Evaluation of geological hazard risk in Xiaojin County with time series InSAR deformation

The evaluation of geological hazard risk can provide the scientific basis for regional geological hazard prevention and control. The traditional superposition analysis of model factors fails to fully consider the correlation between factors and the degree of their impact on disasters. In this paper, Xiaojin County is selected as the research area for the evaluation of geological hazard risk. According to Pearson correlation coefficient method, 14 factors containing InSAR deformation value were screened. The evaluation of geological hazard risk in Xiaojin County was carried out based on weighted information content model and weighted evidence weight model using the above factors. Finally, the receiver operating characteristic curve (ROC curve) is used to compare and analyze the evaluation accuracy of the two models. The results show that the Area Under Curve (AUC) value of the ROC curve of the weighted information content model is higher, and the accuracy of the evaluation results is better. Better risk assessment results can be obtained by constructing the model after factor screening.