基于要素相关性分级和统计模型的滑坡区域敏感性制图—以G212线陇南段为例

Longnan of highway 212 is one of the most serious areas of geo-disasters in China, so, landslide susceptibility mapping is vitally necessary for disaster management and planning development activities in the area. Based on the field and office studies in the study area, distribution and causes of landslide and their relationship were analyzed for determining evaluation factors and different grade of factors of landslide susceptibility mapping which were checked and verified by relative analysis, then, two landslide susceptibility maps of Longnan of Highway 212 were produced using the Bivariate Information Value Model(Infor) and Multivariate Analysis Model(Multi) with the help of Geographical Information Systems(GIS), last, the landslide susceptibility maps were checked by direct comparison and stability evaluation of selecting eight active landslides. The results showed that the outcomes from two models are correspond to the actual distribution of landslide susceptibility, at the same time, the factor relative graded method and the evaluation system combined qualitative understand of expert knowledge with quantitative estimate of mathematical model are help to obtain more accurate and reasonable landslide susceptibility maps.