Statistical on the spatial distribution of reservoir bank landslides in the Xiaxiaowan Reservoir-Lancang River section of SBAS-InSAR
In view of the lack of dynamic factors in the spatial distribution statistics of landslides in the past,and the dynamic changes of long-term series landslide hazards were not considered,synthetic aperture radar(SAR)data of the ascending and lowering rails and the short baseline set differential interferometry technique were used to carry out the deformation inversion of the 41 Sentinel-1A ascending and 47 Sentinel-1A descending images from September 2021 to September 2023 in the Xiaowan Reservoir Area-Lancang River section in this paper.The contribution rate of slope,aspect,stratum lithology and other factors to the landslide.The results showed that the overall deformation of the Xiaowan Reservoir-Lancang River section was-112.3～120.9 mm/a;the spatial distribution of landslides was statistically analyzed,and the distribution of landslides was mainly concentrated between 1 300 and 1 500 m above sea level,between 30° and 45°,The slope direction was northeast,due east,and southwest,and the lithology was soft rock,and the contribution rates of altitude,slope,aspect,and stratum lithology to the landslide were 0.359,0.126,0.103,and 0.553,respectively.The research results could provide reference for the prevention and control of reservoir and bank disasters.
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