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Simulation of Brush Removal within Eight Watersheds in Texas

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  022168,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.10415) @2002
Authors:   W. Rosenthal, W. Dugas, S. Bednarz, T. Dybala, R. Muttiah
Keywords:   Rangeland, modeling, brush, GIS spatial database

The Soil and Water Assessment Tool (SWAT) model was used to simulate the effects of brush removal on water yield in eight watersheds in Texas for 1960-1998. Landsat 7 satellite imagery was used to classify land use, and the 1:24,000 scale DEM was used to delineate the watershed boundaries and subbasins. After calibrating SWAT to existing stream gage flows, brush removal was simulated by converting all heavy and moderate categories of brush (except oak) to open range (native grass). Water yield (surface runoff and base flow) varied by subbasin, but not all subbasins showed an increase in water yield as a result of removing brush.

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