| Desktop GIS software,i.e.ArcMap and ArcView,is used to establish the spatial database,including boundary of study area,landuse,soil category,plant,etc.Based on the GIS's function of raster spatial analysis,the study area is discreted into uniform grids with the cell of 10 m×10 m.According to the database management function of GIS software,RUSLE is integrated with ArcView and ArcGIS to predicted soil erosion in the study area after reading the database document and selecting reasonable RUSLE factor values.With the help of map algebra operation of the GIS software,we have got the grid diagram of soil erosion quantity by multiplying each factor.Carrying on a classification towards the grid diagram of erosion,we acquired the grade diagram of the soil erosion,too.Then we use the diagram of soil erosion to get the overlay between it and the diagram of landuse,also between the diagram of DEM slope.Ultimately,we have acquired the soil erosion quantity based on the condition of different landuse and different slope.This text also gets the relationships between soil erosion and land using type,slope. |