Gabriel Chiasson-Poirier

Université de Montréal | UdeM · Department of Geography

Key Points:  High resolution mapping of frost table depths revealed the emergence of a pattern of uneven active layer thaw.  Hillslope structure and thaw processes created two distinct fill-and-spill domains; a surface domain and a subsurface domain.  Streamflow chemistry data indicate three distinct periods of streamflow generation during activ...

1 minute video that summarize hydrologic research in an Arctic watershed. Implications and methodology! Link to Science Action contest of the Natural Sciences and Engineering Research Council of Canada: https://www.youtube.com/watch?v=Vj5Rde52r94&feature=youtu.be

Field methodology and preliminary results of field season 2016

Presentation of some of the preliminary results from our project that is part of the ArcticNet’s Water Security and Quality in a Changing Arctic program led by Queen’s University. We are looking at the impact of geomorphic controls on groundwater discharge patterns and thermal dynamics within the Niaqunguk (Apex) River watershed.

In its 2010 General Plan, theCity of Iqaluit identified the Niaqunguk River as a supplemental potable-water source. Knowledge about subsurface flows, one of the major sources of water for rivers during the baseflow period, is still limited in permafrost environments. Groundwater flow paths and their connections with surface water remain difficult t...

Recent research suggests that climate warming could be impacting the hydrology of Arctic river systems. Long term discharge records in some Arctic catchments indicate a significant reduction in the ratio of maximum to minimum annual discharge, suggesting an increased importance of subsurface flows and groundwater discharge.1 In most catchments, the...

The localization of groundwater input in the Apex River have been possible by using groundwater tracers (temperature, specific conductance). The success of this method depends on the contrast between groundwater and surface water characteristic, causing anomalies in surface water characteristics when groundwater discharge occurs (Stonestrom, 2003,...