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地质灾害易发程度评价是在区域地质灾害危险性评价中一项主要任务,其表征某一区域地质灾害发生的可能性概率的一个主要指标。利用层次分析法可以定量或半定量的评价区域地质灾害的易发程度,效果比较理想。以成县为例确定地质灾害评价目标层、准则层、指标层,将影响地质灾害的各类因子进行分级,权重分配,利用mapgis平台对工作区进行矢量网格化、空间属性叠加分析、生成等值线图,实现地质灾害易发程度分区的目的。
The assessment of the susceptibility to geological disasters is a major task in the assessment of the risk of regional geological disasters and represents a major indicator of the probability of occurrence of a geological hazard in a particular area. Analytic Hierarchy Process can quantitatively or semi-quantitatively evaluate the degree of susceptibility to geological disasters in the region, the effect is quite satisfactory. Taking Cheng County as an example, the target layer, the guideline layer and the index layer of geohazard evaluation are determined, and the various factors affecting geological disasters are classified and weighted. The mapgis platform is used to vectorize the work area by vector gridding and superposition of spatial attributes to generate Contour map to achieve the purpose of regionalization of geological hazards prone to.