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Rangeland Evaluation of WEPP Hydrology

by M. R. Savabi, Univ of Maryland, United States,
W. J. Rawls, Univ of Maryland, United States,
J. R. Simanton, Univ of Maryland, United States,



Document Type: Proceeding Paper

Part of: Watershed Planning and Analysis in Action

Abstract:

The hydrology component of the Water Erosion Prediction Project (WEPP) utilizes the W.H. Green and G.A. Ampt infiltration equation to simulate the rate and volume of excess rainfall. Excess rainfall is routed along the hillslope using the kinematic wave model to determine the duration of runoff and peak runoff rate for erosion calculation. The model was evaluated on 25 rangeland sites in the western United States. The result indicates that, in general, the model is doing an acceptable job of predicting infiltration rate, volume, and peak runoff rate.

Subject Headings: Runoff | Erosion | Rangeland | Rainfall-runoff relationships | Infiltration | Rain water | Rainfall | United States

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