In order to realize the comprehensive evaluation of geological hazard susceptibility more accu-rately,taking Yima City as an example,the study on the comprehensive evaluation of geological hazard susceptibility in different types of geological hazards was carried out.Construct an evaluation system consisting of eight evaluation indexes:slope,relief,slope direction,slope type,engineering geolog-ical rock group,distance from river,land use type and distance from road.A single model(AHP),fre-quency ratio(FR),information volume(Ⅰ)and coupled model(AHP-logistic regression(AHP-LR),frequency ratio-logistic regression(FR-LR),information volume-logistic regression(I-LR))were used to evaluate the vulnerability of geological hazards.Finally,the accuracy of receiver operating character-istic curve(ROC curve)was tested.The results show that the sum of the frequency ratios of the high and medium geological disaster prone areas obtained by the six evaluation models accounts for more than 80％of the total frequency ratios,and the success rate is greater than 0.73.The coupled model of AHP-LR,FR-LR and I-LR has a higher success rate than the single model,indicating that the coupled LR model is more effective than the single model in evaluating the geological hazard susceptibility.
关键词
易发性评价/层次分析法/频率比/信息量/逻辑回归/GIS
Key words
Susceptibility evaluation/Analytic Hierarchy Process/Frequency ratio/Information vol-ume/Logistic regression/Geographic information system(GIS)
维普
万方数据