GEOSCAN Search Results: Fastlink

GEOSCAN Menu


TitleInSAR investigation of sackung-like features and debris flows in the vicinity of Hawkesbury Island and Hartley Bay, British Columbia, Canada
 
AuthorHuntley, DORCID logo; Rotheram, DORCID logo; Bobrowsky, PORCID logo; Lintern, GORCID logo; MacLeod, RORCID logo; Brillon, C
SourceSlope Stability 2020: Proceedings of the 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering; by Dight, P M (ed.); 2020 p. 207-226, https://doi.org/10.36487/ACG repo/2025 09 Open Access logo Open Access
Image
Year2020
Alt SeriesNatural Resources Canada, Contribution Series 20200613
PublisherAustralian Centre for Geomechanics (Perth, Australia)
MeetingSlope Stability 2020: 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering; AU; May 12-14, 2020
Documentserial
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceBritish Columbia
NTS93E/04; 93E/05; 93E/12; 93E/13; 93L/04; 103G/01; 103G/02; 103G/07; 103G/08; 103G/09; 103G/10; 103G/15; 103G/16; 103H; 103I/01; 103I/02; 103I/03; 103I/04; 103J/01; 103J/02
AreaHawkesbury Island; Hartley Bay
Lat/Long WENS-130.7167 -127.6761 54.0847 53.0942
Subjectsmarine geology; surficial geology/geomorphology; soils science; geophysics; environmental geology; Nature and Environment; Science and Technology; Health and Safety; coastal environment; fiords; landslides; debris flows; slumps; creep; slope stability; slope failures; permafrost; climate effects; meteorology; storms; floods; tsunami; deltas; tides; remote sensing; satellite imagery; radar methods; airphoto interpretation; mapping techniques; geological history; glacial history; deglaciation; tectonic history; isostatic rebound; faulting; bedrock geology; structural features; field work; in-field instrumentation; Infrastructures; Climate change; cumulative effects; synthetic aperture radar surveys (SAR); Public safety; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; geoscientific sketch maps; satellite images; photographs; tables; time series
ProgramPublic Safety Geoscience Terrestrial Landslides
Released2020 05 01
AbstractFuture development in coastal northwest British Columbia requires safe, secure locations for infrastructure installations and communities. The challenge for managing environmental and infrastructure protection and site reclamation will be to accommodate future extreme weather events, climate change, and damage from earthquakes, landslides and tsunamis. New insights into the terrestrial and marine geohazards offered by our work will help reduce the future development risks to governments, resource industries, communities and the environment. SAR imagery captures two debris flow events in the vicinity of Hartley Bay that occurred between September 2017 and January 2018 during fall or winter storm events. SAR imagery also captures flooding in a nearby lake basin over this period. The extent to which the debris flows detected impacted local watersheds has yet to be determined by ground observations and public consultation. For Hawkesbury Island and the surrounding area, a provisional InSAR analysis suggests that on short time-scales (< 2 years), the deep-seated, sackung-like bedrock fractures observed on the western flank are stable. These paraglacial features were likely formed by stress release during debuttressing of side walls, glacio-isostatic rebound, neo-tectonic faulting, and permafrost loss during deglaciation. This finding has implications for landslide and tsunami risk assessments, suggesting the stable western flank of Hawkesbury Island does not represent a geological hazard to fjord-bound communities, coastal infrastructure, and natural resource activities.
Summary(Plain Language Summary, not published)
Spaceborne satellite remote sensing captures landslides, flooding and stable slopes. This publication implications for landslide and tsunami risk assessments, suggesting the stable western flank of Hawkesbury Island does not represent a geological hazard to fjord-bound communities, coastal infrastructure, and natural resource activities.
GEOSCAN ID327876

 
Date modified: