Risk evaluation of Karst collapse using GIS and RS

This article extracts and analyzes disaster information by using GIS and RS technology. It determines the weights by using the Analytic Hierarchy Process (AHP), and it constructs risk evaluation model to do risk evaluation of geological disasters. In this paper, Lai bin, Jili of Guangxi Province is selected as an example to evaluate the risk of Karst collapse because of its strong karst landform. This paper obtains karst collapse geological hazards risk zoning by using GIS and RS technology for the first time. Through analyzing the geological environment in the study area, it selects 10 evaluation factors to evaluate the risk of Karst collapse. At last, it gets the zoning evaluation map. The evaluation result is consistent with the actual situation in the study area, and it provides reference data to the economic development as well as for the prevention of karst collapse.