基于信息量模型的陕西省合阳县地质灾害易发性区划

Susceptibility Zoning of Geological Hazards in Heyang County Based on the Information Model

在对合阳县地质灾害进行野外调查和资料收集的基础上,选用灾害点密度、坡型、坡高、坡度、岩土类型和人类工程活动6个因子建立该地区地质灾害易发性分区的评价指标体系,采用基于GIS的信息量模型进行合阳县地质灾害易发性区划,并针对不同分区提出相应的地质灾害防治措施.根据计算分析,最终将研究区划分为非易发区、低易发区、中易发区和高易发区4个区.其中高易发区占研究区总面积的20.16%,中易发区占总面积的4.47%,低易发区面积占总面积的3.98%,非易发区面积占总面积的71.39%.

Based on the detailed investigation of geological hazard in Heyang County,this paper selects six factors including disaster density,slope shape,slope height,slope,rock and soil types and human engineering activities to establish an evaluation index system for geological hazard susceptibility zoning in this area.The GIS-based information volume model is used to carry out the zoning of geological hazard in Heyang County,and corresponding geological disaster prevention measures are proposed for different zones.According to the calculation and analysis,the study area is finally divided into non-prone areas,low-prone areas,medium-prone areas and high-prone areas.Among them,we find the high-prone area is accounted for 20.16% of the study area,the medium-prone area is accounted for 4.47% of the total area,the low-prone area is accounted for 3.98% of the total area,and the area is of non-prone area accounted for 71.39% of the total area of the county.