Monitoring and warning of landslides and debris flows using an optical fiber sensor technology

Huafu Pei, Peng Cui, Jianhua Yin, Honghu Zhu, Xiaoqing Chen, Laizheng Pei, Dongsheng Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

60 Citations (Scopus)


Landslides and debris flows are typical geo-hazards which occur in hilly or mountainous regions. Debris flows may result from landslides. Geotechnical instrumentation plays an important role in monitoring and warning of landslides and resulted debris flows. Traditional technologies for monitoring landslides and debris flows have certain limitations. The new optical fiber sensors presented in this paper can overcome those limitations. This paper presents two new optical fiber sensor systems: one is the Fiber Bragg Grating (FBG)-based in-place inclinometer for monitoring landslides and the other is the FBG-based column-net system for monitoring debris flows. This paper presents the calibration results of FBG-based in-place inclinometers in laboratory. It is found that the calibration results are in good agreement with theoretical results. Both the FBG-based in-place inclinometers and the FBG-based column-net system have been installed at a site in Weijiagou valley, Beichuan County, Sichuan Province of China. Some preliminary results have been obtained and reported in the paper. The advantages of the FBG monitoring systems and their potential applications are also presented.
Original languageEnglish
Pages (from-to)728-738
Number of pages11
JournalJournal of Mountain Science
Issue number5
Publication statusPublished - 1 Oct 2011


  • Column-net system
  • Debris flow
  • Fiber Bragg Grating
  • In-place inclinometer
  • Landslide

ASJC Scopus subject areas

  • Global and Planetary Change
  • Geography, Planning and Development
  • Geology
  • Earth-Surface Processes
  • Nature and Landscape Conservation

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