Evaluation of landslide susceptibility by weighted information value method based on determination coefficient method:taking Xingyi City,Guizhou Province as an example
Evaluation of landslide susceptibility by weighted information value method based on determination coefficient method:taking Xingyi City,Guizhou Province as an example
In this paper,taking the landslide geological disasters in Xingyi City,Guizhou Province,as the research object,the correlation analysis of the evaluation factors was carried out by Pearson correlation coefficient(PCC).Seven evaluation factors are selected,including slope,planar curvature,geomorphological type,engineering rock formation,distance from structure,slope structure,and distance from water system.Calculate the weight values of each factor by determination coefficient method,construct a weighted information model,and make a comparative analysis with the evaluation results of single information model and determination coefficient model.The results show that the weighted information model accounts for 89.14％of landslides in high and extremely high susceptibility areas,with an AUC value of 0.798,which is higher than the 88.24％and 0.788 of the information model and 85.52％and 0.787 of the determination coefficient model.The evaluation results of the weighted information model are more reasonable and with higher accuracy than the single information model and the deterministic coefficient model.
关键词
滑坡/地质灾害/信息量法/确定性系数法/加权信息量法/易发性评价
Key words
landslide/geological disaster/information value model/determination coefficient model/weighted information value model/susceptibility evaluation
万方数据