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  • Stormwater Control Facilities Technical Document

    To download Stormwater Control Facilities Technical Document PDF, 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 Stormwater Control Facilities Technical Document (PDF File)
    File Size: 1336013 bytes
    File Date: Wed Apr 9 09:24:02 2008

     

    This 46 page technical document provides an overview of structural stormwater controls such as detention ponds, wetlands, bioretention areas, sand filters, and swales. Structural stormwater controls are engineered facilities designed to treat stormwater runoff and/or mitigate the effects of increased stormwater runoff peak rate, volume, and velocity due to urbanization. This design document is from the Georgia Stormwater Management Manual.

  • Stormwater Best Management Practices

    To download Stormwater Best Management Practices PDF, 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 Stormwater Best Management Practices (PDF File)
    File Size: 494705 bytes
    File Date: Fri Aug 24 07:57:13 2007

  • Manning's Roughness Coefficients

    To download Manning's Roughness Coefficients Guide PDF, 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 Verified Roughness Characteristics of Natural Channels Guide (PDF File)
    File Size: 5283414 bytes
    File Date: Thu Oct 28 11:47:51 2004

    Download Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains (PDF File)
    File Size: 3593796 bytes
    File Date: Fri Sep 22 06:36:11 2006

    Download Guide for Selecting Manning's Roughness Coefficients (PDF file)
    File Size: 6551792 bytes
    File Date: Wed Jul 18 09:28:04 2007

     

    Most hydraulic computations related to estimates of discharge require an evaluation of the roughness characteristics of the channel and overbanks. Due to the absence of a satisfactory quantitative procedure, this evaluation remains chiefly an art. The ability to evaluate roughness coefficients must be developed through experience.

    One means of gaining this experience is by examining and becoming acquainted with the appearance of some typical channels and overbanks whose roughness coefficients are known.

  • Detour Drainage Structure Design Procedure

    To download Detour Drainage Structure Design Procedure PDF, 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 Detour Drainage Structure Design Procedure Technical Document (PDF file)
    File Size: 8244237 bytes
    File Date: Wed Jun 6 10:59:07 2007

     

    This 205-page technical document from Colorado Department of Transportation Research Branch, proposes two new detour drainage structure design methodologies. The objective of the document is to develop a statewide detour drainage structure design procedure that also considers environmental impacts and mitigation measures.
  • General Infiltration Practices

    To download General Infiltration Practices PDF, 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 General Infiltration Practices Technical Document (PDF file)
    File Size: 1064998 bytes
    File Date: Wed May 2 10:09:02 2007

     

    This 56-page document provides design criteria and procedures for general infiltration practices such as infiltration basin, infiltration trench, roof downspout system, and porous pavement. Infiltration facilities temporarily impound stormwater runoff and discharge it via infiltration into the surrounding soil. Infiltration practices are appealing in that they help to reverse the hydrologic consequences of urban development by reducing peak discharge and providing groundwater recharge. Infiltration facilities are primarily used for water quality enhancement.
  • Stormwater Detention Pond Design Document

    To download Stormwater Detention Pond Design Document PDF, 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 Stormwater Detention Pond Design Technical Document (PDF file)
    File Size: 323129 bytes
    File Date: Fri Mar 30 05:17:31 2007

     

    This technical document provides you with a working exercise of how to design a residential site development stormwater detention pond. It shows you how to compute the pre-development and post-development peak discharges and the required stormwater storage volumes. In addition, it covers locating and sizing the pond, as well as developing a grading plan. This design document is from the Georgia Stormwater Management Manual.
  • Stormwater Detention Pond Design

    To download Stormwater Detention Pond Design Technical Document PDF, 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 Stormwater Detention Pond Design Technical Document (PDF file)
    File Size: 2095888 bytes
    File Date: Wed Feb 28 08:08:15 2007

     

    This document from Minnesota Pollution Control Agency focuses on the application of stormwater ponds as a best management practice (BMP) for improving the quality of urban runoff and reducing peak discharges. Stormwater ponds have become the most common “structural” method of regulating and treating stormwater runoff.

    This technical document describes the design of stormwater ponds. Many municipalities and watershed districts require stormwater ponds to mitigate the adverse impacts of urbanization.

  • Biofilters and Bioswales

    To download Biofilters Technical Document and Sample Bioswale Design Report PDF, 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 Biofilters Technical Document (PDF file)
    File Size: 4493568 bytes
    File Date: Wed Jan 31 07:25:58 2007

    Download Sample Bioswale Design Report (PDF file)
    File Size: 4056419 bytes
    File Date: Wed Jan 31 07:26:51 2007

     

    Biofilters and bioswales are landscape elements designed to remove silt and pollution from surface runoff. Bioswales typically consist of a swaled drainage course filled with vegetation, compost, and/or riprap. They are designed to maximize the time water spends in them, aiding the trapping of silt and pollutants. A common application is around parking lots, which are used treat the parking lot runoff before releasing it to the watershed or storm sewer.

    The following two documents provide excellent information on the design, construction, implementation, and maintenance of bioswales and other biofilter elements. These documents provide a practical approach for the stormwater engineer, allowing him to quickly implement these design elements into his engineering project designs.

  • Floodplain Modeling Manual

    To download Floodplain Modeling Manual PDF, 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 Floodplain Modeling Manual (PDF file)
    File Size: 2134504 bytes
    File Date: Fri Dec 22 09:07:36 2006

     

    Published by Federal Emergency Management Agency (FEMA), this 78-page manual introduces HEC-RAS 3.0 modeling procedures to engineers who have experience in preparing floodplain models using HEC-2.

    The Floodplain Modeling Manual provides:

     

    • Discussion on issues relevant to modeling floodplains obstructed and unobstructed by structures
    • Summarizes HEC-RAS features that can be used in modeling complex floodplains such as multiple bridges, culverts in series, flow junctions, and split flow
    • Summarizes quality assurance software CHECK-2 and CHECK-RAS
    • Discussion on issues related to the general development of the HEC-RAS Model
    • FEMA's guidance on using HEC-RAS for flood insurance studies

    The hydraulic principles and computational procedures used in HEC-RAS and HEC-2 are summarized in this manual, and the differences are identified.

  • Culvert Inspection Manual

    To download Culvert Inspection Manual PDF, 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 Culvert Inspection Manual (PDF file)
    File Size: 22132688 bytes
    File Date: Thu Nov 30 10:33:12 2006

     

    Published by the U.S. Department of Transportation (in association with the Federal Highway Administration), this Culvert Inspection Manual is a supplement to the Bridge Inspector’s Training Manual (see our November 2003 newsletter). Since culverts are less visible than bridges, they have traditionally received less attention. However, culverts too need to be inspected regularly to identify potential safety problems, maintenance needs or other actions required to preserve the investment in the structure and to minimize property damage due to improper hydraulic functioning. This 200-page manual provides procedures for conducting and documenting culvert inspections with specific guidelines for inspecting and evaluating the major hydraulic and structural components of culverts. Discussions on the hydraulic, structural, and durability performance of culverts are also included. Information is provided on personnel qualifications, equipment, and safety procedures required for conducting culvert inspections. These procedures should be of interest to hydraulic and bridge-maintenance engineers, technicians, and inspectors.
  • Engineering and Design of Conduits, Culverts, and Pipes

    To download Engineering and Design of Conduits, Culverts, and Pipes PDF, 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 Engineering and Design of Conduits, Culverts, and Pipes (PDF file)
    File Size: 3214927 bytes
    File Date: Tue Oct 31 06:07:28 2006

     

    Published by the U.S. Army Corps of Engineers (USACE), this Engineering and Design Manual provides Guidance on the design and construction of culverts, stormwater pipes, and other conduits and design procedures for trench/embankment earth loadings, highway loadings, railroad loadings, surface concentrated loadings, and internal/external fluid pressures. This 87-page manual covers the following topics: Cast-in-place conduits for dams, Circular reinforced concrete pipe for small dams and levees, Corrugated metal pipe for rural levees and culverts, Concrete culverts, Plastic pipe for other applications, Ductile iron pipe and steel pipe for other applications, and Pipe jacking. Being from the Army Corps of Engineers, this manual covers nearly every aspect to the engineering and design of culverts, stormwater pipes, as well as other conduits.
  • Modern Sewer Design

    To download Modern Sewer Design PDF, 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 Modern Sewer Design (PDF file)
    File Size: 2790835 bytes
    File Date: Fri Sep 29 10:05:16 2006

     

    Published by the American Iron and Steel Institute (AISI), this technical document concisely presents current technology and the application of steel storm sewers. It is considered the bible for design, construction, rehabilitation, and maintenance of modern steel sewers. It includes both US and metric (SI) units. A thoroughly reviewed and updated source of information, this document is recommended for experienced practitioners as well as beginners alike.
  • Culvert Design

    To download Culvert Design PDF, 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 Culvert Design (PDF file)
    File Size: 1520233 bytes
    File Date: Thu Aug 31 08:17:44 2006

     

    Culverts are used to convey water across highways, railroads, and other embankments. They are available in a variety of shapes, sizes, and materials, all of which affect their capacity and overall performance. Culvert design involves both hydraulic and structural design considerations. Structural design includes load carrying during construction, as well as highway, railroad, or other traffic and earth loads. As culverts significantly influence upstream and downstream flood risks, floodplain management, and public safety, a careful approach to their design is crucial, both in new land development and retrofit situations. This month’s technical document discusses the hydraulic aspects of culvert design. This 62-page document is from Volume 2 of the Drainage Criteria Manual of Urban Drainage & Flood Control District.
  • Hydraulic Structures

    To download Hydraulic Structures, 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 Hydraulic Structures (PDF file)
    File Size: 4716847 bytes
    File Date: Thu Jul 27 09:12:52 2006

     

    Used to divert, restrict, stop, or otherwise manage the natural flow of water, hydraulic structures abound today. Methodical hydraulic engineering, coupled with environment considerations, as well as ecological and public safety objectives, need to be integrated for hydraulic structures. The proper application of hydraulic structures can reduce initial and future maintenance costs by managing the character of the flow to fit the environmental and project needs. This 126-page document is from Volume 2 of the Urban Storm Drainage Criteria Manual of the Urban Drainage & Flood Control District, Denver, CO.
  • Planning and Designing of Major Drainage Systems

    To download Planning and Designing of Major Drainage Systems, 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 Planning and Designing of Major Drainage Systems (PDF file)
    File Size: 4234561 bytes
    File Date: Wed Jun 28 09:20:11 2006

     

    Major drainage infrastructure is the cornerstone of an urban runoff system. A major drainage system may include many features such as natural and artificial channels, culverts, long underground conduits and outfalls, streets, and property line drainage easements. It is closely allied to, but separate from the initial drainage system consisting of storm sewers, curbs and gutters, and minor drainageways. This month’s technical document on major drainage systems addresses various topics related to planning of major drainage systems, open channel design principles, and open channel design criteria. This document has been extracted from the Urban Storm Drainage Criteria Manual for the City of Denver.
  • Advanced HEC-RAS Modeling Techniques

    To download Advanced HEC-RAS Modeling Techniques, 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 Advanced HEC-RAS Modeling Techniques (PDF file)
    File Size: 1559131 bytes
    File Date: Tue May 23 06:36:42 2006

     

    This document by the Arizona Department of Water Resources, Dam Safety Section, provides the HEC-RAS modeler with some advanced techniques that can be used for modeling floodplains, bridges, culverts, weirs, and other hydraulic structures. It can be used as another source for technical documentation, in addition to the HEC-RAS reference manual provided by the U.S. Army Corps of Engineers.
  • The Use of Best Management Practices (BMPs) in Urban Watersheds

    To download The Use of Best Management Practices (BMPs) in Urban Watersheds, 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 The Use of Best Management Practices (BMPs) in Urban Watersheds (PDF file)
    File Size: 14577457 bytes
    File Date: Thu Apr 27 10:18:38 2006

     

    The purpose of this document is to provide a general description and insight on the various BMP options, the design considerations involved and the general guidelines for selection, implementation, and monitoring of BMPs to reduce pollutants in urban stormwater from new development and re-development.
  • Storm Water Management Fact Sheet: Water Quality Inlets

    To download the Storm Water Management Fact Sheet: Water Quality Inlets, 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 Storm Water Management Fact Sheet: Water Quality Inlets (PDF file)
    File Size: 78359 bytes
    File Date: Wed Mar 29 08:45:22 2006

     

    Water Quality Inlets (WQI) consist of a series of chambers, typically a sedimentation chamber, an oil separation chamber, and a discharge chamber, that promote sedimentation of coarse materials and separation of free oil from stormwater. These are often used where land requirements and cost prohibit the use of larger BMP devices, such as ponds or wetlands. One of the main advantages of WQI is that it can provide spill control. All the advantages and disadvantages are discussed in this PDF document along with the applicability, design criteria and the chamber designs.
  • Storm Water Management Fact Sheet: On-Site Underground Retention/Detention

    To download the Storm Water Management Fact Sheet: On-Site Underground Retention/Detention, 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 Storm Water Management Fact Sheet: On-Site Underground Retention/Detention (PDF file)
    File Size: 4277913 bytes
    File Date: Tue Feb 28 06:22:03 2006

     

    Each material has its own advantages and disadvantages and specific applicability. In this month’s Fact Sheet, you will learn about the On-site underground retention/detention system. It accomplishes the capture and storage of stormwater collected from surrounding impervious areas and provides minimal stormwater quality benefits, but can be a successful segment to a development’s overall stormwater management plan, when coupled in-line with other stormwater BMPs. This system is ideal for use under parking lots, roadways and paved areas associated with commercial, industrial and residential developments. This fact sheet describes the design criteria and its performance.
  • Storm Water Management Fact Sheet: Sand Filters

    To download the Storm Water Management Fact Sheet: Sand Filters, 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 Storm Water Management Fact Sheet: Sand Filters (PDF file)
    File Size: 108403 bytes
    File Date: Tue Jan 24 01:13:44 2006

     

    Sand filters remove particulates in both the sedimentation and the filtration chambers. A typical sand filter system consists of two or three chambers or basins. The first is the sedimentation chamber, which removes floatable and heavy sediments. The second is the filtration chamber, which removes additional pollutants by filtering the runoff through a sand bed. The third is the discharge chamber. This fact sheet in PDF format also emphasizes on the three main sand filter designs currently in common use: the Austin sand filter; the Washington, D.C., sand filter; and the Delaware sand filter. The primary differences among these designs are location (i.e., above or below ground), the drainage area served, their filter surface areas, their land requirements, and the quantity of runoff they treat.
  • Storm Water Management Fact Sheet: Minimizing Effects from Highway Deicing

    To download the Storm Water Management Fact Sheet: Minimizing Effects from Highway Deicing, 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 Storm Water Management Fact Sheet: Minimizing Effects from Highway Deicing (PDF file)
    File Size: 234875 bytes
    File Date: Mon Dec 19 02:44:54 2005

     

    Highway ice and snow removal is essential both to public safety and to local and interstate commerce. Many initiatives have been taken to control ice and snow on roadways while minimizing any associated environmental effects. This fact sheet in PDF format emphasizes the methods and practices for snow removal that are feasible and cost effective for local governments to implement and that are also consistent with sound environmental quality goals. The goal of this research has been to minimize the environmental effects of deicing while still providing a cost effective means of clearing roadways for safe travel.
  • Basin Best Management Practices Manual

    To download the Basin Best Management Practices Manual, 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 Basin Best Management Practices Manual (PDF file)
    File Size: 4472206 bytes
    File Date: Thu Oct 5 06:50:54 2006

     

    This 122-page U.S. Environmental Protection Agency document is the third volume of the manual Stormwater Best Management Practice Design Guide. It provides guidance on the design of best management practices (BMPs) for the mitigation of the environmental impacts to receiving waters associated with urban runoff. Water resources engineers have designed small and large ponds for many years for a wide range of applications, including farm ponds, recreational ponds, water supply reservoirs, flood control reservoirs, infiltration basins and multiple use reservoirs. This volume provides design guidelines for a group of stormwater management (SWM) BMPs broadly referred to as basins or ponds. The objectives of this manual is to provide practical design guides that when followed, result in SWM BMPs facilities that maximize pollutant removal and flood control.
  • Wetlands Design Manual

    To download the Wetlands Design Manual, 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 Wetlands Design Manual (PDF file)
    File Size: 999863 bytes
    File Date: Thu Oct 27 10:17:05 2005

     

    This technical document discusses the construction of an artificial ecosystems and wetlands as a functional part of wastewater treatment. This allows innovative processes for wastewater treatment as a "water pollution control" with the production of useful resources rather then a liability. The later section of the document concerning constructed wetlands focuses on studies of pilot and full-scale systems and discussion of aquatic plant systems concentrates on the results with water hyacinth systems.
  • Stormwater Management

    To download the Stormwater Management document, 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 Stormwater Management Document (PDF file)
    File Size: 808801 bytes
    File Date: Mon Sep 19 23:03:05 2005

     

    This is a 187 page handbook issued by MA Department of Environmental Protection and MA Office of Coastal Zone Management on Stormwater Management. This handbook covers hydrology and stormwater runoff, site planning, and best management practices.
  • Bridge Engineering

    To download the Bridge Engineering document, 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 Bridge Engineering Document (PDF file)
    File Size: 336167 bytes
    File Date: Mon Aug 29 03:27:08 2005

     

    In this paper the status of bridge engineering at the end of the 20th century in the area of general transportation structures is summarized. The focus is on bridge structure types, design aspects, new materials, aesthetic concerns, and key policy issues. An attempt is made to forecast the status of bridge engineering 20 to 30 years into the next millennium; the paper is written as though these forecasts will become a reality.
  • Design of Riprap Revetment Documentation

    To download the HEC 11 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.

    Download Riprap Revetment Documentation (PDF file)
    File Size: 3713101 bytes
    File Date: Thu Jul 24 09:19:03 2008

     

    The Hydraulic Engineering Circular No. 11 (HEC-11) document entitled "Design of Riprap Revetment" is available for you to download. This document includes discussions on recognizing erosion potential, erosion mechanisms and riprap failure modes, and riprap types including rock, rubble, gabions, preformed blocks, grouted rock, and paved linings. Design concepts covered include design discharge, flow types, channel geometry, flow resistance, extent of protection, and toe depth. Detailed design guidelines are presented for rock riprap, and design procedures are summarized in charts and examples. This document also presents design guidance for wire-enclosed rock (gabions), precast concrete blocks, and concrete-paved linings.
  • Urban Hydrologic Procedures Documentation

    To download the following technical document, 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 Urban Hydrologic Procedures (PDF File)
    File Size: 677527 bytes
    File Date: Tue May 25 10:55:15 2004

     

    This document is an excerpt from the Urban Drainage Design Manual produced by the U.S. DOT in 1996. In this chapter, urban hydrologic procedures are discussed. Specific topics covered include rainfall distribution, peak flow rate determination, time of concentration, and developing a design hydrograph. Example equations and clear tables and figures make this document a handy reference for the practicing hydrologist or civil engineer.
  • FEMA Study Guidelines

    To download the following technical document, 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 5.0 PDF format.

    FEMA Study Guidelines (PDF File)
    File Size: 513134 bytes
    File Date: Tue Feb 1 09:21:14 2005

     

    The Federal Emergency Management Agency (FEMA) has compiled the Flood Insurance Study Guidelines and Specifications to define the technical policy and procedures that must be used in preparation of FIS, restudies, and LMMP projects. Adherence to these guidelines is required in Contract Statements of Work and performance in accordance with these guidelines is required of any contractor preparing a FIS, restudy, or revision. Tables like the one below help study contractors standardize every element of the study, including standards for surveying data, specifications for displaying digital map data, and rules for process quality control.
  • SDTS to DEM Converter

    To download the SDTS to DEM Converter (for PCs), check the box below and then click the "Download Selected" button. An e-mail will be sent to you with the download links.

    Download the SDTS to DEM Converter (for PCs)
    File Size: 237144 bytes
    File Date: Fri Sep 22 11:04:05 2006

     

    One of the major challenges to dealing with mounds and mounds of inherited digital terrain data is that it's not always in a uniform format. Heck, (or should I say, "HEC") it's not always even usable. This particular utility, developed by Sol Katz of U.S. Bureau of Land Management, will convert SDTS data to DEMs using easy-to-follow onscreen instructions. Other conversion utilities available on BOSS International 's site include SDTS to Surfer, SDTS to ArcInfo, and many others. Click on the link below to be taken to the page.
  • Structural Design Manual for Improved Inlets and Culverts

    To download the following technical document, 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 5.0 PDF format.

    Structural Design Manual for Improved Inlets and Culverts (PDF File)
    File Size: 9493624 bytes
    File Date: Wed Dec 22 09:28:21 2004

     

    This manual from the Federal Highway Administration provides structural design methods that improve hydraulic flow in culverts, particularly for inlets having specific configurations. Design methods and typical details for the component structures found in improved inlets, such as wing walls, headwalls, aprons, and the inlet itself, are also presented in this Manual. These methods cover inlets to reinforced concrete pipe, reinforced concrete box sections, and corrugated metal pipe. Considerations also apply to the design of culvert barrels for each of the above conduit types.
  • Hydraulics of Bridge Waterways

    To download the following technical document, 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 5.0 PDF format.

    Download Hydraulics of Bridge Waterways (PDF File)
    File Size: 4581040 bytes
    File Date: Thu Nov 18 13:52:37 2004

     

    This document intends to provide a means of determining the effect of a given bridge on the flow of a stream. Released by the Department of Transportation as part of their Hydraulic Design Series, the manual provides detailed derivations and illustrative examples of some of the most common bridge calculations. Topics covered include hydraulic fundamentals as well as advanced material, such as backwater computation, abnormal stage-discharge conditions, flow through critical depth, and many others.
  • Manning Value Documentation

    To download the following technical document, 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 5.0 PDF format.

    Download Verified Roughness Characteristics (PDF File)
    File Size: 5283414 bytes
    File Date: Thu Oct 28 11:47:51 2004

     

    Most hydraulic computations related to estimates of discharge require an evaluation of the roughness characteristics of the channel. Due to the absence of a satisfactory quantitative procedure, this evaluation remains chiefly an art. The ability to evaluate roughness coefficients must be developed through experience. One means of gaining this experience is by examining and becoming acquainted with the appearance of some typical channels whose roughness coefficients are known. This document contains photographs and data for a wide range of channel conditions that can be used to select roughness coefficients for other natural channels.
  • Pump Stations Documentation

    To download the following technical document, 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 Pump Stations (PDF File)
    File Size: 873989 bytes
    File Date: Tue Sep 28 14:49:03 2004

     

    The fifth and final installment of our series on urban drainage design deals with the design, operation, and maintenance of pump stations. Specific topics covered in this downloadable document from the U.S. Department of Transportation include design considerations, station types, pump rate & storage volume, ventilation, and others. The document contains numerous graphs and tables to help illustrate concepts as well as a step-by-step design example.
  • Storm Drains Documentation

    To download the following technical document, 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 Storm Drains (PDF File)
    File Size: 1257043 bytes
    File Date: Thu Aug 26 10:14:45 2004

     

    The fourth installment of BOSS International 's summer-long urban drainage series dives into the realm of storm drain theory and design. This document from the U.S. Department of Transportation goes to great lengths to review subjects like hydraulic capacity, grade lines, transition losses, the relative flow effect, and many others. Complete with helpful illustrations and step-by-step design examples, this document serves as a handy reference for students and professionals alike.
  • Roadside and Median Channels Documentation

    To download the following technical document, 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 Roadside and Median Channels (PDF File)
    File Size: 478359 bytes
    File Date: Mon Jul 26 10:47:52 2004

     

    The third installment of Civil Engineering Today’s summer-long series on Urban Drainage deals with the issue of roadside and median channel runoff. This chapter of the Urban Drainage Design Manual discusses the both the underlying concepts behind the design of channels, such as conservation of energy and flow resistance, as well as procedural implementation guidelines. The strengths of this Roadside and Median Channels documentation are the many clearly explained equations and example scenarios.
  • Pavement Drainage Documentation

    To download the following technical document, 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 Pavement Drainage (PDF File)
    File Size: 1583205 bytes
    File Date: Tue Jun 15 12:44:28 2004

     

    Continuing with what has turned into a summer-long series on various urban drainage issues, this document from the U.S. Department of Transportation's Urban Drainage Design Manual focuses on the design of pavement drainage. In this chapter, contributing engineers discuss the reasons for proper pavement drainage and the hazards that can result from poor hydrological design. Specific topics covered include surface drainage, gutter flow, inlet capacity, and grate type considerations. Sample equations and detailed diagrams make this document a handy reference for civil engineers involved in pavement drainage design.
  • Urban Hydrologic Procedures Documentation

    To download the following technical document, 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 Urban Hydrologic Procedures (PDF File)
    File Size: 677527 bytes
    File Date: Tue May 25 10:55:15 2004

     

    This document is an excerpt from the Urban Drainage Design Manual produced by the U.S. DOT in 1996. In this chapter, urban hydrologic procedures are discussed. Specific topics covered include rainfall distribution, peak flow rate determination, time of concentration, and developing a design hydrograph. Example equations and clear tables and figures make this document a handy reference for the practicing hydrologist or civil engineer.
  • Green Engineering Documentation

    To download the following technical document, 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 Green Engineering - Design principles and applications using rolled erosion control products (PDF File)
    File Size: 330887 bytes
    File Date: Tue Apr 20 11:57:02 2004

     

    In this CE News editorial, senior engineer for TRV Environmental C. Joel Sprague discusses the use of Rolled Erosion Control Products (RECP’s) and the subtleties of the Revised Universal Soil Loss Equation (RUSLE). Particularly, the author argues that the benefits of using RECP’s extend beyond erosion control. Others include enhanced infiltration and groundwater recharge, sediment capture, hydrostatic pressure relief, and reduced flow velocities. Sample equations, example problems, tables, and graphs are provided to help illustrate the material.
  • Revolution Evolution Documentation

    To download the following technical document, 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 Revolution Evolution (PDF File)

     

    Though an ancient practice, engineers from Advanced Drainage Systems have designed a high-tech way to collect storm water. Using high density polyethylene (HDPE) plastic, they’ve designed a system of corrugated pipes that decreases the amount of storm water that the city must treat while returning water directly to the earth at the same time.

    This project case study, written by Tony Radoszewski of CE News, shows how the use of HDPE is often superior to similar systems made of concrete or steel. The new ADS system can reduce the excavation volume necessary to implement a retention/detention solution, as well as reduce the backfill needed and the overall project footprint.

  • Developing the Perfect Design Storm Documentation

    To download the following technical document, 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 Developing the Perfect Design Storm (PDF File)

     

    One of the greatest challenges facing any hydrologist or civil engineer is to apply precipitation in the form of rainfall to engineering design. Many design flaws due to poor rainfall modeling could be avoided by considering details and investigating more than one modeling option. (As the author says, “the devil’s in the details.”) This article from CE News contains overviews of three different design storm approaches, complete with equations and links to sample calculations.
  • GeoTIFF Examiner

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

    GeoTIFF Examiner
    File Size: 315351 bytes
    File Date: Fri Sep 22 10:49:36 2006

     

    There are two ways in which a TIFF (Tagged Image File Format) can be referenced geographically. The first uses partner files called TFW’s, or “World Files,” that contain scale information and real world coordinates. Secondly, the same information can be stored in specific tags within the image file itself. GeoTIFF Examiner is a utility from Mentor Software that allows users to upload a TIFF file and view the geographical data from both sources simultaneously. If no TFW file exists, one can be created. Similarly, if a TFW file does exist, the scaling and coordinate data obtained from it can be directly written onto tags embedded within the TIFF.

    Though only one image file can be viewed/modified at a time, the interface is impeccably intuitive and the price can’t be beaten-it’s 100% free.

  • Lag Tech Papers

    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 Lag Tech Papers - Lag Time Characteristics of Small Watersheds in the U.S. (PDF File)
    File Size: 23255 bytes
    File Date: Tue Mar 14 03:48:03 2006

     

    Lag time, defined as the time from the centroid of rainfall excess to the centroid of direct runoff, was evaluated for over 50,000 rainfall-runoff events in 168 small watersheds in the United States ranging from 0.243 to 3,490 acres. In most watersheds a stable value of lag time was observed for the larger storms, with peak flow the variable that best showed this tendency. The watersheds were divided into groups to explain the variation of lag time between watersheds. The groups that had a significant effect in the regression equation were geographical regions, watershed management practices, and the stability of the lag time value for the bigger storms. Separation of watersheds by land use and hydrologic behavior did not significantly improve the regression analyses.
  • Manning's N Roughness Coefficient Technical Documentation

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    Download Guide for Selecting Manning's Roughness Coefficients (PDF File)
    File Size: 3593796 bytes
    File Date: Fri Sep 22 06:36:11 2006

     

    This PDF file contains documentation on how to select Manning's Roughness Coefficient. Most hydraulic computations related to indirect estimates of discharge require an evaluation of the roughness characteristics of the channel. This document contains photographs and data for a wide range of channel conditions that can be used to select roughness coefficients for other natural channels.
  • Culvert Design Procedures Documentation

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    Download Documentation on Culvert Design (PDF File)
    File Size: 65599 bytes
    File Date: Tue Mar 14 03:40:39 2006

     

    This technical document describes a seven step procedure for the design of culverts.
  • Detention Pond Outlet Structure: Design Criteria for Energy Dissipators Documentation

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    Detention Pond Outlet Structure: Design Criteria for Energy Dissipators (PDF File)
    File Size: 2363106 bytes
    File Date: Fri Sep 22 05:17:16 2006

     

    Erosion problems at culverts or the outlet from detention basins are common. Determination of the flow conditions, scour potential, and channel erosion resistance are standard procedure for all designs. The only safe procedure is to design on the basis that erosion at a culvert outlet and the downstream channel is to be expected.

    Standard practice is to use the same headwall treatment at the culvert entrance and exit. It is important to recognize that the inlet is designed to improve culvert capacity or reduce head loss while the outlet structure should provide a smooth flow transition back to the natural channel or into an energy dissipator. Outlet structures should provide uniform redistribution or spreading of the flow without excessive separation and turbulence.

    This PDF Technical Document will focus on riprap apron, riprap outlet basins, and baffled outlets because for many designs, these outlet protection and energy dissipators provide sufficient protection at a reasonable cost.

  • Design of Riprap Channel Protection Documentation

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    Download Riprap Channel Protection Documentation (PDF file)
    File Size: 3713101 bytes
    File Date: Thu Jul 24 09:19:03 2008

     

    The Hydraulic Engineering Circular No. 11 (HEC-11) document entitled "Design of Riprap Revetment", Metric Version, FHWA IF-00-022, is available for you to download. This document includes discussions on recognizing erosion potential; erosion mechanisms and riprap failure modes; and riprap types including rock, rubble, gabions, preformed blocks, grouted rock, and paved linings. Design concepts included are design discharge, flow types, channel geometry, flow resistance, extent of protection, and toe depth. Detailed design guidelines are presented for rock riprap, and design procedures are summarized in charts and examples. This document also presents design guidance for wire-enclosed rock (gabions), precast concrete blocks, and concrete-paved linings.
  • Riprap Channel Protection Design Software

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    Riprap Channel Protection Design Software (ZIP File)
    File Size: 2916100 bytes
    File Date: Fri Sep 22 10:42:38 2006

     

    The Riprap Channel Protection Design Software addresses three areas pertinent to the design of channel protection:

    • The program contains the U.S. Army Corps of Engineers (USACE) riprap design guidance for placement in the dry for channels subjected to velocity forces in low turbulent flow based on guidance found in USACE (1994).
    • The program provides guidance for the design of gabion mattresses for the same flow conditions as the riprap design guidance. The gabion sizing guidance is based on Maynord (1995).
    • The program provides guidance for estimating scour depth in erodible channels based on guidance given in Maynord (1996).

    To install the software, perform the following steps:

     

    1. Place the zip file into a temporary folder.
    2. Unzip the zip file.
    3. Double click setup.exe.
    4. Follow the onscreen directions to install.