United States Department of Agriculture
Natural Resources Conservation Service
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Hydrology and Hydraulics

HecRAS Training Manual

This manual is a self-study training manual. It will familiarize the user with the capabilities of the HecRAS program.

This document requires Adobe Reader.

HecRAS manual (PDF; 2.5 MB)

This manual is approximately 173 pages.


Flood Frequency Analysis (FFA)

This program uses the Log Pearson III statistical analysis on the record of annual peak flow values as recorded at stream gage stations. Annual peak flow data is entered using an input file.

The program produces an output file and graph showing flow values and associated probabilities of occurrence.

This file requires Winzip or a similar program to decompress.

FFA Program (ZIP; 277 KB)


Contact Information

You may send comments regarding this Web site to:

State Conservation Engineer

Peter E. Wright
Syracuse, New York
Telephone: 315-477-6538

If you have questions related to Hydrology and Hydraulics, please contact:

Civil Engineer

Chris Henry
Syracuse, New York
Telephone: 315-477-6544

If you encounter any problems with files provided on this page, have questions, suggestions, or find a broken link, please contact Gary Vandawalker at 315-477-6546.


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