Sensitive clay landslide detection and characterization in and around Lakelse Lake, British Columbia, Canada

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dc.contributor.authorGeertsema, Marten
dc.contributor.authorBlais-Stevens, Andrée
dc.contributor.authorKwoll, Eva
dc.contributor.authorMenounos, Brian
dc.contributor.authorVenditti, Jeremy G.
dc.contributor.authorGrenier, Alain
dc.contributor.authorWiebe, Kelsey
dc.date.accessioned2018-01-29T19:01:04Z
dc.date.available2018-01-29T19:01:04Z
dc.date.copyright2017en_US
dc.date.issued2017-12
dc.description.abstractThe Lakelse Lake area in northwestern British Columbia, Canada, has a long history, and prehistory, of rapid sensitive clay landslides moving on very low gradients. However, until now, many landslides have gone undetected. We use an array of modern tools to identify hitherto unknown or poorly known landslide deposits, including acoustic subbottom profiles, multibeam sonar, and LiDAR. The combination of these methods reveals not only landslide deposits, but also geomorphic and sedimentologic structures that give clues about landslide type and mode of emplacement. LiDAR and bathymetric data reveal the areal extent of landslide deposits as well as the orientation of ridges that differentiate between spreading and flowing kinematics. The subbottom profiles show two-dimensional structures of disturbed landslide deposits, including horst and grabens indicative of landslides classified as spreads. A preliminary computer tomography (CT) scan of a sediment core confirms the structures of one subbottom profile. We also use archival data from the Ministry of Transportation and Infrastructure and resident interviews to better characterize historic landslides.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipFunding was provided by the Ministry of Forests, Lands, Natural Resource Operations and Rural Development, Natural Resources Canada's Public Safety Geoscience Program and the Program of Energy Research and Development (PERD), the Natural Sciences and Engineering Research Council of Canada, the Canada Research Chairs Program and Simon Fraser University.en_US
dc.identifier.citationGeertsema, M., Blais-Stevens, A., Kwoll, E., Menounos, B., Venditti, J.G., Grenier, A. & Wiebe, K. (2017). Sensitive clay landslide detection and characterization in and around Lakelse Lake, British Columbia, Canada. Sedimentary Geology. https://doi.org/10.1016/j.sedgeo.2017.12.025en_US
dc.identifier.urihttps://doi.org/10.1016/j.sedgeo.2017.12.025
dc.identifier.urihttp://hdl.handle.net/1828/9016
dc.language.isoenen_US
dc.publisherSedimentary Geologyen_US
dc.subjectGlaciomarine sediment
dc.subjectLandslide
dc.subjectMultibeam sonar
dc.subjectAcoustic subbottom profile
dc.subjectLiDAR
dc.subjectLakelse Lake
dc.subject.departmentDepartment of Geography
dc.titleSensitive clay landslide detection and characterization in and around Lakelse Lake, British Columbia, Canadaen_US
dc.typeArticleen_US

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