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Fiber Optic Monitoring and Forecasting of Reservoir Landslides
Landslide hazards triggered by atmospheric precipitation and periodic water level fluctuations frequently occur in reservoir areas all over the world, resulting in severe fatalities and loss of properties. For the purpose of detecting geological disasters ahead of time, a series of advance monitoring techniques have been developed and applied to engineering practices. Among them, the Distributed Fiber Optic Sensing (DFOS) technologies have shown their great potential for monitoring the tempo-spatial distribution of multi-fields (displacement, stress, temperature, seepage, etc.) of reservoir landslides. In this paper, the working principles, characteristics and applicability and these technologies are briefly introduced. In particularly, several representative DFOS-based monitoring instruments and equipment are elaborated, which have been successfully used in several landslides in Three Gorges Reservoir (TGR) area in China for long-term in situ observation and comprehensive evaluation of relevant geohazards. The monitoring results of Majiagou landslide show that the sliding surfaces, deformation pattern, and groundwater evolution can be sensitively captured based on the DFOS measurements. Seasonal rainfall and water level fluctuations are found to be the two main triggering factors of the landslide. Meanwhile, long time-series monitoring data shed a bright light on real-time deformation prediction and stability analyses of reservoir landslides. Finally, the challenges and future trends of applying the DFOS systems to landslide monitoring are summarized.
Fiber Optic Monitoring and Forecasting of Reservoir Landslides
Landslide hazards triggered by atmospheric precipitation and periodic water level fluctuations frequently occur in reservoir areas all over the world, resulting in severe fatalities and loss of properties. For the purpose of detecting geological disasters ahead of time, a series of advance monitoring techniques have been developed and applied to engineering practices. Among them, the Distributed Fiber Optic Sensing (DFOS) technologies have shown their great potential for monitoring the tempo-spatial distribution of multi-fields (displacement, stress, temperature, seepage, etc.) of reservoir landslides. In this paper, the working principles, characteristics and applicability and these technologies are briefly introduced. In particularly, several representative DFOS-based monitoring instruments and equipment are elaborated, which have been successfully used in several landslides in Three Gorges Reservoir (TGR) area in China for long-term in situ observation and comprehensive evaluation of relevant geohazards. The monitoring results of Majiagou landslide show that the sliding surfaces, deformation pattern, and groundwater evolution can be sensitively captured based on the DFOS measurements. Seasonal rainfall and water level fluctuations are found to be the two main triggering factors of the landslide. Meanwhile, long time-series monitoring data shed a bright light on real-time deformation prediction and stability analyses of reservoir landslides. Finally, the challenges and future trends of applying the DFOS systems to landslide monitoring are summarized.
Fiber Optic Monitoring and Forecasting of Reservoir Landslides
Lecture Notes in Civil Engineering
Rainieri, Carlo (editor) / Fabbrocino, Giovanni (editor) / Caterino, Nicola (editor) / Ceroni, Francesca (editor) / Notarangelo, Matilde A. (editor) / Zhu, Hong-Hu (author) / Shi, Bin (author) / Zhang, Lei (author) / Ye, Xiao (author)
International Workshop on Civil Structural Health Monitoring ; 2021 ; Naples, Italy
2021-08-25
13 pages
Article/Chapter (Book)
Electronic Resource
English
Fiber Optic Monitoring and Forecasting of Reservoir Landslides
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