WEPP Internet GIS Interface

This allows a WEPP watershed simulation to be setup from digital elevation (DEM) data. Landuse and soil data may also be used. The WEPP watershed channels are determined using TOPAZ (Topographic Parameterization Software). Using the DEM data the representative hillslopes and channel topography are determined for a WEPP simulation.

The user first selects the area of interest and then selects a watershed outlet point. From this information the watershed boundary and hillslope areas are determined.


If you have previously used the WEPP Internet GIS Interface and saved watershed simulation projects enter your user name to view a list of previously created projects.

If this is your first time using the site click on one of the state links below to begin.

To begin using the WEPP GIS interface select a state. Hawaii and Alaska are not setup. Not all layers are setup for every state. This software is only available for testing and evaluation.Click here for a complete status.

Alabama Illinois Montana Rhode Island
Alaska Indiana Nebraska South Carolina
Arizona Iowa Nevada South Dakota
Arkansas Kansas New Hampshire Tennessee
California Kentucky New Jersey Texas
Colorado Louisiana New Mexico Utah
Connecticut Maine New York Vermont
Delaware Maryland North Carolina Virginia
District of Columbia Massachusetts North Dakota Washington
Florida Michigan Ohio West Virginia
Georgia Minnesota Oklahoma Wisconsin
Hawaii Mississippi Oregon Wyoming
Idaho Missouri Pennsylvania