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TitleLandslide susceptibility, hazard and risk assessments along pipeline corridors in Canada
AuthorBlais-Stevens, AORCID logo; Couture, R; Page, A; Koch, J; Clague, J J; Lipovsky, P S
SourceGeoCalgary2010, Proceedings of the 63rd Canadian Geotechnical Society conference; by Canadian Geotechnical Society; 2010 p. 878-885
Alt SeriesEarth Sciences Sector, Contribution Series 20100207
MeetingGeoCalgary2010, 63rd Canadian Geotechnical Society conference; Calgary; CA; September 12-16, 2010
ProvinceYukon; Northwest Territories
NTS105A; 105B; 105C; 105D; 115A; 115B/16; 115G; 115F/16; 115K/01; 115K/02; 115K.07; 115K/08; 96E; 106H; 106I; 106J/16; 106N; 106O
AreaMackenzie River; Alaska Highway; Whitehorse; Watson Lake; Teslin; Jake's Corner; Haines Junction; Burwash landing; Koidern; Beaver Creek; Rancheria; Morley River
Lat/Long WENS-136.0000 -125.0000 69.0000 64.7500
Lat/Long WENS-141.0000 -128.0000 63.0000 60.0000
Subjectssedimentology; surficial geology/geomorphology; landslides; landslide deposits; debris flows; pipelines; permafrost; environmental studies; environmental impacts; erosion susceptibility; slope stability; slope failures; slope stability analyses; erosion; Quaternary
ProgramEnvironmental Geoscience, environmental impacts and adaptation in the northern environment
AbstractTwo large gas pipeline projects, Yukon Alaska Highway Pipeline and Mackenzie Gas Project Pipeline are under different stages of development in northern Canada. Both proposed pipeline routes cross rugged, harsh environments in permafrost terrain, therefore, may be at risk from natural hazards.
Landslide inventory and hazard assessments are essential in qualifying or quantifying risk along linear infrastructure and in assessing environmental impacts. The Geological Survey of Canada has for several years contributed to hazard assessments by performing baseline geological regional studies. This paper presents the work that was carried out along two pipeline routes in northern regions. Both proposed routes are over 800 km-long. Landslide inventory and qualitative parametric landslide susceptibility maps were carried out for both, showing good correlations between landslide distribution and landslide susceptibility maps. In the Mackenzie Valley Pipeline Corridor, most landslides (99%) have occurred in fine unconsolidated sediments and shallow slopes. In the Yukon Alaska Highway Corridor, the majority has occurred in unconsolidated sediments (65%) but a few landslides (15%) have occurred in bedrock with high relief. Thus, our preliminary investigations indicate that there is a slope hazard in both corridors to be considered during pipeline development.

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