be called numerous times when re-running MODFLOW in calibrating a model.

Download MODFLOW Program Files for UNIX-X Windows (Compressed TAR File)
File Size: 124325 bytes
File Date: Wed Jun 10 09:38:10 1998

After you have downloaded the file, perform the following steps:

1. Move the MODFLOW tar file into your GMS directory.
2. Uncompress the MODFLOW tar file by typing:

   uncompress MODFLOW.tar

3. Untar the MODFLOW tar file by typing:

   tar -xvf MODFLOW.tar

4. Build the MODFLOW executable by typing the following:

   cd mfsrc
   make

5. Delete the MODFLOW tar file (optional).

To download the complete set of MOC3D program files, check the box of the appropriate file below and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download MOC3D Program Files for 16-bit MS Windows
File Size: 3493888 bytes
File Date: Thu Aug 1 12:41:53 2002

MOC3D is a general-purpose computer model developed by the U.S. Geological Survey for simulation of three-dimensional solute transport in ground water. The model is an update to the MOC model and is implemented as an optional “package” for the groundwater flow model MODFLOW. Directly coupling the time-tested MOC transport algorithms with the MODFLOW program makes MOC3D a powerful tool for simulation of solute transport in ground water in many hydrogeologic settings.

Download MOC3D Program Files for SUN
File Size: 3413398 bytes
File Date: Thu Aug 1 12:48:20 2002

MOC3D is a general-purpose computer model developed by the U.S. Geological Survey for simulation of three-dimensional solute transport in ground water. The model is an update to the MOC model and is implemented as an optional “package” for the groundwater flow model MODFLOW. Directly coupling the time-tested MOC transport algorithms with the MODFLOW program makes MOC3D a powerful tool for simulation of solute transport in ground water in many hydrogeologic settings.

Download MOC3D Source Code for SUN
File Size: 3029858 bytes
File Date: Thu Aug 1 12:45:52 2002

Download the source code for MOC3D on the SUN operating system. MOC3D is a general-purpose computer model developed by the U.S. Geological Survey for simulation of three-dimensional solute transport in ground water. The model is an update to the MOC model and is implemented as an optional “package” for the groundwater flow model MODFLOW. Directly coupling the time-tested MOC transport algorithms with the MODFLOW program makes MOC3D a powerful tool for simulation of solute transport in ground water in many hydrogeologic settings.

To download the complete set of MODPATH program files, check the box of the appropriate file below (either PC zip file or UNIX tar file) and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download MODPATH Program Files for 16-bit MS Windows (ZIP File)
File Size: 305429 bytes
File Date: Tue Sep 8 02:04:19 1998

Program files and source code for MODPATH (16-bit version).

Download MODPATH Program Files for 32-bit MS Windows (ZIP File)
File Size: 344327 bytes
File Date: Tue Jul 27 02:43:47 1999

Program files and source code for MODPATH (32-bit version).

Download MODPATH Program Files for UNIX-X Windows (Compressed TAR File)
File Size: 97925 bytes
File Date: Wed Jun 10 09:38:10 1998

After you have downloaded the file, perform the following steps:

1. Move the MODPATH tar file into your GMS directory.
2. Uncompress the MODPATH tar file by typing:

   uncompress modpath.tar

3. Untar the MODPATH tar file by typing:

   tar -xvf modpath.tar

4. Build the MODPATH executable by typing the following:

   cd mpsrc
   make

5. Delete the MODPATH tar file (optional).

To download the complete set of MT3D program files, check the box of the appropriate file below (either PC zip file or UNIX tar file) and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download MT3D Program Files for 16-bit MS Windows (ZIP File)
File Size: 270242 bytes
File Date: Tue Sep 8 02:04:38 1998

Program files and source code for MT3D (16-bit version).

Download MT3D Program Files for 32-bit MS Windows (ZIP File)
File Size: 289886 bytes
File Date: Mon Jun 7 11:04:09 1999

Program files and source code for MT3D (32-bit version).

Download Large Array Version MT3D Program Files for 32-bit MS Windows (ZIP File)
File Size: 229407 bytes
File Date: Thu Jun 17 14:40:35 1999

This MT3D executable has a storage array (X) of size 10,000,000 cells. The size of the standard version is 5,000,000 cells.

Download MT3D Program File for PEST and UCODE (ZIP File)
File Size: 231184 bytes
File Date: Fri Apr 16 11:11:35 1999

This is the MT3D executable which operates with PEST and UCODE (parameter calibration programs). It is different from the standard version in the sense that it can be called repeatedly and does not remain on the screen in a DOS session. This allows it to be called numerous times when re-running MT3D in calibrating a model.

Download MT3D Program Files for UNIX-X Windows
File Size: 73219 bytes
File Date: Wed Jun 10 09:38:10 1998

After you have downloaded the file, perform the following steps:

1. Move the MT3D tar file into your GMS directory.
2. Uncompress the MT3D tar file by typing:

   uncompress mt3d.tar

3. Untar the MT3D tar file by typing:

   tar -xvf mt3d.tar

4. Build the MT3D executable by typing the following:

   cd mtsrc
   make

5. Delete the MT3D tar file (optional).

To download the complete set of MT3D-MS program files, check the box of the appropriate file below (either PC zip file or UNIX tar file) and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download MT3D-MS 4.0 Program Files and Source Code for Modflow-2000 (ZIP File)
File Size: 378904 bytes
File Date: Thu Feb 7 13:24:11 2002

MT3DMS a modular three-dimensional multi-species transport model for simulation of advection, dispersion and chemical reactions of contaminants in groundwater systems. Detailed information on MT3D-MS can be found in the MT3D-MS Documentation and User Guide.

Download MT3D-MS 4.0 Program Files and Source Code for Modflow-88/96 (ZIP File)
File Size: 379222 bytes
File Date: Thu Feb 7 12:58:58 2002

MT3DMS a modular three-dimensional multi-species transport model for simulation of advection, dispersion and chemical reactions of contaminants in groundwater systems. Detailed information on MT3D-MS can be found in the MT3D-MS Documentation and User Guide.

To download the complete set of RT3D program files, check the box below and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download RT3D Program Files
File Size: 1459941 bytes
File Date: Wed Nov 4 15:22:22 1998

This ZIP file contains complete RT3D source code, executables, and documents.

To download the complete set of FEMWATER program files, check the box of the appropriate file below and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download FEMWATER Version 3.0 Executable File for 100,000 elements and 60,000 nodes (ZIP File)
File Size: 270410 bytes
File Date: Thu Dec 6 16:13:13 2001

Executable file for FEMWATER Version 3.0. Compiled to model up to 100,000 elements, 60,000 nodes, 25 material types, 25 wells, and 10 point sources of contamination.

Download FEMWATER Version 3.0 Executable File for 50,000 elements and 30,000 nodes (ZIP File)
File Size: 270128 bytes
File Date: Fri Oct 26 19:59:28 2001

Executable file for FEMWATER Version 3.0. Compiled to model up to 50,000 elements, 30,000 nodes, 15 material types, 25 wells, and 10 point sources of contamination.

Download FEMWATER Version 3.0 Source Code (ZIP File)
File Size: 497049 bytes
File Date: Fri Oct 12 16:58:22 2001

Source code files for FEMWATER Version 3.0. Requires Compaq Visual FORTRAN to compile.

Download FEMWATER Version 2.0 Program Files (ZIP File)
File Size: 502030 bytes
File Date: Thu Sep 2 10:49:37 1999

Program files and source code files for FEMWATER Version 2.0. Requires Compaq Visual FORTRAN to compile.

Download FEMWATER Version 1.0 Program Files (ZIP File)
File Size: 468127 bytes
File Date: Tue Sep 8 02:03:15 1998

Program files and source code files for FEMWATER Version 1.0. Requires Compaq Visual FORTRAN to compile.

Download FEMWATER Program Files for UNIX-X Windows (Compressed TAR File)
File Size: 446147 bytes
File Date: Tue Oct 3 15:45:13 2000

After you have downloaded the file, perform the following steps:

1. Move the FEMWATER tar file into your GMS directory.
2. Uncompress the FEMWATER tar file by typing:

   uncompress femwater.tar

3. Untar the FEMWATER tar file by typing:

   tar -xvf femwater.tar

4. Build the FEMWATER executable by typing the following:

   cd femwsrc
   make

5. Delete the FEMWATER tar file (optional).

To download the complete set of SEEP2D program files, check the box of the appropriate file below (either PC zip file or UNIX tar file) and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download SEEP2D Program Files for 16-bit MS Windows (ZIP File)
File Size: 192931 bytes
File Date: Tue Sep 8 02:05:00 1998

Program files and source code for SEEP2D (16-bit version).

Download SEEP2D Program Files for 32-bit MS Windows (Zip File)
File Size: 225507 bytes
File Date: Thu Sep 2 10:08:22 1999

Program files and source code for SEEP2D (32-bit version).

Download SEEP2D Program Files for UNIX/X Windows (Compressed TAR File)
File Size: 32413 bytes
File Date: Fri Aug 28 02:17:29 1998

After you have downloaded the file, perform the following steps:

1. Move the SEEP2D tar file into your GMS directory.
2. Uncompress the SEEP2D tar file by typing:

   uncompress seep2d.tar

3. Untar the SEEP2D tar file by typing:

   tar -xvf seep2d.tar

4. Delete the SEEP2D tar file (optional).
5. Compile the model.

To download the complete set of UCODE program files, check the box of the appropriate file below and click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download UCODE, a Computer Code for Universal Inverse Modeling
File Size: 2694651 bytes
File Date: Mon Apr 30 19:00:48 2001

UCODE is a computer code is designed to allow inverse modeling, posed as a parameter estimation problem, using existing application models. Although designed using groundwater models, the code can be used in conjunction with other application models that use ASCII or text only input, produce ASCII or text only output, and can be executed in batch mode. The performance of UCODE has been tested in a variety of applications. Future applications, however, might reveal errors that were not detected in the test simulations.

This self extracting ZIP file contains complete UCODE User Manuals.

By following the instructions below, you can successfully download the GMS version 3.1 models for UNIX.

Most of these model files contain the source files and the UNIX makefile. You can easily recompile the source code and create the executable on your UNIX systems.

After you have downloaded the tar file, perform the following steps:

1. Move the model tar file into your GMS directory.

2. Uncompress the GMS update tar file by typing:

   uncompress XX.tar

3. Untar the GMS model tar file by typing:

   tar -xvf XX.tar

   If you unpack the GMS model tar file successfully, a subdirectory forthe model will be created.

4. Delete the GMS update tar file (optional).

5. Compile the model.

To download the GMS version 3.0 Models for UNIX click on the appropriate link below and save the file to a temporary directory.

Most of these model files contain the source files and the UNIX makefile. You can easily recompile the source code and create the executable on your UNIX systems.

After you have downloaded the tar file, perform the following steps:

1. Move the model tar file into your GMS directory.

2. Uncompress the GMS update tar file by typing:

   uncompress XX.tar

3. Untar the GMS model tar file by typing:

   tar -xvf XX.tar

   If you unpack the GMS model tar file successfully, a subdirectory forthe model will be created.

4. Delete the GMS update tar file (optional).

5. Compile the model.

To download the following Network Hardware Lock Troubleshooting Utility, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. The following program will help you troubleshoot the network hardware lock.

Download Netinel Medic
File Size: 358009 bytes
File Date: Thu Feb 13 17:47:25 2003

The Netinel Medic is a utility created by Rainbow Technologies Technical Services Group to help you detect and prevent problems with your network configuration for testing and executing your Net Sentinel protected product.

To download a utility which can be used with MT3D-MS and MODFLOW, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links.

Download Save Last Step Utility
File Size: 140438 bytes
File Date: Thu Feb 7 13:10:56 2002

This program extracts the concentration in the last step from the unformatted concentration file [mt3dnnn.ucn], and saves it in a separate unformatted file as starting concentration for a continuation run.

Download Unformatted File Reader Utility
File Size: 154152 bytes
File Date: Thu Feb 7 13:10:52 2002

This program reads the unformatted concentration or head file saved by mt3dms/modflow, and the model grid configuration file, to create data files appropriate for use by Golden Software's contouring graphic package [SURFER] or 3D visualization package TECPLOT.

To download the following AVIiva AVI Program, click on the link below and save the program to a temporary directory. This shareware program can be used to play AVI files – files generated by GMS when doing filmloops. It is similar to the media player that comes with Windows but it has numerous additional features including the ability to adjust the playback speed.

DownloadAVIiva

To download the following BioChlor for 3-Dimensional Visualization, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links.

Download BC3D User Manual (PDF File)

File Size: 1851322 bytes
File Date: Fri Mar 3 04:53:45 2000

This document describes BioChlor and details how to use it.

Download BC3D Utility Program
File Size: 172356 bytes
File Date: Fri Mar 3 04:54:07 2000

BioChlor for 3-D is a FORTRAN utility package that solves a set of coupled partial differential equations to describe the reactive transport of chlorinated solvent species, such as PCE, TCE, DCE, VC and ETH, in saturated groundwater systems. The equations solved and the methods used are identical to those used in the AFCEE screening tool BIOCHLOR (Newell et al. 1998).

This utility package was specifically developed to complement the use of BIOCHLOR model for multi-dimensional applications. The main advantage of BC3D is that the code is conveniently interfaced with GMS, which help visualize true two- or three-dimensional plume patterns. The current version of BC3D depends exclusively on GMS to post-process output concentration distributions.

To download BIOSCREEN Natural Attenuation Decision Support System, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links.

Download BIOSCREEN User Manual (PDF File)

File Size: 1437995 bytes
File Date: Fri Mar 3 04:58:23 2000

This document describes BIOSCREEN, details how to use it, and has update information for version 1.4.

Download BIOSCREEN Program
File Size: 231974 bytes
File Date: Fri Mar 3 04:58:52 2000

BIOSCREEN is an easy-to-use screening model which simulates remediation through natural attenuation (RNA) of dissolved hydrocarbons at petroleum fuel release sites. The software, programmed in the Microsoft Excel spreadsheet environment and based on the Domenico analytical solute transport model, has the ability to simulate advection, dispersion, adsorption, and aerobic decay as well as anaerobic reactions that have been shown to be the dominant biodegradation processes at many petroleum release sites.

To download the following ESRI ArcExplorer GIS program, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download ESRI ArcExplorer version 3
File Size: 12483614 bytes
File Date: Sat May 12 02:06:39 2001

ArcExplorer version 3 is the latest Windows version of ESRI's complete, easy-to-use GIS data viewer. You can use it to display and query locally stored GIS data.

ArcExplorer version 3 offers many useful new features, including:

• Pan and zoom through multiple map layers
• Query spatial and attribute data
• Create a buffer around selected features
• Measure distances on a map
• Create map layers with one symbol, unique symbols, and graduated symbols
• Label map features, with many options for effects (such as highway shields)
• Locate an address
• Incorporate image formats (BMP, TIFF, PNG, JPG, and GIF)
• Save and retrieve projects
• Print maps
• Incorporate overview maps
• View legends and scale bars

Download ESRI ArcExplorer version 2
File Size: 13478006 bytes
File Date: Sat Sep 9 01:30:56 2000

ArcExplorer version 2 is ESRI's complete, easy-to-use GIS data viewer. You can use it to display and query locally stored GIS data.

ArcExplorer version 2 offers many useful features, including:

• Support for a wide range of image formats—ArcExplorer 2 supports image formats such as MrSID, JPEG, ADRG, ERDAS, GIF, TIFF, GeoTIFF, ArcInfo Grid, CIB, NITF, and many others.
• Support for military formats—Vector Product Format(VPF)
• Support for CAD formats—DXF, DWG, and DGN
• Support for ArcSDE 8.0.2—The newest version of ESRI'sSpatial Database Engine
• Support for address matching—Based on ESRI's MapObjects 2 geocoder (U.S. street address style)

With ArcExplorer, you can view the GIS coverages generated by GMS.

Download ESRI ArcExplorer User Guide

File Size: 1253355 bytes
File Date: Sat Feb 13 10:20:33 1999

The user guide is included in the ArcExplorer installation program and only needs to be downloaded separately if you are having installation problems.

Download ESRI ArcExplorer version 1.1 Import Utility
File Size: 1322869 bytes
File Date: Sat Feb 13 10:09:18 1999

The ArcExplorer Version 1.1 Import Utility converts ArcInfo interchange files ".e00" into ArcInfo coverages, which then can be used in ArcExplorer.

To download the following GMS PEST Utilities, check the box below and then click on the "Download Selected" button. An e-mail will then be sent to you with the download link.

Download GMS PEST Utilities
File Size: 1552784 bytes
File Date: Fri Mar 5 10:18:02 1999

The GMS PEST Utilities are a set of programs which facilitate the use of PEST in the GMS 2.1 and 3.0 environment. They are designed to enhance the model calibration functionality already built into GMS by automating construction of PEST input files based on the contents of observation coverages accessed through the GMS map module (versions 2.1 and later).

Note: Direct support for PEST is provided in GMS 3.1.

To download the following File Comparison Utility, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

Comparator
File Size: 520324 bytes
File Date: Tue Jan 29 17:36:33 2002

Comparator is a cool power utility that will take away the tedium of finding, deleting and copying over duplicate files. With Comparator you will no longer need to open two Explorer windows to make painstaking comparisons between directories.

Comparator is an alternative to the Microsoft Briefcase, so install this FREE program everywhere you go to keep your files in sync.

To download the following Unit Conversion Utility, check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download link.

Download Convert (Unit Conversion) Utility
File Size: 171752 bytes
File Date: Thu Mar 18 11:42:51 1999

This easy-to-use unit conversion program will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, including the ability to create custom conversions!

This utility was developed by Josh Madison.

To download the following AVI merging utility, check the box below and click on the "Download Selected" button. An e-mail will be sent to you with the download link.

Download AVI Merging Utility
File Size: 33966 bytes
File Date: Tue Sep 8 15:42:29 1998

This is a simple utility program that can be run on Microsoft Windows. It can be used to combine several AVI files into one. It is useful for simultaneous viewing of multiple filmloops. The zip file consists of the program executable and a short MS Word file containing a brief explanation.

To download the following DEM utilities, check the box of the desired utilities you want and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

Download SDTS DEM to ArcInfo Grid Conversion Program
File Size: 227090 bytes
File Date: Mon Aug 3 14:55:05 1998

This program converts SDTS DEM files to a ArcInfo ASCII grid import data file.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS DEM to DEM Conversion Program
File Size: 237144 bytes
File Date: Wed Aug 5 09:27:25 1998

This program converts SDTS DEM files to a data file which is a reconstruction of the original DEM source file.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS DEM to DLG3 Conversion Program
File Size: 277366 bytes
File Date: Fri May 1 15:00:15 1998

This program converts an SDTS file to a data file which is a reconstruction of the original DLG3 optional source file.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS Conversion Program
File Size: 212418 bytes
File Date: Mon Aug 3 14:59:16 1998

This program converts SDTS records interactively one at a time. Output goes to both the computer screen/window and an optional report file on disk.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS DEM to DXF Conversion Program
File Size: 248766 bytes
File Date: Mon Aug 3 14:56:31 1998

This program converts an SDTS file to a data file which is DXF compatible.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS DEM to MapInfo Exchange Format Conversion Program
File Size: 248726 bytes
File Date: Mon Aug 3 14:57:18 1998

This program converts an SDTS line file to a data file which is compatible with MapInfo. It creates a MIF file of coordinates and a MID file with line record # and attribute record #.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS DEM to IDRISI VEC Conversion Program
File Size: 259000 bytes
File Date: Mon Aug 3 14:57:57 1998

This program converts SDTS files to a format that Idrisi can read.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

Download SDTS DEM to Surfer Conversion Program
File Size: 227612 bytes
File Date: Mon Aug 3 14:58:40 1998

This program converts SDTS DEM files to a Surfer ASCII grid import data file.

This program was developed by Sol Katz of U.S. Bureau of Land Management.

To download the following USGS Digital Cartographic Data Viewer, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

Download dlgv32 USGS Digital Cartographic Data Viewer
File Size: 3143950 bytes
File Date: Sun Sep 23 01:29:16 2001

dlgv32 is Windows software for viewing a variety of digital cartographic data.

The following spatial data products can be displayed in dlgv32 v3.6:

• USGS digital line graph, optional format (DLG-O)
• USGS digital line graph, Spatial Data Transfer Standard format (DLG/SDTS)
• USGS digital elevation model (DEM)
• USGS digital elevation model, Spatial Data Transfer Standard format (DEM/SDTS)
• USGS digital elevation model, GeoTIFF format
• USGS digital raster graphic (DRG), GeoTIFF format
• USGS digital orthophoto quads (DOQ), GeoTIFF format
• Global 30-arc-second digital elevation data (GTOPO30)
• NOAA DSDATA geodetic control, SDTS format
• NOAA Terrain Base elevation data
• Canadian Digital Elevation Data (CDED)

To download the following data manipulation programs, check the box of the desired utilities below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

Download Borehole Data File Convertor
File Size: 11702 bytes
File Date: Sat Jun 29 14:00:26 2002

This is an Excel VBA macro that converts a comma delimited file ("x,y,z, material ID") to GMS borehole file format.

Download GMS 2D Mesh to SUTRA Converter Utility
File Size: 10188 bytes
File Date: Tue Sep 30 02:01:07 1997

This short Perl script will convert GMS 2D mesh files (xxx.2dm) to input files for the USGS code, SUTRA (Voss, 1984). The user is responsible for making a mesh entirely out of linear quadrilateral elements and for putting the fluid and material property values into the script.

Download GMS_FLUX Utility
File Size: 9292 bytes
File Date: Tue May 19 02:05:00 1998

GMS_FLUX is a FORTRAN program which will read FEMWATER 3D geometry and velocity files and compute the flow rate through a specified VERTICAL boundary. This does not return the flux through the top or bottom.

Contributed by:
Bob Evans
USACE Jacksonville
Email: Robert.A.Evans@SAJ02.usace.army.mil

Download GMS_FLUX_TOP Utility
File Size: 6110 bytes
File Date: Wed May 20 02:00:13 1998

GMS_FLUX_TOP is a FORTRAN program which computes the flow rate throughout the TOPS of elements specified. It could be easily modified to compute flow through the bottoms.

Contributed by:
Bob Evans
USACE Jacksonville
Email: Robert.A.Evans@SAJ02.usace.army.mil

Download GMS_TRACE v3.1 FEMWATER Particle Tracking Utility
File Size: 10829 bytes
File Date: Thu May 21 02:00:26 1998

GMS_TRACE is a companion program to the three-dimensional, finite-element groundwater model, FEMWATER. The purpose of GMS_TRACE is to allow the user to track the flow of particles through the model domain using the hydrodynamics from FEMWATER. A user manual is also provided.

Contributed by:
Bob Evans
USACE Jacksonville
Email: Robert.A.Evans@SAJ02.usace.army.mil

Download GMS DEM Utility v2.0
File Size: 82782 bytes
File Date: Tue Nov 4 02:10:28 1997

This program will read in an ASCII data file (for example, DEM or Digital Elevation Map files) that consists of XYZ coordinates. The program will cut the XYZ coordinate file up into a user-defined rectangular section. It will read in the XYZ data, then ask the user what range for X & Y is desired. The program will then create a new ASCII data file based on the inputted range.

The user can choose to create files that GMS can read. This includes 3D scatter, scalar, and TIN files. The headers are automatically written to the new file so that it can be immediately imported into GMS without any conversion or editing.

The FORTRAN source code is included with this program.

Contributed by: David Heebner

To download the following Hardware Lock Driver Installation program, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link. The following program will install the hardware lock driver.

Download Hardware Lock Driver Installation Program
File Size: 4998680 bytes
File Date: Tue Jun 1 19:21:37 2004

This program will install the appropriate drivers for both single-user workstation hardware locks and multi-user network hardware locks.

To download the following GMS 2.1 Instructional Problems, check the box of the desired file below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

Download GMS 2.1 Supplemental Problems
File Size: 3538175 bytes
File Date: Sun Nov 9 12:08:35 1997

These exercises will help to familiarize you with GMS.

To download the following USGS MODFLOW Instructional Problems, check the box of the desired files below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links.

Download USGS MODFLOW Instructional Problems Manual (PDF File)

File Size: 5482152 bytes
File Date: Thu Apr 18 16:34:47 2002

This manual is intended to provide a curriculum that allows the user to have hand-on experience with the practical application of models using GMS.

Twenty documented problems, complete with problem statements, input data sets, and discussion of results are presented. The problems are designed to cover modeling principles, specifics of input/output options available to the modeler, rules of thumb, and common modeling mistakes.

Download USGS MODFLOW Model Instructional Problems (ZIP File)
File Size: 3997414 bytes
File Date: Tue Jun 2 19:41:44 1998

This zip file contains twenty instructional problems described in the USGS MODFLOW Instructional Problems Manual (PDF File). These files are setup for running using GMS.

To download the following MT3D-MS example files, check the box of the desired files below and then click on the "Download Selected" button. An e-mail will be sent to you with the download links.

Download Example Problem 7.7 in the MT3D-MS User Manual for use with Modflow-88/96
File Size: 50060 bytes
File Date: Thu Feb 7 13:24:18 2002

An MT3D-MS example problem demonstrating three-dimensional transport in a uniform flow field.

Download Example Problem 7.7 in the MT3D-MS User Manual for use with Modflow-2000
File Size: 48514 bytes
File Date: Thu Feb 7 12:59:00 2002

An MT3D-MS example problem demonstrating three-dimensional transport in a uniform flow field.

Download Example Problem for Section 7.8 of MT3D-MS User Manual
File Size: 60076 bytes
File Date: Fri Oct 29 03:01:14 1999

A MT3D-MS example problem demonstrating two-dimensional, vertical transport in a heterogeneous aquifer.

Download Example Problem for Section 7.9 of MT3D-MS User Manual
File Size: 20011 bytes
File Date: Fri Oct 29 03:01:16 1999

A MT3D-MS example problem demonstrating the transport of contaminants in a two-dimensional heterogeneous aquifer in plan view.

Download Example Problem for Section 7.10 of MT3D-MS User Manual
File Size: 278499 bytes
File Date: Fri Oct 29 03:01:06 1999

A MT3D-MS example problem demonstrating the evaluation of the effectiveness of proposed groundwater remediation schemes.

To download the following GMS 2.1 SEEP2D example files, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

Download GMS 2.1 SEEP2D Module Instructional Problems
File Size: 131402 bytes
File Date: Mon Dec 8 09:28:53 1997

Additional Instructional problems to be modeled with SEEP2D.

To download the following FEMWATER example files, check the box below and then click on the "Download Selected" button. An e-mail will be sent to you with the download link.

Download FEMWATER Salt Water Intrusion Data
File Size: 949170 bytes
File Date: Wed Oct 3 16:09:33 2001

This ZIP file contains the example files used in the FEMWATER salt water intrusion tutorial exercise. These example files should be used with the FEMWATER Salt Water Intrusion Tutorial PDF, which is located here

Download FEMWATER Instructional Problems
File Size: 510337 bytes
File Date: Wed Jul 23 09:40:06 1997

These are typical examples of FEMWATER which one might pattern new applications of the model. Five examples are provided that demonstrate different capabilities of FEMWATER. A complete discussion of each example is provided within the FEMWATER Reference Manual.

1. Steady State Wellhead Protection Example.

2. Transient Confined Disposal Example.

3. Transient Groundwater Remediation Example.

4. Transient Chemical Spill Example.

5. Transient Salinity Intrusion Example.