The analysis of soil erosion sensitivity in Chengde

The study revised the evaluation index of the single factor Precipitation R value of the soil erosion sensitivity on the basis of USLE. In the support of GIS software, the study had a hierarchical and comprehensive evaluation about the impact fators of the soil erosion sensitivity. Results show that mild sensitive area accounts for 42%, moderate sensitive area accounts for 22%, highly sensitive area accounts for 9%, general area accounts for 27%. In terms of spatial distribution, southern and northern areas are mostly the highly or extremly sensitive areas. The soil erosion sensitivity of South is mainly determined by the degree of hypsography. So these areas belong to the precipitation erosion sensitivity area. In the northern area, the dominated erosion factor is vegetation coverage factor.