APPLICATION OF AHP-INFORMATION METHOD IN GEOLOGICAL HAZARD SUSCEPTIBILITY EVALUATION BASED ON SLOPE UNIT

The accuracy of conventional susceptibility evaluation models cannot meet the actual needs in gully areas with diverse and complex disaster-causing factors despite various geological hazard risk assessment methods based on ArcGIS. The analysis of geohazard susceptibility based on slope element can fully reflect the combination of controlling and inducing factors, while the information method based on analytic hierarchy process(AHP) can not only form orderly groups and layers of disaster-inducing factors in terms of dominant relation, but also combine statistical analysis and evaluation with quantitative model, therefore the evaluation of slope body is more effective and more applicable. In this study, taking the disaster susceptibility evaluation zoning in Lueyang County of Shaanxi Province as an example, the combination of both methods above as well as slope type evaluation factor is used for prone area evaluation/division and verification of evaluation accuracy through spatial overlay analysis. The results are consistent with actual situation, which can provide basis for accurate evaluation and disaster prevention and mitigation of geohazards in the area.