Multi-dimensional deformation inversion of landslides using combined sentinel-1A ascending and descending orbit data
The Jinsha River,located in the upper reaches of the Yangtze River,is prone to frequent geological hazards on both sides due to its unique terrain and geological conditions.Firstly,the article employed the SBAS-InSAR technique to capture the surface deformation characteristics of landslides in the Gongjue County of the Jinsha River Basin in the Tibet Autonomous Region,spanning the period from October 2014 to October 2018,spanning from Shadong Township to Xiongsong Township.Subsequently,by integrating ascending and descending orbit DInSAR datasets,the two-dimensional deformation information was obtained in this region.Building upon this foundation,the Shadong landslide was selected as the research subject,the surface parallel flow constraint model was introduced to conduct three-dimensional deformation monitoring studies on the landslide.The results show that:(1)The study area is characterized by fragmented terrain and the development of geological hazards.Utilizing ascending and descending orbit Sentinel-1A data,nine and thirteen deformation regions were detected,respectively.Among them,the maximum deformation rate in certain areas reached 150 mm/year.(2)The two-dimensional deformation results reveal that the maximum deformation rates in the east-west and vertical directions are 147 mm/year and-70 mm/year,respectively.The spatial distribution characteristics of landslide deformation vary significantly at different locations.(3)The presentation of the three-dimensional deformation results shows the movement direction of the Shadong landslide in various locations,with the slope mainly moving in the northeast direction and accompanied by a sinking state.(4)Based on the rainfall factors in the region,the correlation between typical landslide deformation and rainfall was analyzed.The results show that Intense rainfall is critical driving factor for accelerating landslide deformation.
万方数据
维普
