Abstract:

To evaluate the impact of geological disasters, this study selected the Chengde area of Hebei Province as an example. Firstly, we used AHP and ArcGIS to evaluate the susceptibility of geological disaster. Secondly, the geological disaster bearing body vulnerability was established based on the current local land use. Finally, based on the constructing the judgment matrix, the geological disaster impact evaluation was established by overlaying the geological disaster susceptibility zoning map on the geological disaster vulnerability zoning map. The results show that the high-impact and relatively high-impact areas of geological disasters are mainly distributed in the north of Kuancheng county, east of Xinglong county, and south of Pingquan city. The medium-impact areas are mainly distributed in the central and southern parts of Luanping county, the south of Xinglong county, the central and northern parts of Pingquan city, the south of Shuangqiao district, and the south of Shuangluan district. The low-impact and relatively low-impact areas are mainly distributed in the north of Chengde, Longhua, Fengning and Weichang counties. This study comprehensively considers the dual attributes of geological disasters, and accurately evaluates the geological disaster susceptibility and the vulnerability of geological disaster bearing body in different combination states. The evaluation results can effectively avoid the problem of geological disaster prevention and control planning based on the geological disaster vulnerability. In addition, the evaluation results can provide scientific basis and technical guidance for geological disaster prevention and control planning in Chengde area.

Key words: geological disaster, GIS-AHP coupling technology, impact evaluation, Chengde area