Estimating Soil Erosion in Three Gorges Reservoir Area Based on GIS and RUSLE
Abstract：Three Gorges Reservoir Area was chosen as the study area.The factors in the Revised Universal Soil Loss Equation（RUSLE） were quantitatively analyzed by using the digital elevation model（DEM）,land use type,soil types,vegetation cover and experiment measure based on GIS technology,and achieved soil erosion estimates in Three Gorges Reservoir Area.Then the corresponding soil erosion synthesized indexes of different slope,land use type and soil types were calculated.The results indicated that： the annual average soil erosion amount is 19 364.71×104 t,and the mean soil erosion modulus is 2 741.48 t/（km2·a）,and the erosion intensity is classified as moderate degree erosion.Micro-water areas and mild erosion area accounting for 68.57%,the serious eroded area which was mainly concentrated in the eastern only occupied 14.43% of the area,but contributed 58.67% of sediment and needed more protection.Through the size of soil erosion synthesized indexes can be seen the severity of soil erosion of different conditions.
Keywords：Three Gorges Reservoir Areasoil erosionsynthesized indexesGISRULSE
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 33-37 )