关键词: 溪洛渡水电站, 滑坡, SBAS, 形变, 时序分析

Abstract: The stability of bank slope near the reservoir is one of the key factors in dam operation risk identification. Especially at the early stage of water storage, whether the slope in reservoir area near the dam is affected by the rise and fall of the water level is a key concern. In this paper, ascending and descending Sentinel-1A time-series data are used to monitor the deformation of Xiluodu hydropower station on the Jinsha River and its surrounding area. The deformation analysis from January 2020 to December 2020 shows that the main structures of Xiluodu hydropower station and the near-dam bank remain stable, while two landslide deformation areas with large deformation are found in the surrounding areas away from the dam. The results of SBAS-InSAR deformation monitoring are in good agreement with the field survey results. The results show that Sentinel-1A time-series data and SBAS-InSAR technology have broad application prospects in the field of deformation monitoring in alpine and gorge regions, and can provide a new technical means for reservoir deformation monitoring and early warning of dams.

Key words: Xiluodu hydropower station, landslide, SBAS, deformation, time-series analysis