Evaluation of Landslide Susceptibility in Important Areas of Hejing County-Lutai County Based on GIS
In response to the complex geological tectonic move-ments and frequent collapse disasters in the important geological hazard areas of Luntai County and Hejing County in Xinjiang,the 1∶10000 precision survey was conducted on the collapse disasters in the important areas of the study area,based on high-precision re-mote sensing data interpretation and InSAR deformation monitor-ing,supplemented by unmanned aerial vehicle three-dimensional oblique photography,geophysical exploration,drilling,mountain engineering,experiments,and other work methods.After analyz-ing the formation mechanism and disaster mode of collapse disas-ters in the area,seven influencing factors were selected as evalua-tion factors,including distance from the fault,distance from the water system,distance from the road,engineering rock group,slope direction,slope,and elevation.Through the spatial analysis function of ArcGIS,correlation analysis was conducted on 7 fac-tors.Finally,6 independent factors including distance from fault,distance from road,engineering rock group,slope direction,slope,and elevation were selected as evaluation indicators.Grid units were selected as basic evaluation units for information content cal-culation,and an information content model was constructed to evaluate and zoning the susceptibility of collapse disasters in the study area.The results show that the area of high susceptibility ar-eas is about 3612.97km2,accounting for 21.06%,the area of medi-um susceptibility areas is about 5109.70km2,accounting for 29.78%,the area of low susceptibility areas is about 4909.44km2,accounting for 28.61%,and the area of non-susceptibility areas is about 3525.35km2,accounting for 20.55%.The evaluation results are basically consistent with the field investigation,and can provide a basic basis for disaster prevention and reduction management,na-tional spatial planning and use control,new rural areas and key proj-ect planning and construction services in the research area.
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