基于加权信息量法的湖北省兴山县地质灾害危险性评价与区划

Geological Hazard Risk Evaluation and Division Based on Weighted Information Method in Xingshan County,Hubei Province

以湖北省兴山县为研究对象,选取高程、坡度、坡向、坡型、断层、工程地质岩组、地表水、植被8个孕灾条件因子和降雨、建房切坡、修路切坡3个诱发因素因子构建地质灾害危险性评价指标体系,采用加权信息量法对不同因子进行排序与赋权,然后利用ISODATA聚类算法进行地质灾害危险性区划,并对评价结果进行精度评价。研究结果表明,评价结果与实际情况符合度较高,区划结果合理,可以为区域地质灾害危险性评价提供技术参考。

Xingshan County of Hubei Province is taken as the research object,the risk evaluation index system of geological disasters was constructed by selecting eight disaster-pregnant conditions factors such as elevation,slope,slope direction,slope type,fault,engineering geological rock group,surface water and vegetation,and three inducing factors such as rainfall,building cutting slope and repairing cutting slope.The weighted information method was used to sort and weight different factors,and then the ISODATA clustering algorithm was used to divide the risk of geological disasters,and the accuracy of the evaluation results was evaluated.The results show that the evaluation results are in good agreement with the actual situation,and the zoning results are reasonable,which can provide technical reference for the risk assessment of regional geological disasters.