C-Degel Project

The « C-Degel » project aims to evaluate the impacts of surface run-off and groundwater flow on permafrost degradation. Thermal and mechanical behaviours of permafrost under changing conditions are simulated in a controlled environment. The focus is given to the comparisons between thawing triggered by water flow and air temperature (conducto-convective) and thawing triggered by air temperature only (conductive).

Many experiments are conducted in a cold room with physical active layer and pure ice models of permafrost subjected to different thawing modes (water, air) and conditions (temperatures, flow rate).

Applications of this project are extensive both for basic than applied research in a general context of global warming. A wide range of projects such as the study of ice wedge thermal erosion on Bylot Island (Nunavut) or the study of the impacts of groundwater flow on the thermal stability of embankment over permafrost at the Beaver Creek experimental site (Yukon) could be involved.

This project is funded by Transport Canada and is scientifically and logistically managed by Sabine Veuille (M. Sc.). Students Manuel Verpaelst (M.Sc. candidate), Simon Charbonneau (B.Sc. candidate), Michel Sliger (M. Sc. candidate) and Gautier Davesne (M. Sc. candidate) have actively participated to the experimental part of this project.

 

C-DEGEL1

Empty thawing cell

Cellule de dégel remplie de sable

Sand filled thawing cell

 

CDEGEL-Schematics

Set-up scheme

 

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