ISSN 1003-8035 CN 11-2852/P

    基于量化因子的地质灾害易发性评价以重庆市綦江区为例

    Susceptibility assessment of geological hazards based on susceptibility quantitative factors: A case study in Qijiang District, Chongqing City

    • 摘要: 綦江区是重庆市地质灾害高发区域,本研究以綦江区为研究区,根据区内地形地貌、地质构造并结合DEM数据,提取了斜坡单元内的斜坡结构、坡度、地灾点密度、工程地质岩组、距水系距离、岩层倾角和地质构造共7项主要致灾因子,进行量化分析并结合地质灾害野外现场核查和修正其各因子权重和分级赋值后,采用层次分析法进行斜坡单元地质灾害易发性评价,探索建立适合綦江区的地质灾害易发性评价体系。

       

      Abstract: Qijiang District is a high-risk area for geological hazards in Chongqing. In this study, Qijiang District is selected as the research area. Based on the topography, geomorphology, geological structure, and DEM data of the region, seven main factors of geological hazards within slope units were extracted, including slope structure, slope gradient, density of geological disaster points, engineering geological lithology, distance to the water system, inclination angle of rock strata, and geological structure. These factors were quantitatively analyzed and combined with field inspection of geological hazards to revise the weights and grading of each factor. The analytic hierarchy process was used to evaluate the susceptibility of geological hazards within slope units. Through this process, this study aims to establish a geological disaster susceptibility evaluation system suitable for Qijiang District.

       

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