Estimation and Analysis of Soil Erosion in the Upstream of Huaihe River

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Abstract
基于地理信息系统(GIS)和遥感(RS)技术，利用修正的通用土壤流失方程(RUSLE)模型，计算了2000~2015年的淮河上游息县流域的土壤侵蚀，分析了土壤侵蚀的时空变化特征。研究表明：近15年来 植被覆盖管理因子和水土保持措施因子基本呈现减小的趋势。主要受降水侵蚀因子的影响，流域土壤侵蚀模数总体呈减小趋势。土壤侵蚀强度主要以微弱侵蚀为主，占总面积的92.49%，主要发生在高程在300 m以下或坡度在15˚以下的区域。 Based on Revised Universal Soil Loss Equation (RUSLE), Geographic Information Systems (GIS)and (Remote Sensing) RS spatial analysis techniques, this study calculated the soil erosion modulus in Xixian Watershed of the upstream of Huaihe River from 2000 to 2015, and analyzed the spatial and temporal changes of soil erosion intensity. The results indicated that vegetation cover management factor soil and water conservation support practice factor showed a decreasing trend in the past 15 years. The soil erosion modulus decreased in the main influence factor of rainfall erosivity. The soil erosion in this region as a whole was dominantly trivial in degree with 92.49%, mainly in the regions below 300 m in elevation or 15˚ in gradient.