ANALYSIS OF GEOLOGICAL HAZARD ENVIRONMENTAL CONDITIONS OF SLOPE IN SOUTHERN SHAANXI MOUNTAINOUS AREAS——TAKING XUANWO TOWN,HANYIN COUNTY AS AN EXAMPLE
In order to support the spatial planning of urban land and avoid taking the highly prone area of geological disasters as the development direction,the Xuanwo Town,Hanyin County,which is prone to geological disasters,is selected as the research example to carry out large-scale and refined geological environmental conditions of slope disasters.Select the landform(landform units,surface shape,profile shape,height,gradient,aspect),tectonics,engineering geology(rock strength,rock integrity,overburden types,overburden thickness),slope structure,river,groundwater,human engineering activities(such as building houses,building roads,and cultivating)classified into 7 categories,17 factors,to analyze the relationship between geological hazard development and geological hazard in multiple logistic regression analysis.The results show that slope surface shape,profile shape,gradient,rock strength,rock integrity,building houses and roads on slopes,slope cultivation are believed to have a significant control effect on the development of slope geological hazards.Establishing a geological hazard susceptibility evaluation model based on nine key factors can improve the accuracy of susceptibility zoning.
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