WRCS is striving to collect, and make available to the web-browsing public,
as many free applications in hydrology and hydraulics as possible. If you know
of any valuable shareware of freeware that we can include in our pages, please
contact us!
The following Shareware, Freeware or Demo programs pertaining to Water
Resources Engineering are available for downloading from our FTP site. In order
to get a detailed description of a particular program, browse the list in the
frame to the left, and then click on a program name to get its details in this
frame. The program files are contained in self extracting ZIP files. To
download, just select the program name. To expand into program files, put the
self extracting executable file into its own directory and then execute it. In
order to get a detailed description of a particular program, browse the list in
the frame to the left, and then click on a program name to get its details in
this frame.
CAP
- CAP (Culvert Analysis Program) follows USGS standardized procedures for
computing flow through culverts. It can be used to develop stage-discharge
relationships for culverts and to determine discharge through culverts from
high water marks. It will compute flows for rectangular, circular, pipe arch,
elliptical, and other nonstandard shaped culverts. The program solves the 1-D
steady-state energy and continuity equations for upstream water-surface
elevation given a discharge and a downstream water-surface elevation.
- Surface
Profile Calculator for Windows
- This program allows for the calculation of surface profiles of trapezoidal
channels using both the direct step method and the standard step method.
Normal flow conditions can also be calculated. This is a very handy tool for
the calculation of these profiles shapes.
- FREQ
- Program FREQ is a graphics based LP3 flood frequency estimation program.
Estimation is done by least squares. Features of the program are calculation
of unbiased frequency factors and confidence limits for estimates. The program
allows the user to alter the value of skew and/or peaks to years ratio. The
effects of any changes can be monitored graphically.
- H&H
Utility Suite
- This collection of eight hydrology and hydraulics utilities are different
from, and a complement to, the Hydraulics Utility Programs listed below. They
consist of the following independent programs, zipped together into one
self-extracting file.
- Weirflo - broadcrested, cipolletti, triangular and shallow swale weir
flows.
- SCSCN - storm runoff hydrograph model based upon the SCS Curve Number
method and NEH4.
- Routec - reservoir routing using the Puls method.
- Pearson - fits a series of flow events to a Log Pearson Type III
distribution.
- Meltsum - computes snow melt from a degree-day model.
- Gully - A program to compute gully control structure design parameters.
- Deschan - Storm channel design program for trapezoidal channels.
- Cross2 - rating curve estimates from channel cross section surveys.
- DCUH
- Unit Hydrograph Program for the estimation of a unit graph from rainfall
and discharge data. The method uses Snyder's Least Squares algorithm coupled
with the author's modified smoothing method. The program assumes you have a
basic understanding of unit hydrographs.
- DESERT
- DESERT version 1.0. was designed at the International Institute for
Applied System Analysis, Laxenburg, Austria, in cooperation with the Institute
for Water and Environmental Problems, Barnaul, Russia. The purpose of this
software is to supply a flexible and easy-to-use integrated Windows PC-based
software package for decision support in water quality management on a river
basin scale. The software incorporates a number of useful tools, including
easy-to-use data handling module with a dBase style database engine,
simulation and calibration of hydraulics and water quality, display of
computed data with the help of external spreadsheet software, and optimization
based on dynamic programming algorithm. The main utility of the package is in
providing a useful and powerful instrument for water quality assessment and
decision making in emission control, including selection of wastewater
treatment alternatives, standard setting and enforcement. After downloading
this package, or for more information, you may wish to check out the IIASA
DESERT model web page: http://www.iiasa.ac.at/Research/WAT/docs/desert.html
- CEPIPE
- This program calculates partial volumes of horizontal or sloping
cylinders. It is designed to get storage volumes for stormwater detention
systems using single or multiple diameter pipes for storage. The program is
written for DOS based systems.
- TR-20
- The US SCS (now the NRCS - Natural Resources Conservation Service)
computer program for Project Formulation Hydrology. TR-20 was formulated to
develop runoff hydrographs, route hydrographs through both channel reaches and
reservoirs, and combine or separate hydrographs at confluences. The program is
designed to make multiple analyses in a single run so that various
alternatives can be evaluated in one pass of through the program.
- TR-55, Urban Hydrology
for Small Watersheds, Version 2.0
- This Rainfall Runoff Model was developed by the US Soil Conservation
Service, now known as the Natural Resources Conservation Service (NRCS). TR-55
presents simplified procedures to calculate storm runoff volume, peak rate of
discharge, hydrographs, and storage volumes required for floodwater
reservoirs. These procedures are applicable in small watersheds, especially
urbanizing watersheds, in the United States. The primary functions of the
program are for peak runoff computations using the Graphical Peak Discharge
Method, the Tabular Peak Discharge Method and Temporary Storage. Support
functions include the computation of the runoff curve number (CN), the Time of
concentration (Tc) and travel time through a subarea (Tt). Limits: NRCS type
distributions, 24-hour duration rainfall, 10 subwatersheds, minimum 0.1 hour
and maximum 10-hour time of concentration.
- SWMM4.4
- This Rainfall Runoff Model was developed by the US Environmental
Protection Agency. It is a large, complex model capable of modeling the
movement of precipitation and pollutants from the ground surface through pipe
and channel networks, storage treatment units, and finally to receiving
waters. Both single event and continuous simulation can be performed on
catchments having storm sewers and natural drainage, for prediction of flows,
stages and pollutant concentrations. This is the latest version of the program
and is downloaded from the Oregon State University FTP Site. Selecting the
program title (above) takes you there.
- HEC1Time
- This utility program will take a cumulative rainfall total (in inches or
centimeters) and distribute it incrementally over a set storm time period. It
will distribute rainfall over SCS Type I, II, or III storm patterns or a user
specified pattern. The output is a HEC-1 input-ready table of incremental
rainfall depths.
- Hydraulics
Utility Programs
- These six programs are packaged together, in a single self-extracting zip
file. They each run indepedently, but they all require a copy of BRUN20.EXE
(also included in the package) to be in either the same directory or your
computers path statement.
- Weirs - This program calculates flow (cfs) or weir length (ft) from the
weir flow equation.
- Orifices - This program solves for Q (cfs), A (sq.ft) or HW (ft) based
on tailwater and orifice centerline elevations.
- Trap. Channels - Solves Mannings equation for flow in trapezoidal, box
or triangular channels.
- Natural Channels - Solves Mannings equation for flow in natural channels
given x-y coordinates of the cross section.
- Culverts - Enter the culvert characteristics and get a Headwater vs.
Outflow rating curve indicating Inlet or Outlet Control.
- Reservoirs - Will perform reservoir routing for ten time increments,
given the inflow hydrograph and reservoir storage characteristics.
