Analysis of spatiotemporal evolution characteristics of typical landslides in the Jinsha River Basin based on SBAS-InSAR technology

doi:10.13474/j.cnki.11-2246.2024.1118

Abstract

Abstract: The Jinsha River Basin belongs to the high mountain canyon area, with complex geological and geomorphological features.The numerous canyons, steep terrain, and a large amount of rainfall have led to frequent landslide disasters,which have caused serious impacts on human safety,production,and the environment.However,conventional measurement methods have drawbacks such as high cost,long cycle,and insufficient spatial resolution,making it difficult to fully reflect the evolution characteristics of landslides.Therefore,this article uses SBAS-InSAR technology combined with Sentinel-1A data from the lifting track to obtain surface deformation information of the Ahai Reservoir area in the Jinsha River Basin from January 2019 to December 2020.Three typical landslides,namely Ligu,Baiya,and Luoziru,are selected for spatiotemporal evolution characteristics analysis.The research results indicate that SBAS-InSAR technology can effectively identify typical landslides in high mountain canyon areas.During the monitoring period,the maximum deformation rate of the Li Gu landslide is -68 mm/a,and the cumulative deformation variable is -148 mm.The overall spread from the deformation center to the west towards the Jinsha River is in a strip shape.The maximum deformation rate of Baiya landslide is -40 mm/a,and the cumulative deformation variable is -77 mm.The maximum deformation rate of Luoziru landslide is -90 mm/a,and the cumulative deformation reaches -260 mm.

Key words: SBAS InSAR technology, high mountain canyon area, Jinsha River Basin, typical landslide

CLC Number:

P237

YANG Fang, DING Renjun, LI Yongfa. Analysis of spatiotemporal evolution characteristics of typical landslides in the Jinsha River Basin based on SBAS-InSAR technology[J]. Bulletin of Surveying and Mapping, 2024, 0(11): 102-107.

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