Risk Evaluation of Regional Collapses Geological Hazard Based on D-S Evidence Theory-A case study of Haiyuan active fault belt in Ningxia Province

At the regional collapse of geological hazard evaluation process, in the selection of evaluation factors and determination of the weight, there are subjectivity, uncertainty, and many other issues. In this paper, the Haiyuan fault belt in Ningxia Province is the study area, respectively, with D-S evidence theory and fuzzy comprehensive evaluation methods to build a collapse of geological hazard assessment model, presented Concrete evidence theoretical algorithm. The application results show that the evidence theoretical evaluation model compared to fuzzy comprehensive evaluation model is more reliable and accurate. It solved the uncertainty evaluation issues.