基于模糊综合评价的地质灾害危险性分区

选择地形地貌、易滑岩组、地质构造复杂程度、河流切割密度、年平均降雨量及地质灾害分布密度作为评价因子,每个因子分成四级,其权值由黄金分割法确定,用模糊综合评价的方法对贵州省区域地质灾害危险度分为:灾害密集发育区、灾害中等密集发育区、灾害偶发区、灾害基本不发育区。分区结果表明:灾害密集发育区和灾害中等密集发育区主要分布在贵州省西南部及东北部的部分地区;在雨季地质灾害危险性明显增加,黔东地区尤为值得关注。

The Subarea of Geologic Hazards Risk Based on Fuzzy Comprehensive Evaluation in Guizhou Province

Choosing the terrain,unsteadiness rock group,complex degree of geological structure,density of rive incision,annual rainfall and density of geological distributing as the evaluation factors,each factor is divided into four levels,and the powers of these factors are confirmed by golden section.The geologic hazards risk is partitioned into dense development region,middling development region,haphazard occurring region and occurring hardly region based on fuzzy comprehensive evaluation.The subarea results indicatindicate that the main distributing area of dense and middling geologic hazards development region is the southwest area and the part of theastern area in Guizhou province,the whole area will increases the risk will increase in the whole area,especially in Qiandong district in the rainy season.