Base de données de recherche des TNO

chercheur principal: Gammon, Paul R
Année(s) de permis: 2019
Résumé: This licence has been issued for the scientific research application No.4544. The objectives of this research are: 1) To investigate the environmental chemistry of the borrow pits and immediate surrounding areas to determine what, if any, environmental risk do the elevated concentrations represent; 2) To investigate the environmental chemistry of an undisturbed area around the Inuvik to Tukto...

chercheur principal: Wolfe, Brent BBW
Année(s) de permis: 2019 2018
Résumé: The seven-year objective of Sub-Arctic Meteal Mobility Study (SAMMS) is to identify, quantify, and predict mobility of natural-source and legacy mine-source metals in soil, wetlands, and lake sediments that extend from former, present, and planned mine sites currently and as climate change alters the quantity and quality of dissolved organic matter produced and exported in subarctic NWT watersheds...

chercheur principal: Chételat, John
Année(s) de permis: 2019 2018
Résumé: This study will assess the present-day and future stability of legacy arsenic contamination stored in Yellowknife Bay sediments that originated from local gold mining activities. Using a combination of quantitative methods (field measurements, laboratory experiments, paleolimnology and mass balance modelling), the research team will estimate the diffusion of arsenic from sediments to overlying wat...

chercheur principal: Somers, Gila L
Année(s) de permis: 2018 2017 2016 2015 2014 2013
Résumé: Water quality monitoring equipment has been deployed at over 42 sites across the NWT to address community concerns. Community members were trained to use the following equipment: •YSI sondes: sit in the water and measure basic water quality parameters every 2 hours for up to 3 months. Analysis undertaken at ENR. •Grab water samples: measure basic parameters, nutrients, physicals, major ions,...

chercheur principal: Dudley, Judy
Année(s) de permis: 2018
Résumé: The purpose of the study is to verify baseline conditions within the Pine Point District study area. Field sites will be accessed by truck, on foot, and on ATVs during the ice-free growing season. The study may include analysis of previously disturbed sites to evaluate regeneration and succession, surveys of former mine pits, collection and analysis of surface water and groundwater samples, g...

chercheur principal: McGeer, Jim
Année(s) de permis: 2017
Résumé: The objectives of this research are to evaluate the relative sensitivity of northern aquatic invertebrates and northern ecosystems in comparison to southern species and environments. The focus of comparisons is in relation to the toxicity of metals. Three types of sample collections are proposed. These would be done at selected sites along the Ingraham Trail (highway 4) east of Yellowknife. The...

chercheur principal: Blais, Jules M
Année(s) de permis: 2017 2016 2015
Résumé: The research team propose to develop tools to assess risks associated with legacy industrial developments in a northern setting. The team will investigate contaminants from the Giant Mine near Yellowknife Northwest Territories (NT), which operated between 1948 and 2004, producing a legacy of contaminants including arsenic, antimony, hydrocarbons, mercury, and others. This remediation strategy appl...

chercheur principal: Chetelat, John
Année(s) de permis: 2016
Résumé: The research team will use natural environmental archives (lake sediment and peat cores) to characterize the forest fire history in the study region and test the relationship between fire events and metal accumulation over recent centuries. Study sites will be selected along a gradient of recent forest fire activity with some study sites located in areas of the latest burns (2014-15) to examine th...

chercheur principal: Chételat, John
Année(s) de permis: 2015
Résumé: The main objective of this study is to investigate the ecosystem health of Yellowknife Bay. We will address the following questions through a field study: 1) What is the quality of water and sediment in Yellowknife Bay (focusing on metals, nutrients and cyanobacteria)? 2) What are the main sources and transport pathways of metals accumulating in the food web of Yellowknife Bay? 3) How much of ...

chercheur principal: Chételat, John
Année(s) de permis: 2014 2013
Résumé: Yellowknife Bay on Great Slave Lake is a water body of cultural, subsistence and recreational importance for the Yellowknives Dene First Nation (YKDFN) and residents of Yellowknife. The ecosystem health of Yellowknife Bay has been impacted by historical mining releases of metals (particularly arsenic), as well as long-range atmospheric transport of metals such as mercury from far-away human emissi...