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《Journal of Soil and Water Conservation》 2017-04
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Soil Erosion and Sediment Yield Assessment Based on RUSLE in Beiluo River on the Loess Plateau,China

YAN Rui;ZHANG Xiaoping;LI Gouxia;CHEN Hao;State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau,Northwest A&F University;  
Under the background of the "Grain for Green"program to control severe soil loss from human activities,the soil erosion and sediment yield were estimated based on the sediment delivery distributed model(SEDD)and the revised universal soil loss equation(RUSLE)in the upper reaches of the Beiluo River on China's Loess Plateau.The model was used to simulated the spatial vatiations of soil erosion intensity and sediment yield in 1990,2000 and 2010.The results show that the average soil erosion modulus were 18 189.72t/(km~2·a),7 408.93t/(km~2·a)and 2 857.76t/(km~2·a),respectively,and the average annual sediment yield were14 093.31t/(km~2·a),5 997.65t/(km~2·a)and 2 394.37t/(km~2·a),respectively in 1990,2000 and 2010.Besides,the average soil erosion modulus gradually decreased with the increasing vegetation coverage.The results also showed that both the soil erosion modulus and sediment yield were the highest in the altitude of1 475~1 575 m.The average soil erosion modulus gradually increased with the increasing slope gradient,and with 75% of soil erosion was ascribed to the region with slope15°.Moreover,the ranking of the average soil erosion modulus from high to low was:sunny slopehalf-sunny slopehalf-shady slopeshady slope.This results provide an useful reference for the rational utilization of water and soil resources and offer a technical basis for using RUSLE to estimate the soil erosion on the Loess Plateau of China.
【Key Words】: RUSLE SEDD soil erosion and sediment yield topography Loess Plateau
【Fund】: 国家自然科学基金项目(41230852 41440012 41101265);; 黄土高原土壤侵蚀与旱地农业国家重点实验室专项(A314021403-C2)
【CateGory Index】: S157.1
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