Identification of landslide hazards of Beipanjiang Guangzhao hydropower station based on Lutan-1 SAR satellite

doi:10.13474/j.cnki.11-2246.2025.0312

Abstract

Abstract: Lutan-1 (LT-1) SAR satellite is China's first L-band fully polarimetric civil interferometric SAR satellite constellation.It is composed of two SAR satellites with the same parameters,and the revisit period can reach 4 days in the follow-up mode,which has the advantages of high resolution,short revisit period and full polarization imaging.It is conducive to the identification of landslide hazards in complex areas. In this paper,13 scenes of LT-1 ascending SAR data from April 2,2023 to June 21,2023 are obtained,and the differential interferometry synthetic aperture radar (D-InSAR) is used to identify landslide hazards,and the reliability of the identification results is verified by combining optical remote sensing images. The results show that there are 6 landslide hazard areas in Beipanjiang Guangzhao hydropower station,which are mainly distributed in the north-east direction of the reservoir area,and the spatio-temporal evolution characteristics of the two typical hazard areas are analyzed in detail through comprehensive rainfall and optical remote sensing images,and it is found that rainfall is one of the factors affecting slope stability,which proves the feasibility and effectiveness of LT-1 satellite in landslide hazard identification,and provides a new data source for the geological disaster prevention and control industry.

Key words: LT-1, D-InSAR, Beipanjiang Guangzhao hydropower station, landslide, rainfall

CLC Number:

P237

XU Qingsong, HU Jun, CUI Wengang, LIU Suihua, HU Dan, NING Fei, LI Man. Identification of landslide hazards of Beipanjiang Guangzhao hydropower station based on Lutan-1 SAR satellite[J]. Bulletin of Surveying and Mapping, 2025, 0(3): 71-75,132.

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