EVALUATION OF GEOLOGICAL HAZARD SUSCEPTIBILITY BASED ON GIS AND INFORMATION METHOD: A Case Study of Changjiang County, Hainan Province

The geological hazards in Changjiang County of Hainan Province are controlled by geological environment conditions and influenced by various external factors. According to the detailed investigation data of geohazards in the area, the controlling conditions and inducing factors of various geohazards are selected as evaluation indexes, and the information analysis model is built by establishing the influencing factor system of geohazards. Through the quantification and normalization for each factor, the analytic hierarchy process(AHP) is used to determine the weight coefficients of evaluation factors, and the ArcGIS spatial overlay analysis to evaluate the geohazard susceptibility in Changjiang County. This study will hopefully provide basis for geohazard early warning-monitoring and avoidance-relocation in the area.