The Evaluation Of Susceptibility Of Geological Hazard Based On GIS In Shuifu County

Shuifu County is located in the transition ladder zone between the southwest margin of the Sichuan Basin and the Yungui Plateau. As the geological environment in Shuifu Count y is very complicated, it’s one of the most serious areas in China suffered from geological hazards. This question has been seriously restricted social and economic development in Shuifu.With the help of project work “the geological hazards detailed investigation in Shuifu Count y”. On the foundation of extensively collecting the relevant geology data and investigation data in the region, we expatiate the natural geography and the background conditions of geological environment. This article describes the main types of geological hazards in Shuifu County. Then the basic characteristics, the distribution rule, the formation mechanism and controlling factors of the geological hazards are explored in detail. Based on the analysis of influence factors,the slope、gradient、terrain prominency、stratum lithology、river system and road transportation are selected as evaluation factors. Based on the Arc GIS platform, we extracting the relevant layer. Evaluate the susceptibility and regional planni ng of geological hazards in Shuifu Count y by adopting the information value method.According to the survey results of the geological hazards : The extremely high-risk and high-risk covers an area of 162.44 square kilometers, accounting for 36.93% of the county area. The medium-risk covers an area of 171.51 square kilometers, accounting for 39.00% of the county area. The low-risk and extremely low-risk covers an area of 105.85 square kilometers, accounting for 24.07% of the count y area. The Evaluation results correspond to the actual condition very well.