Geological Hazard Modeling in Macheng City Based on I+LR Method and GIS
With the advancement of urbanization,frequent geological disasters not only restrict the development of town in mountain areas,but also may cause major casualties and property losses.Consequently,the suspension of geological disasters is of great significance to predict and prevent regional geological disasters.In order to improve the accuracy and rationality of geological hazard susceptibility modeling,11 key factors of geological hazards,such as topographic features,lithology,distance from fault and NDVI(normalized difference vegetation index),were selected by digital elevation model grid data,and the geological hazard susceptibility model of landslide and collapse in Macheng City was built by using information,information value-logistic regression coupling analysis,finally the comprehensive geological hazard susceptibility assessment model was extracted by the maximum value of grid.The ROC(receiver operating characteristic)curve and rationality verification of the results of the single model and the coupling model show that the information value-logistic regression coupling model is more effective and more accurate than the traditional information value model,and the susceptibility of geological disasters in mountain areas can be evaluated more accurately by the coupling model.
geological disasterinformation value modellogistic regression modelcoupling modelsusceptibility assessment