2011•Arid Environmental MonitoringRequires access

Study on Soil Erosion of Small Watershed Based on GIS and USLE/RUSLE

Ding Shuwen

Abstract

Through investigation data,geographic database in small watershed was established.The method of USLE equation factor index was confirmed by sampling analysis data and slope cell approach.The predicted results about soil erosion of small watershed showed total soil erosion was moderate and management was highly difficult.Sloping land was the source of watershed soil erosion,because soil erosion of sloping land with 44.45 percent sloping land of watershed area was 78.89 percent of total soil erosion.Cultivation conducive to water and soi1 conservation,return of farmland to forests could successfully control soil erosion.

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Key concepts: Watershed, Erosion, Universal Soil Loss Equation, Soil conservation, Hydrology (agriculture), Environmental science, Land use, Sampling (signal processing)