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TitleProviding multidisciplinary scientific advice for coastal planning in Kitimat Arm, British Columbia
AuthorLintern, GORCID logo; Blais-Stevens, AORCID logo; Stacey, CORCID logo; Shaw, J; Bobrowsky, PORCID logo; Conway, K; Huntley, DORCID logo; MacKillop, K; Overeem, I; Scherwath, M
SourceSubaqueous mass movements and their consequences: assessing geohazards, environmental implications and economic significance of subaqueous landslides; by Lintern, D GORCID logo (ed.); Mosher, D GORCID logo (ed.); Moscardelli, L G (ed.); Bobrowsky, P TORCID logo (ed.); Campbell, CORCID logo (ed.); Chaytor, J (ed.); Clague, J (ed.); Georgiopoulou, A (ed.); Lajeunesse, P (ed.); Normandeau, AORCID logo (ed.); Piper, DORCID logo (ed.); Scherwath, M (ed.); Stacey, CORCID logo (ed.); Turmel, D (ed.); Geological Society, Special Publication vol. 477, 2019 p. 567-581,
Alt SeriesNatural Resources Canada, Contribution Series 20180072
PublisherGeological Society of London (London, United Kingdom)
Mediapaper; on-line; digital
File formatpdf; html
ProvinceBritish Columbia
NTS103H/15; 103I/02
AreaKitimat Arm; Kitimat; Kitamaat Village; Hartley Bay; Douglas Channel; Hawkesbury Island
Lat/Long WENS-129.0000 -128.5000 54.2500 53.7500
Subjectsmarine geology; surficial geology/geomorphology; engineering geology; hydrogeology; Health and Safety; Science and Technology; Nature and Environment; Transport; coastal environment; marine environments; fiords; coastal management; regional planning; slope failures; landslides; debris flows; mass wasting; tsunami; geological history; modelling; seismology; seismicity; seismic risk; earthquakes; earthquake risk; crustal movements; marine sediments; deltas; postglacial deposits; muds; landslide deposits; debris flow deposits; glacial deposits; moraines; scouring; bedrock geology; structural features; faults; bathymetry; grab samples; marine sediment cores; geophysical surveys; seismic surveys, marine; acoustic surveys, marine; side-scan sonar; slope stability analyses; salinity; groundwater flow; in-field instrumentation; sea level fluctuations; Kitimat Slide Complex; Kitimat Delta; Infrastructures; mitigation; Mitigation; glaciomarine sediments; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; geoscientific sketch maps; geophysical images; seismic profiles; cross-sections; profiles; plots; photographs; tables; time series
ProgramPublic Safety Geoscience Assessing landslides and marine geohazards
Released2019 04 16
AbstractA 6.3 m tsunami swept through Kitimat Arm, British Columbia in 1974. An even larger wave struck and damaged the Northlands Navigation dock at Kitimat and the Haisla First Nation docks at Kitamaat Village the following year. Further down the fjord, two large coastal block failures were observed on the fjord walls across from the Gitga'at village of Hartley Bay. Several large infrastructure projects have recently been proposed for the Kitimat Arm coastal areas. The Geological Survey of Canada has therefore embarked on a five-year project to understand the magnitude and frequency of submarine mass movements in this fjord system to provide information regarding the risks from these events and to propose mitigation measures that may reduce these risks. We provide here an overview and the main results to date of an ongoing multidisciplinary study, which includes palaeotsunami studies, geomorphological and sub-seabed mapping, subaerial landslide hazard assessment, tsunami modelling, in situ and laboratory geotechnical testing, and the real-time tracking of seismic activity and seafloor movement. Some of these activities are reported in greater detail elsewhere in this book. The results of this research are summarized as a list of conclusions and recommendations to the Government of Canada.

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