Early Identification, Monitoring and Warning of Landslide Hazard in Northeast Sichuan Based on Integrated Remote Sensing Technology

China has a wide range of geological hazards. At present, nearly 300,000 potential hazards have been found through manual investigation. However, many major geological hazards occurred in recent years are not within the scope of the discovered potential hazards, and a large number of potential hazards have not been discovered. As a frequent geological disaster area in China, there are various types of disasters in Northeast Sichuan, and landslide disasters are the most common. Due to the dense vegetation and complex terrain in the disaster source area, conventional ground surveys or single remote sensing methods have limitations, and it is difficult to efficiently and effectively carry out early identification, monitoring and early warning of landslide disasters. In this paper, Qingchuan County, Sichuan Province, is taken as the research demonstration area. Combined with the understanding of relevant work in recent years, the technical process of early identification, monitoring and early warning of landslide hazards based on comprehensive remote sensing technology is preliminarily summarized, and its effectiveness is analyzed and verified on the spot with typical examples. The relevant research results have a certain reference value for the early identification, monitoring and prevention of landslide hazards in geological hazard prone areas.