The Spatial Features of Soil Erosion in Mountain Environment Based on GIS and RUSLE——A Case Study in Sichuan Luding
The paper takes Luding County which located in western Sichuan plateau ecological environment vulnerable area as research area.The amount of soil erosion in the study area is quantitatively calculated by using GIS technology and USLE equation.The erosion intensity distribution is generated according to the the erosion intensity grading standards.The paper reveals the region out of the soil erosion geospatial distribution law.The paper analyzes the distribution characteristics of soil erosion in the geospatial and reveals soil erosion geospatial distribution law by using GIS spatial analysis and mathematical statistics.The results are showed in the following aspects.(1) The slope facter is an important factor causing soil erosion,erosion is mainly distributed in the slope of ＞ 15 ° area which is easy pole strength and severe soil erosion.(2) The characteristics of soil erosion in the vertical direction is obvious.Valley region which altitude between 1000～ 1700 m and mountain which altitude greater than 3500m prone to soil erosion.The Strip between 1700～3500 m isless prone to soil erosion because the woodland widely distributed.(3)Soil erosion mainly occurs in human strong negative interference activities areas,such as dry land,garden,shrub land,woodland and bare land.The area is 92.73％ of the total soil erosion area.
NETL
NSTL
万方数据
维普
