Research on the Joint Evaluation of Geological Disaster Susceptibility Based on Fractal Theory and Hierarchical Analysis Method

Abstract

In recent years, strong earthquakes and extreme climate events occur frequently in southwest China, forming a large number of mass geological disasters, which seriously threaten the life and property safety of local people. Therefore, so it is particularly important to carry out the refined evaluation of regional geological disaster susceptibility. On the basis of summarizing the previous research results, in the mountain area of mianzhu, Sichuan province, selected elevation, undulation, slope, stratum, fault, drainage, highway, based on the fractal theory (FT) joint level analysis (AHP) evaluation model, realize the study area fine geological disaster prone evaluation, make up for the traditional method in terms of weight determination and calculation accuracy. The evaluation results show that the extremely high prone area and the high prone area are basically concentrated in the low fluctuation area, low slope area, dense water system area and fault concentration area, with an area of 90.38km2 (13.63%). The AUC value of the combined model was 0.865, indicating that the evaluation results have high accuracy and reliability, which can provide necessary support for the geological disaster prevention and control work in Mianzhu city, and can also provide reference for the evaluation of geological disaster susceptibility in similar areas.