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The New USDA-NRCS WinTR-55 Small Watershed Hydrology Model

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  022236,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.10431) @2002
Authors:   Karl Visser, Claudia Scheer
Keywords:   Hydrology, Modeling, Stormwater, TR55, TR-55

USDA-NRCS Technical Release 55 (TR-55) Hydrology for Small Watersheds model is widely used for stormwater hydrology. This software has been updated to Windows from DOS. Significant enhancements have been included such as: full hydrograph development using TR-20 computational engine, capability to change the rainfall distribution and the dimensionless unit hydrograph, Muskingum-Cunge channel routing, updated reservoir routing procedure, and graphical hydrograph output.

This paper briefly describes these changes and provides an introduction to the WinTR-55 software. The model and documentation can be downloaded from the USDA-NRCS National Water and Climate Center web: http://www.wcc.nrcs.usda.gov/water/quality/hydro/

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