Reservoir landslides are typical geohazards with sophisticated thermo-hydro-mechanical interactions. However, direct observations of subsurface multi-physical processes in bank slopes remain rare. Herein we present the design, implementation and evaluation of an innovative fiber-optic nerve system based on weak-reflection fiber Bragg grating to monitor a giant landslide located in the Three Gorges Reservoir region, China. The system is capable of measuring and imaging spatiotemporal distributions of temperature, moisture and strain along boreholes in near real-time. Such visual profiles offer unique insights into the subsurface thermo-hydro-mechanical link between external conditions and geotechnical deformation, making it possible to decipher the substantial trigger of accelerated movements. Multi-physical responses at depths of interest also enable us to better understand the evolution mechanism of reservoir landslides. Fiber-optic nerve sensing can synergize with remote sensing and surface-based technologies to build a space-sky-ground-subsurface integrated monitoring system for landslides.

Subsurface Multi-Physical Monitoring of a Reservoir Landslide With the Fiber-Optic Nerve System

Schenato L;Pasuto A
2022

Abstract

Reservoir landslides are typical geohazards with sophisticated thermo-hydro-mechanical interactions. However, direct observations of subsurface multi-physical processes in bank slopes remain rare. Herein we present the design, implementation and evaluation of an innovative fiber-optic nerve system based on weak-reflection fiber Bragg grating to monitor a giant landslide located in the Three Gorges Reservoir region, China. The system is capable of measuring and imaging spatiotemporal distributions of temperature, moisture and strain along boreholes in near real-time. Such visual profiles offer unique insights into the subsurface thermo-hydro-mechanical link between external conditions and geotechnical deformation, making it possible to decipher the substantial trigger of accelerated movements. Multi-physical responses at depths of interest also enable us to better understand the evolution mechanism of reservoir landslides. Fiber-optic nerve sensing can synergize with remote sensing and surface-based technologies to build a space-sky-ground-subsurface integrated monitoring system for landslides.
2022
Istituto di Ricerca per la Protezione Idrogeologica - IRPI
Fiber Optics
Landslide
Monitoring system
Three Gorges Reservoir
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Descrizione: Geophysical Research Letters _2022_ Subsurface-Multi_
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/414734
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