| Title | Overflow observations near the Tibbitt to Contwoyto Winter Road, NT |
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| Author | Sladen, W E; Burn, C R; Wolfe, S A |
| Source | Proceedings, GeoOttawa 2017, the 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conferenc; 2017 p. 1-8 |
| Year | 2017 |
| Alt Series | Natural Resources Canada, Contribution Series 20170109 |
| Publisher | Canadian Geotechnical Society (Richmond, BC, Canada) |
| Meeting | GeoOttawa 2017, the 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference; Ottawa, ON; CA; October 1-4, 2017 |
| Document | book |
| Lang. | English |
| Media | paper; digital |
| File format | pdf |
| Province | Northwest Territories; Nunavut |
| NTS | 75K; 75L; 75M; 75N; 76C; 76D; 76E; 76F; 85I; 85J; 85O; 85P; 86A; 86B; 86G; 86H |
| Area | Tibbitt Lake; Contwoyto Lake; Yellowknife |
| Lat/Long WENS | -116.0000 -109.0000 66.0000 62.5000 |
| Subjects | surficial geology/geomorphology; hydrogeology; Transport; Nature and Environment; groundwater; permafrost; temperature; precipitation; peat; hydraulic analyses; hydrologic environment; watersheds;
modelling; meteorology; surface waters; lakes; Road networks; Road construction; icings |
| Illustrations | location maps; photographs; tables; graphs; time series; histograms; flow diagrams; models; schematic representations |
| Program | Climate Change Geoscience Land-based Infrastructure |
| Released | 2017 10 01 |
| Abstract | Icings 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 ID | 302761 |
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