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TitleOverflow observations near the Tibbitt to Contwoyto Winter Road, NT
AuthorSladen, W E; Burn, C R; Wolfe, S A
SourceProceedings, GeoOttawa 2017, the 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conferenc; 2017 p. 1-8
Year2017
Alt SeriesNatural Resources Canada, Contribution Series 20170109
PublisherCanadian Geotechnical Society (Richmond, BC, Canada)
MeetingGeoOttawa 2017, the 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference; Ottawa, ON; CA; October 1-4, 2017
Documentbook
Lang.English
Mediapaper; digital
File formatpdf
ProvinceNorthwest Territories; Nunavut
NTS75K; 75L; 75M; 75N; 76C; 76D; 76E; 76F; 85I; 85J; 85O; 85P; 86A; 86B; 86G; 86H
AreaTibbitt Lake; Contwoyto Lake; Yellowknife
Lat/Long WENS-116.0000 -109.0000 66.0000 62.5000
Subjectssurficial geology/geomorphology; hydrogeology; Transport; groundwater; permafrost; temperature; precipitation; peat; hydraulic analyses; hydrologic environment; watersheds; modelling; meteorology; surface waters; lakes; road networks; road construction; icings; active layer; basin catchment size; geological hazards
Illustrationslocation maps; photographs; tables; graphs; time series; histograms; flow diagrams; models; schematic representations
ProgramLand-based Infrastructure, Climate Change Geoscience
Released2017 10 01
AbstractIcings were investigated near the Tibbitt to Contwoyto Winter Road to examine the relation of overflow timing to air and ground temperature, rainfall, and winter road construction. Icings developed before the end of active-layer freezeback by intermittent overflow of water from upstream lakes. Open-system freezing in saturated peat caused build-up of hydraulic pressure, leading to overflow. The active layer remained hydrologically active after the overflow period. The duration of the overflow period was positively related to autumn rainfall. As the hydrological regime in the Canadian Shield is moderated by bedrock thresholds, icing development depends on basin catchment size and antecedent conditions.
Summary(Plain Language Summary, not published)
This paper investigates icings near the Tibbitt to Contwoyto Winter Road, near Yellowknife, NT. Icings are a mass of layered ice that forms from successive overflows of water onto the ground or ice surface in winter. The relation between the timing of overflows and air and ground temperature, rainfall, and winter road operation are examined.
GEOSCAN ID302761