Applied research of slope radar in emergency monitoring of major sudden landslides

Landslides often occur in deep river valleys with high altitudes in remote regions in southwest China. In the process of emergency rescue, there are some difficulties, such as difficulty in arrival of personnel, difficulty in ground investigation and monitoring, and great damage caused by sustained deformation. In this paper, we use interferometric synthetic aperture radar to carry out real-time monitoring of a landslide mass and study deformation characteristics using the emergency monitoring of Baige Landslide in Jiangda County of Tibet Autonomous Region and Aniangzhai Landslide in Danba County of Sichuan Province as examples. Through the real-time deformation map in the monitoring area obtained by S-SAR-I, we have identified the ranges of strong deformation regions. Through the cumulative apparent deformation, deformation velocity and deformation acceleration of each monitoring point, we have monitored the whole deformation law of each deformation area in real time and judged the deformation evolution stage of each deformation area. In addition, we have successfully identified and forecasted the local sliding failures in each deformation area. The slope radar can carry out non-contact all-weather real-time monitoring of sudden major geological disasters. This method not only captures the deformation characteristics of the disaster in real time, but also ensures the safety of the monitoring personnel. This approach has great significance for the future emergency monitoring and early warning and forecast of sudden geological disasters.