Identification of hidden dangers of landslides in UHV transmission channels in the Three Gorges Reservoir Area based on time series InSAR

doi:10.13474/j.cnki.11-2246.2023.0047

Abstract

Abstract: The ultra high voltage(UHV) transmission line located in the Three Gorges Reservoir Area is an important part of China's power supply, but geological disasters such as landslides in the Three Gorges Reservoir Area occur frequently, which seriously threaten the safety of UHV transmission line. Therefore, the monitoring and identification of landslides are particularly important for the safe operation of UHV transmission lines. Due to the complex terrain and climate conditions in the Three Gorges Reservoir Area, this paper proposes an adaptive optimization network construction method and applies it to the process of time series interferometric synthetic aperture radar (InSAR) technology, and 84 Sentinel-1 images from Wanzhou-Badong in the Three Gorges Reservoir Area are processed to achieve surface deformation monitoring of UHV transmission channels. The reliability of the time series InSAR monitoring results are verified by the measurement data of the BeiDou Navigation Satellite System and the field investigation data of the Jinjiling landslide. According to the time series InSAR measurements, 8 obvious landslide hazards are identified in the UHV transmission channel. Further analysis of the time series deformation of the monitored Jinjiling landslide shows that the deformation characteristics of the landslide are related to rainfall, reservoir water level and engineering disturbance.

Key words: time series InSAR, Three Gorges Reservoir Area, UHV transmission channel, landslide monitoring

CLC Number:

ZHANG Lingqi, XIE Chou, CHEN Mi, TIAN Bangsen, YANG Zhi, ZHU Yu. Identification of hidden dangers of landslides in UHV transmission channels in the Three Gorges Reservoir Area based on time series InSAR[J]. Bulletin of Surveying and Mapping, 2023, 0(2): 97-103.

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