Zoning evaluation of landslide hazard susceptibility in Zhuxi County
According to the previous research experience and the characteristics of landslide disaster development in Zhuxi County,six factors including stratigraphic lithology,elevation,slope,slope direction,vegetation coverage rate and distance from fault were selected as the basic factors.Human engineering activities,rainfall,density of similar disaster surface and density of different disaster surface are as triggering factors.The main weight and the objective weight were determined by the analytic hierarchy process(AHP)and the criteria importance though intercrieria correlation(CRITIC)method respectively.The comprehensive weight method based on the moment estimation theory was used to carry out the linear combination weight for the main weight and the objective weight,and combined with the information quantity method.Based on GIS platform,Zhuxi County was divided into slope units according to its landform characteristics.Different factor map layers were superimposed according to the comprehensive weighted information method to obtain the landslide hazard susceptibility zoning map of the study area and evaluate it.Receiver operating characteristic(ROC)curve was used to verify the zoning results and zoning methods.In this paper,Zhuxi County is divided into slope units and combined with the comprehensive weighted information method to evaluate the landslide hazard susceptibility zoning with high accuracy.The results show that the model method is reliable and applicable.
landslidesusceptibility zonecomprehensive weighting methodslope unitweighted information value
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