Engineering Software

The following Compressed ZIP files contain an EXE file.

Modified May 21, 2008
 

Each routine contains help screens which describe variable assignments and limits, etc., which may be printed. New users should print this help file. Some routines allow the user to save input as a data file. The default rainfall values are for Illinois Counties. For other states, the user may edit the rainfall file. Exiting a routine returns the user to computer desktop (there is no menu to switch between routines).

Where's the "non-CCE version" of this software?
Version 2.0 works on both  CCE and and on non-CCE computers. CCE is an acronym for Common Computing Environment, a standard configuration for USDA computers.

What other CCE-compatible software is available for USDA computers?
To download other USDA CCE software go to USDA CCE website (downloads only available from USDA CCE computers)

EFH2 Hydrology

Peak discharge is determined by procedures in Engineering Field Handbook Chapter 2.  Required information includes watershed characteristics (drainage area, curve number, hydraulic length, watershed slope) and rainfall amount and distribution. Applies when:

• Watershed is accurately represented by a single runoff curve number between 40 and 98.
• Watershed area is between 1 and 2,000 acres.
• Watershed hydraulic length is between 200 and 26,000 feet.
• Average watershed slope is between 0.5 and 64%.
• No valley or reservoir routing is required.
• Urban land use within the watershed does not exceed 10%.

Software comes with rainfall data for Nebraska counties.  Illinois users can download county.il file and place in the EFH2 directory (default install subdirectory is C:\Program Files\USDA\EFH2).  Illinois users will then have access to 1-year through 100-year 24-hour duration rainfall for each county (Illinois State Water Survey Bulletin 70 data).

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Hydraulics Formula

This program contains solutions to the hydraulic equations that are frequently encountered on soil and water conservation activities. All of these solutions are presented in a graphical form that more readily displays the inputs and solutions. Printed reports are available from all of the hydraulic solutions that will satisfy most documentation requirements.

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Download dams2.zip Software  Compressed ZIP file (146 KB)

Runs in batch mode. Develops inflow hydrographs and uses the storage-discharge relationships at dam sites to floodroute the hydrographs through existing or potential reservoirs. Storage-discharge relationship may be computed by the program from physical parameters or may be directly entered into the program. Floodroutes synthetic or historical storms. Drainage area from 20 acres to 100 square miles. Analyzes dams in series.

SITES Structure Site Analysis

Go to USDSA-NRCS Water & Climate Center

The SITES software is a descendent of the SCS DAMS2 program. DAMS2 was a full- featured rainfall-runoff routing program developed over an extended time period for use in SCS dam design and analysis. In developing the SITES software, DAMS2 was recoded and the auxiliary (emergency) spillway analysis portion of the program was rewritten and expanded to include new technology for spillway performance evaluation developed through the joint efforts of the Agricultural Research Service and the NRCS.

The auxiliary spillway performance model incorporated into SITES utilizes an iterative application of a three-phase approach to the spillway erosion process. The first phase of the erosion or failure process is the failure of the vegetal cover, if any, and the development of concentrated flow. The second phase is the downward erosion in the area of concentrated flow, resulting in the formation of a headcut. The third phase is the downward and upstream movement of the headcut, with the potential of breaching the spillway. Each of these phases is described in the model by a set of threshold-rate relations based on the mechanics of the process. A headcut erodibility index is introduced to describe the resistance of the exposed geologic materials to erosive attack during phase 3 of the process.

Download wsp2.zip Software Zip compressed file (129 KB)

Computes water surface profiles in open channels. Estimates head loss at restrictive sections, including roadways with either bridge openings or culverts. Limits: maximum 15 profiles and 50 cross-sections.   This is DOS software that runs in batch mode.

Download fldwyzip.exe Software  Zip compressed file (59.2 KB)

Calculates floodway at given cross sections along a stream. The floodway is minimum width required to carry the selected (generally 100-year) flood with a specified increase in the water surface elevation. Based on equal conveyance reduction concept. Uses data similar to TR-61 WSP2. This is DOS software that runs in batch mode.

ANIMAL WASTE MANAGEMENT (at NRCS Fort Worth, TX)
Go to UDA_NRCS NWCC Link

Executable file for waste management

US Army Corps of Engineers Hydrologic & Hydraulic Software

At the official US Army Corps of Engineers Hydrologic Engineering Center software download site, the following software is available:

• HEC-1 Hydrology
• HEC-HMS Hydrology
• HEC-2 Hydraulics
• HEC-RAS Hydraulics
• HEC-6 Sedimentation