基于GIS的三江源区冻融侵蚀强度评价

his paper has achieved a source region to define the scope of freeze-thaw erosion zone in Three Rivers District with the support of GIS technology. And then selects the annual range temperature, slope, aspect, vegetation coverage, the annual precipitation and other factors as the strength of evaluation index, works out the criteria for freeze-thaw erosion intensity evaluation, and realizes the freeze-thaw erosion intensity evaluation in Three Rivers District under the support of GIS. The results show that: Three-Rivers freeze-thaw erosion zone is of wide distribution and significant regional differentiation; high intensity thaw erosion zone are mainly distributed in large mountainous terrain, while low intensity freeze-thaw erosion zone is mainly distributed in the terrain is relatively flat area.