ASCE will be sunsetting the Civil Engineering Database (CEDB) in the coming months. We encourage you to start using the ASCE Library to perform content searches. In the ASCE Library, you can save your search results as well as receive email content alerts when new content relevant to your area of interest is published. Try it out today at https://ascelibrary.org.

 

Water Erosion Prediction Project (WEPP) Watershed Model: Hydrologic and Erosion Calculations

by J. J. Stone, USDA-ARS, United States,
V. L. Lopes, USDA-ARS, United States,
L. J. Lane, USDA-ARS, United States,



Document Type: Proceeding Paper

Part of: Watershed Planning and Analysis in Action

Abstract:

The Water Erosion Prediction Project (WEPP) watershed model is a distributed continuous simulation model developed to compute the spatial and temporal distribution of erosion and deposition within small agricultural watersheds. The model is made up of three major components; hillslope, channel, and impoundment. The hillslope component calculates rainfall excess by the W.H. Green and G.A. Ampt infiltration equation, peak runoff rate by a method based on a semi-analytical solution of the kinematic wave equation for overland flow, interrill erosion as a function of soil detachment by raindrop impact, sediment delivery to rill flow areas by broad sheet flow, and rill erosion as a function of the flow's ability to detach sediment, sediment transport capacity, and the existing sediment load in the flow. Channel infiltration is calculated by either the Green and Ampt or a transmission loss equation. The impoundment component computes deposition within terrace impoundments and stock tanks, and sediment delivery through spillways. Additional aspects of the subject are discussed.

Subject Headings: Erosion | Watersheds | Simulation models | Sediment transport | Computer models | Water storage | Spatial distribution

Services: Buy this book/Buy this article

 

Return to search