NRCS Geo-Hydro Version 1.11
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NRCS Geo-Hydro is an ArcView GIS interface to the WinTR-20 Version 1.11 hydrologic model. It operates with ESRI ArcView 3.3 and the Spatial Analyst extension. The interface is organized to complete the steps required to do a WinTR-20 hydrologic analysis. Using tools and menu selections, the user is guided step by step through the automated processes of defining the watershed boundary, dividing the watershed into sub-areas, developing cross sections, etc. The end result is a WinTR-20 execution with peak discharges, hydrographs, etc. Basic familiarity with NRCS hydrologic procedures and ArcView operations are helpful.
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The data requirements are digital elevation, digital land use, and digital hydrologic soil group raster (grid) themes at a 98.425 feet (equivalent to 30 meter) resolution. A stream location shape file (such as available from the USGS National Hydrography Dataset) is optional but recommended.
Downloads
These files require either a zip utility or Adobe Acrobat. Get download help here.
Fact Sheet (3 pages) (last updated March 20, 2009)
NRCS Geo-Hydro install package, 17 MB (last updated March 23, 2009) Unzip this file to the C:\ root directory.
NRCS_Geo-Hydro sample data, 76 MB (last updated May 18, 2005). Unzip this file to the C:\ root directory.
The Natural Resources Conservation Service used government funds to develop the NRCS Geo-Hydro software system. It may be downloaded for use and copying at no additional expense or license requirements.
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