Régions: Inuvialuit Settlement Region
étiquettes: physical sciences, environmental impact, active layer, permafrost, vegetation, climate change, prediction models, surface water, atmospheric sciences, flooding, snow accumulation, snow water equivalence, runoff model, nutrient levels, runoff process, thermal regime, catchment drainage, suspended sediment, water budget
| chercheur principal: | Marsh, Philip (37) |
| Nᵒ de permis: | 13035 |
| Organisation: | Environment Canada |
| Année(s) de permis: |
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1990
|
| Délivré: | avr. 19, 1999 |
| Équipe de projet: | Dr. J. Pomeroy, Mr. C. Onclin, Mr. M. Russell, Dr. B. Quinton, Ms. N. Neumann, Dr. W. Rouse |
Objectif(s): The primary objective of this project is to develop improved understanding of the fluxes of water and energy in northern regions, and to develop improved computer models of these processes. This work is an important contribution to the Canadian GEWEX program, which is aimed at developing an improved understanding of both the atmospheric and land surface water budgets of the Mackenzie Basin. This work will provide improved techniques for predicting a wide range of environmental impacts in northern areas, including potential climate change impacts. In detail, this work will include studies of the rates of and processes controlling: accumulation of snow, snow melt, water flux through snow; exchange of water between snowcover, active layer and permafrost: movement of solutes and nutrients through the snowcover and to the stream channel; the effect of snow/soil temperature regime and vegetation types of runoff processes; evaporation processes; and development of physically based, predictive models of snow melt runoff.
Description du projet: The Trail Valley Creek site will be accessed by Twin Otter, helicopter and snowmobile, while the Havikpak Creek site will be accessed by foot and snowmobile. We plan to have a small field crew at each site to measure the amount of snow on the ground in the middle of April, and to again return to measure snow melt and the streamflow in mid to late May. Actual timing of the spring melt trip will depend on weather conditions. In addition, we would plan a short trip in September to conduct instrument maintenance. Instrumentation at each site includes a variety of weather instruments and instruments for measuring soil temperature and moisture. We will also supplement the Water Survey of Canada instruments for estimating streamflow. This will include a dye dilution system, where a standard water tracing dye is injected into the rivers at extremely low concentrations (less than 10 parts per billion). Once in the stream, the dye will be invisible, and will be at a concentration which is approved for drinking water.
