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TitleDebris flow susceptibility mapping using a qualitative heuristic method and Flow-R along the Yukon Alaska Highway Corridor, Canada
AuthorBlais-Stevens, A; Behnia, P
SourceNatural Hazards and Earth System Sciences vol. 16, 2016 p. 449-462,
Alt SeriesEarth Sciences Sector, Contribution Series 20160005
Mediapaper; on-line; digital
File formatpdf
NTS115A/11; 115A/12; 115A/13; 115A/14; 115B/09; 115B/10; 115B/14; 115B/15; 115B/16; 115F/09; 115F/15; 115F/16; 115G/01; 115G/02; 115G/03; 115G/05; 115G/06; 115G/07; 115G/08; 115G/09; 115G/10; 115G/11; 115G/12; 115G/13; 115G/14; 115G/15; 115H/03; 115H/04; 115H/05; 115J/03; 115J/04; 115J/05; 115K/01; 115K/02; 115K/07; 115K/08; 115K/09; 115K/10
AreaYukon Alaska Highway Corridor; Kluane Lake; Beaver Creek; Haines Junction; St. Elias Mountains; Yukon Plateau; Williscroft Creek; Slims River
Lat/Long WENS-141.0000 -137.0000 62.7500 60.5000
Subjectssurficial geology/geomorphology; landslides; debris flows; debris flow deposits; mapping techniques; modelling; slope stability analyses; drainage systems; source areas; tectonic setting; climate; vegetation; airphoto interpretation; satellite imagery; energy resources; transportation; pipelines; Denali Fault; Tintina Fault; natural hazards; infrastructure; risk reduction; debris flow susceptibility; debris flow parameters; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; sketch maps; tables; graphs; models; satellite imagery; aerial photographs; photographs
ProgramMarine Geohazards, Public Safety Geoscience
ProgramProgram of Energy Research and Development (PERD)
AbstractQualitative heuristic and random forest methods were used to generate susceptibility maps for debris flows, rockfalls/rock slides, and active layer detachment slides in the Donjek River area within the Yukon Alaska Highway Corridor (YAHC), based on an inventory of landslides compiled by the Geological Survey of Canada in collaboration with the Yukon Geological Survey. The aim of this study is to reduce risk to infrastructure such as a proposed pipeline route roughly parallel to YAHC. The factors contributing to slope failure used in both models include slope angle, slope aspect, plan curvature (derived from a 5 x 5 m DEM), bedrock geology, surficial geology, proximity to faults, permafrost distribution, vegetation distribution, and proximity to drainage system. In the heuristic method, the data layers were weighted and integrated based on expert knowledge independent of the inventory, resulting in separate susceptibility maps for different types of landslides. In the random forest model, a relatively new classification method for landslide research, the known landslide events were used to produce a classification map together with probability maps for each class, which served as the susceptibility maps for debris flows, rockfalls/rock slides, and active layer detachment slides. Success rate curves were calculated to evaluate the performance of the resulting maps. The random forest method performed better than the heuristic method in most of the experiments in that the susceptibility maps created were better predictors of the known events.
Summary(Plain Language Summary, not published)
This a comparison of two landslide susceptibility methods. One qualitative and one quantitative for a proposed pipeline route along the Yukon Alaska Highway corridor in southwest Yukon. The qualitative study seems to reveal a better assessment of the landslide susceptibility than the quantitative method.