加权信息量模型在滑坡易发性评价中的应用——以湖北省恩施市为例

APPLICATION OF WEIGHTED INFORMATION VALUE MODEL TO LANDSLIDE SUSCEPTIBILITY ASSESSMENT——A CASE STUDY OF ENSHI CITY,HUBEI PROVINCE

信息量模型物理意义明确、操作简单,在滑坡易发性评价中得到广泛应用,但该模型未考虑各评价因子的权重。本文提出了基于层次分析法的加权信息量模型,并以湖北省恩施市为例,采用基于GIS的空间分析方法,分析了地形、断裂、水系、工程地质岩组等因子对研究区滑坡的影响,利用加权信息量将研究区划分为高易发区、中易发区、低易发区和极低易发区。

Abstract Information value model is a widely used landslide susceptibility assessment method. However, it neglects the weights of different factors. This paper proposes the weighted information value model based on AHP. The impact of terrain, fault, fiver and lithology types on landslide in Enshi City is assessed with GIS spatial analysis. According to the weighted information value of these controlling factors, the study area can be divided into high, intermediate, low and very low susceptible areas for landslide occurrence.