Study on Surface Erosion Intensity in Alpine Valley Area
The development of geological disasters is often affected by the surface erosion environment.Land form processes such as collapse,landslide,and debris flow are the most intuitive embodiment of surface erosion.The geological and geomorphological conditions are complex and the surface hydrodynamics are highly developed in alpine canyon areas.In this paper it takes Songpan County,a typical alpine canyon in West Sichuan Province,as the research area.The alpine canyon's surface erosion capacity evaluation system was established based on the MPSIAC model after a detailed investigation of regional erosion status.The surface erosion capacity evaluation of Songpan County was carried out,and the InSAR technology was used to test this result.The result shows that the high-intensity surface erosion of Songpan County is distributed in Minjiang Town and Zhenjiangguan Town in the southeast.In contrast,the low-intensity surface erosion of Songpan County is mainly distributed in Maoergai Town and Chuanzhusi Town in the north.The MPSIAC model can be modified to accurately evaluate surface erosion capacity in alpine canyon areas.
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