GIS和层次分析法在地震地质灾害小区划中的应用

Application of GIS and AHP in the Small Division of Seismic Geological Disasters

以GIS为平台,结合层次分析法对地震地质灾害的影响因素进行深入研究,评价单灾种在50年超越概率10%下的危险性。建立地震地质灾害危险性指数模型,将单灾种评价结果进行空间叠加分析,得到该超越概率下的地震地质灾害小区划图。根据地震地质灾害危险性指数将研究区分为无危险区、低危险区、中危险区、高危险区,从而为区域地震地质灾害防治规划、国土资源的合理开发及地质环境的妥善保护提供重要依据。

By taking GIS as a platform and combined with AHP,the factors of seismic geological disasters are studied deeply for evaluating single-hazard risk under the 10% probability of exceedance in 50 years;risk index model of the seismic geological disasters is established,by taking spatial overlay analysis of the evaluation results of a single disaster,the small division map under the probability of the earthquake is obtained.According to seismic geological disasters risk index the study includes non-risk zone,low-risk zone and the risk zone,high-risk zone.It provides an important basis for the prevention planning of regional seismic geological disasters,the rational development of land resources and proper protection of geological environment.