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United States Department of Agriculture

Agricultural Research Service

Title: Modeling Change in Topography Caused by Tillage and Water Erosion

item Schumacher, T - SOUTH DAKOTA STATE UNIV.
item Schumacher, J - SOUTH DAKOTA STATE UNIV.
item Lindstrom, Michael

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 22, 1998
Publication Date: N/A

Technical Abstract: Soil redistribution within the landscape results in change to soil depth, slope gradient, and soil properties over time and space. These changes often translate into increased variation in crop yield potential within the landscape. A tillage erosion model and the WEPP hillslope model were combined to simulate dynamic soil loss and gain within a landscape containing an enclosed depression. The software allows independent simulation of each erosion process as well as interactive simulation of both processes. Multi-year simulations demonstrate patterns of soil loss and gain within the landscape that differ depending on erosion process. Concurrent simulation of tillage and water erosion result in a pattern of soil redistribution that differs from independent simulations of either process. The interaction between the two erosion processes on hillslope topography is different than a simple sum of the independent simulations.

Last Modified: 3/29/2015
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