重庆库区松散土体滑坡危险性分区及评价

Risk Zoning and Assessment of Losse Soil Landslides along the Bank of theThree Gorges Reservoir in Chongqing Area

通过对重庆库区松散土体滑坡灾害危险性影响因素的分析,构建了滑坡危险性分区评价方法,即运用灰色聚类理论和关联度法遴选8个危险性因子,并用层次分析方法量化其权重系数以及用专家系统评分法给每一危险因子赋值。以重庆市万州区吴家湾滑坡为例用等面积网格法,通过GIS系统空间多因子叠加获取其危险性指数并绘制其危险性等值线图,根据危险性指数进行其危险性分区并对其进行评价。

By analysis on risk factors of loose soil landslide disaster along the bank of the Three Gorges Reservoir in Chongqing area, the progress assessment method of risk zoning is worked out in this paper. With the grey cluster theory and connectedness degree, eight risk factors are selected. The values to every factor are endowed by use of the Analytical Hierarchy Process (AHP) and the Dephel method. Taking Wujiawan landslide as an example, the risk index and chorogram are given to Wujiawan landslide on GIS basis by use of equivalent finite net. And also the risk zoning is made on the basis of risk index.