Base de données de recherche des TNO

étiquettes: physical sciences, permafrost, hydrology, water chemistry

Objectif(s): To determine the water cycle processes acting in watersheds that could affect the streamflow response and water chemistry of Taiga Shield streams.

Description du projet: It is the objective of this research to determine the water cycle processes acting in watersheds that could affect the streamflow response and water chemistry of Taiga Shield streams. The proposed work will take place within a research basin framework. The proposed watershed, the upper reaches of Baker Creek, is a typical Canadian Shield stream that drains 150 km2 into Great Slave Lake. There is significant existing infrastructure from which to build a strong field program that includes several Environment Canada climate towers, and a Water Survey of Canada hydrometric gauge. Snow surveys will be conducted each spring by taking ten snow depth measurements and six snow samples each at ten snow course sites. Streamflow will be measured at eight sites along Baker Creek with water depth sensors placed into the water in the spring and periodic stream velocity measurements by wading across the stream with a velocity sensor on a rod. Evaporation from selected lakes will be estimated using water temperature measured with thermistor strings on anchored floats. Water in the soil will be measured with shallow wells (less than a metre deep) and placing soil moisture sensors nearby. Weather conditions will be measured at two climate towers. Water samples will be taken at the streamflow sites and analyzed for chemistry and stable isotopes. Field observations will be made throughout the year. Informal discussions that help bridge scientific and traditional knowledge perspectives on the local dynamics of the water cycle between the investigator and the local First Nations could benefit both by the exchange of ideas. It is the investigator's intention to report regularly on the progress of the research with the Yellowknives Dene First Nation, North Slave Metis Alliance, Tlicho Government and local GNWT water managers to ensure the transfer of knowledge for the benefit of northerners. This exchange could range from annual progress reports to individual face-to-face meetings to community meetings, as time and resources permit. Unfortunately, funds for the project are limited, and there are presently no employment opportunities for northerners, but other funding sources are being pursued. Beyond submitting annual reports to the Aurora Research Institute, it is the investigator's intention to discuss with the Yellowknives Dene First Nation, Tlicho Government and North Slave Metis Alliance the aspects of the hydrological research that could provide for synergies between the investigator's research goals and issues these groups believe are of importance. It is the investigator's intention to report regularly on the progress of the research. This exchange could range from annual progress reports to face-to-face meetings, to community meetings, as time and resources permit. The fieldwork for this study will be conducted from April 11, 2016 to December 31, 2016.