基于I-LR模型耦合的斜坡类地质灾害易发性评价

Vulnerability Evaluation of Slope-type Geological Hazards Based on I-LR Model Coupling

以云南省寻甸县为研究对象,选取8个对地质灾害发生有影响的诱发因子作为评价指标,基于GIS平台与SPSS 26.0软件,采取信息量模型与逻辑回归模型耦合的方式,将研究区地质灾害易发性分为极低易发性、低易发性、中易发性、高易发性4个等级。研究结果表明:4个研究等级分区的面积占比分别为0.55%、19.37%、50.96%、29.12%;特征曲线(ROC)的线下面积(AUC)精度检验值为0.721,表明评价精度较高。信息量法与逻辑回归耦合的方法可以应用于地质灾害风险评价,为寻甸县防灾减灾和地质灾害预防提供科学依据。

Taking Xundian County,Yunnan Province as the research object,eight inducing factors that have an impact on the occurrence of geological hazard iade were selected as evaluation indicators,and based on the GIS platform and SPSS 26.0 software,the information quantity model and logistic regression model were coupled to divide the geological disaster susceptibility in the study area into four levels:very low susceptibility,low susceptibility,medium susceptibility and high susceptibility.The results showed that the area proportions of the four study grade zones were 0.55%,19.37%,50.96%and 29.12%,respec⁃tively.The test value of the offline area(AUC)accuracy of the characteristic curve(ROC)is 0.721,indi⁃cating that the evaluation accuracy is high.The method of coupling information quantity method and logistic regression can be applied to geological disaster risk assessment,and provide scientific basis for disaster pre⁃vention and mitigation and geological disaster prevention in Xundian County.