Liujiaxia Area Potential Landslides Identification and Analysis Based on InSAR Technology

The widespread loess landform, rainfall, reservoir construction and farmland irrigation in the Liujiaxia region cause frequent occurrence of landslides in the region. Therefore, it is of great significance to study the early identification of landslides for the region. Based on the SBAS-InSAR technology and by utilizing Sentinel-1A satellite image of 59 scenes, the recent three-year lineof-sight (LOS) surface deformation rate of the Liujiaxia region was extracted for this paper. Multiple potential landslide masses in the region were identified, and a time series analysis was performed on typical potential landslide masses. The results are as follows: (1) The surface deformation rate of the Liujiaxia region was $- 38 \sim 20$ mm/a during the study period, and a total of 24 potential landslide masses were identified according to the surface deformation rate and Google Earth images; (2) A detailed analysis was performed on the potential landslide masses that might pose serious threats to Wangjia Village and Bashigeyuan Village, showing that the surface deformation rate was significantly accelerated during farmland irrigation and concentrated rainfall. This study can provide data and theoretical support for the early identification of potential landslide masses in the Liujiaxia region as well as for disaster prevention and mitigation.