Soil Erosion Research Based on USLE in Great Khinggan

Based on the amended model of USLE universal soil loss equation and GIS technology, combined with the natural geographical features of Great Khinggan area, it has conducted quantitative analysis of the factor in Soil loss equation. Uses 2011 years TM/ETM images classification are land uses/cover type figure, combination Great Khinggan area Digital Elevation Model (DEM) and soil type distribution figure and research regional rainfall information, we gets all factors values of space distribution in the USLE model, gets soil erosion volume estimates data and soil erosion strength distribution figure based on grid cell data. Then according to Sl190-96 of ratings standard (table) for ratings, obtained Great Khinggan area soil erosion strength grade distribution figure. Study results indicate that the micro-absolute percentage of erosion throughout the study area, with increasing slope, area of erosion and erosion gradually reduce trend increases with the elevation increases, reduced erosion area after, generally good soil and water conservation in the region. Through the analysis of the region with a view to Government decision-making behavior, such as erosion control, soil and water conservation to provide the scientific basis.