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TitleMulti-parameter monitoring of a slow moving landslide: Ripley Slide, British Columbia, Canada
AuthorBobrowsky, PORCID logo; Sladen, W; Huntley, DORCID logo; Zhang, Q; Bunce, C; Edwards, T; Hendry, M; Martin, D; Choi, E
SourceEngineering Geology for Society and Territory - volume 2: Landslide Processes: proceedings of the International Association of Engineering Geology; by Lollino, G (ed.); Giordan, D (ed.); Crosta, G B (ed.); Corominas, J (ed.); Azzam, R (ed.); Wasowski, J (ed.); Sciarra, N (ed.); 2015 p. 155-158, 18
Alt SeriesEarth Sciences Sector, Contribution Series 20140007
PublisherSpringer International Publishing
MeetingIAEG XII Congress - International Association of Engineering Geology; Torino; IT; September 15-18, 2014
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia
NTS92I/11NW; 92I/11SW
AreaThompson River; Ashcroft
Lat/Long WENS-121.5000 -121.2500 50.7500 50.5000
Subjectssurficial geology/geomorphology; geophysics; Nature and Environment; Science and Technology; Health and Safety; Transport; landslides; slope stability; slope failures; in-field instrumentation; piezometric levels; geodesy; satellite geodesy; geophysical surveys; seismic surveys; remote sensing; satellite imagery; radar methods; core samples; core analysis; glacial history; Ripley Landslide; ShapeAccelArray (SAA); translational landslides; Infrastructures; Railway networks; Railway safety; monitoring; Global positioning systems; synthetic aperture radar surveys (SAR)
Illustrationslocation maps; photographs
ProgramPublic Safety Geoscience Marine Geohazards
Released2015 01 04
AbstractThe Thompson River, south of Ashcroft, British Columbia, Canada is a particularly unique area where complex glacial geology, active geomorphic processes and critical infrastructure (both major national rail lines-CPR and CN) intersect with and are affected by a long history of slope instability. Well documented landslides along a +10 km stretch of the valley have been impacting infrastructure as far back as the 19th century. The Ripley landslide is a small slow moving translational failure that is known to have been active since 1951. It poses a hazard to the onsite infrastructure since both the CN and CPR tracks run adjacent to each other along the entire breadth of the landslide. The economic repercussions of severing both railways here would be pronounced. In response to this threat, an extensive suite of monitoring technology is now being applied that includes: traditional applications including permanent monitoring using GPS stations and piezometers; subsurface investigations involving drilling and shallow seismic surveys; the adoption of novel technologies such as linear fibre optic sensing and vertical subsurface ShapeAccelArray (SAA) inclinometry, the installation of corner reflectors for satellite based (RADARSAT-2) interferometry and the deployment of ground-based SAR and LiDAR for ongoing quantitative assessment. Herein we summarize the collective efforts associated with this extensive array of instrumentation and monitoring studies being undertaken to better manage this and other landslide hazards in Canada and elsewhere.
Summary(Plain Language Summary, not published)
This paper provides an update on the various methods and techniques that the Geological Survey of Canada is using to monitor a small landslide in British Columbia. This project represents a joint effort with the rail companies, Transport Canada, universities and the China Geological Survey. The results will help reduce the risk of future landslides impacting infrastructure in Canada.

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