Abstract: Geological disasters usually cause huge human and material damages. Evaluation of disaster-prone areas is an important means of disaster prevention and mitigation. In order to minimize the economic losses and casualties caused by disasters, this paper carries out geological disaster risk assessment research with the support of GIS. Based on the physical geography of Wenzhou city and historical data of related disasters, we analyze the influence factors of geological disasters such as elevation factors, slope factors, and aspect factors. Furthermore, we propose a comprehensive analysis method of geological disasters in the adjacent environment, and use the analytic hierarchy method to calculate the weight of each factor. We also construct the evaluation index system of Wenzhou landslide hazard susceptibility to determine Wenzhou's geological hazard prone areas. At the same time, the law of geological disaster risk under different terrain conditions in mountainous and plains is also studied. The results show that the high-risk areas in Wenzhou are mainly located in the middle and high mountains in the west, and the low-risk areas are mainly located in the eastern plains. This result can serve the disaster prevention and control work in Wenzhou.

Key words: geological hazard, vulnerability evaluation, GIS, neighboring influence, different terrains