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TitleRetrogression characteristics of landslides in fine-grained permafrost soils, Mackenzie Valley, Canada
AuthorWang, B; Paudel, B; Li, H
SourceLandslides vol. 6, no. 2, 2009 p. 121-127,
Alt SeriesEarth Sciences Sector, Contribution Series 20080095
PublisherSpringer Nature
Lang.English; English
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories
NTS106N; 106O; 107B; 107C
AreaMackenzie Valley; Inuvik; Richards Island; Mackenzie River
Lat/Long WENS-136.0000 -130.0000 69.7500 67.2500
Subjectsengineering geology; surficial geology/geomorphology; landslides; landslide deposits; slope deposits; slope failures; slope stability; slope stability analyses; permafrost; freezing ground; temperature; ground temperatures
Illustrationslocation maps; tables; graphs; plots; photographs
ProgramSecure Canadian Energy Supply
Released2009 04 23
AbstractThirteen landslides (retrogressive thaw flows) were investigated to study the behavior of thaw retrogression in permafrost in the Mackenzie Valley, Northwest Territories (NWT), Canada. Those landslides are all in fine-grained ice-rich permafrost soils. Such landslides usually start from small-scale slope failures followed by retrogressive thaw flows when ice-rich permafrost soils are exposed to the atmosphere. The landslides were marked with survey stakes to measure their retreat rates for the thawing season of 2007. Two correlations are presented: one is between scarp wall height and retreat rate; another is between overall slope angle and retreat rate. It was found that thaw flow retrogression rate increases with increase in scarp wall height and slope angle up to a certain limit. It was also confirmed that thaw flow retrogression is not influenced by slope orientation.

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