Landslide Evolution Assessment Based on Sequential InSAR Methods in the Kunming Transmission Line Corridor

The security of the transmission line corridor is an important guar- antee for the sustainable supply of electricity and an important prerequisite for the rapid development of the economy. Transmission corridors located in high mountains and valleys are often threatened by geological disasters, which seriously affect their stable operation. This research investigates the landslide in the Kunming transmission corridor using 79 Sentinel-1A SAR images from July 2020 to October 2021. Using interferometric synthetic aperture radar (InSAR) methods, deformation changes before the landslide are analyzed. Factors like precipitation, lithology, and vegetation coverage demonstrate a correlation with landslide occurrence. Seasonal variations in deformation were related to precipitation. The landslide's primary causes are attributed to precipitation, carbonate karstification, and vegetation coverage. Ultimately, this research establishes a correlation between deformation changes and influencing factors in the Kunming transmission corridor, contributing to a deeper understanding of landslide evolution and ensuring the corridor's security for sustainable electricity supply and economic development.