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The Water Erosion Prediction Project: Model Overview

by L. J. Lane, USDA, United States,
A. D. Nicks, USDA, United States,
J. M. Laflen, USDA, United States,
M. A. Weltz, USDA, United States,
W. J. Rawls, USDA, United States,
D. I. Page, USDA, United States,



Document Type: Proceeding Paper

Part of: National Water Conference

Abstract:

A new generation of water erosion prediction technology is being developed by the USDA Water Erosion Prediction Project (WEPP). The WEPP models are a new erosion prediction technology based on fundamentals of stochastic weather generation, infiltration theory, hydrology, soil physics, plant science, hydraulics, and erosion mechanics. The hillslope or representative profile version of the model discussed herein provides major advantages over existing erosion prediction technology including capabilities for estimating spatial and temporal distributions of soil loss. The new technology is expected to replace the Universal Soil Loss Equation as the primary erosion prediction tool used by action agencies. The model user requirements, model structure, and experimental program for WEPP are summarized.

Subject Headings: Erosion | Spatial distribution | Mathematical models | Hydrologic models | Structural models | Project management | Soil loss

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