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TitleFibre Bragg grating and Brillouin optical time domain reflectometry monitoring manual for the Ripley Landslide, near Ashcroft, British Columbia
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AuthorHuntley, D; Bobrowsky, P; Zhang, Q; Zhang, X; Lv, Z
SourceGeological Survey of Canada, Open File 8258, 2017, 66 pages, https://doi.org/10.4095/304235
Year2017
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceBritish Columbia
NTS92H/11
AreaAshcroft; Thompson River
Lat/Long WENS-121.5000 -121.2500 50.7500 50.5000
Subjectssurficial geology/geomorphology; stratigraphy; geophysics; landslides; deformation; transportation; time domain reflectometry; stratigraphic analyses; structural analyses; flow structures; in-field instrumentation; equipment testing; software; meteorology; Ripley Landslide; geological hazards; monitoring methods; optical fibre sensing; real-time techniques; fibre Bragg grating (FBG); Brillouin optical time domain reflectometry (BOTDR); landslide triggers; risk management; infrastructure security; railway safety; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; photographs; schematic diagrams; tables; plans; screen captures; time series; graphs
ProgramMarine Geohazards, Public Safety Geoscience
Released2017 07 24
AbstractAn international multi-year project is investigating and monitoring the Ripley Landslide, 7 km south of Ashcroft, British Columbia. The aim of this collaborative work is to better understand and manage landslides along Canada's western railway corridor. From 2013 to 2016, the China Geological Survey (CGS) and Geological Survey of Canada (GSC) collaborated to test and evaluate experimental fibre Bragg grating (FBG) and Brillouin optical time domain reflectometry (BOTDR) technologies on an active landslide for the first time in Canada. Open File 8258 describes the operational procedures for these monitoring systems. FBG and BOTDR monitoring systems were installed on a lock-block retaining wall that separates the Canadian National (CN) and Canadian Pacific Railway (CP) tracks. This vital component of railway infrastructure crosses the southern extent of the main slide body; and was monitored with the aims of better understanding the deformation mechanisms and potential triggers for sudden movement; and managing the risks associated with railway operations. Monitoring data was processed on site then accessed by wireless transmitter from remote terminals at the CGS and GSC offices. Results, discussed in the context of interpretations from other physical surveys of the landslide, provide new insight into the nature and distribution of surficial earth materials, their stratigraphic relationships, internal structure of the landslide, and structural integrity of critical railway infrastructure. This study demonstrates that optical fibre sensing real-time techniques are viable, cost effective monitoring methods that can ensure the safety and security of the railways, thereby reducing risks to national public safety, the environment, natural resources and international economies.
Summary(Plain Language Summary, not published)
This Open File describes the operational procedures for experimental fibre optic monitoring technologies installed at Ripley Landslide, 7 km south of Ashcroft, British Columbia. This work was part of international multi-year project working to better understand and manage landslides along a critical portion of Canada's western railway corridor. Results presented demonstrate that optical fibre sensing techniques monitoring landslides can help reduce risks to the public environment, natural resources and economy.
GEOSCAN ID304235