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CONSTRUCTION POTENTIAL MAPS IN SUPPORT TO CLIMATE CHANGE ADAPTATION AND MANAGEMENT STRATEGIES FOR COMMUNITIES BUILT ON PERMAFROST : CASE STUDIES FROM NORTHERN QUEBEC
Session: Northern Communities / Communautés nordiques
Andrée-Sylvie Carbonneau, Centre d'études nordiques - Université Laval (Canada)
Emmanuel L'Hérault, Centre d'études nordiques - Université Laval (Canada)
Sarah Aubé-Michaud, Centre d'études nordiques - Université Laval (Canada)
Diane Frappier, Ministère des Affaires Municipales et de l’Occupation du Territoire (MAMOT) (Canada)
Michel Allard, Centre d'études nordiques - Université Laval (Canada)
As ongoing climate warming is expected to continue in northern Quebec, the thermal regime and the dynamics of permafrost will be altered. Adequate land use planning must take into account the potential loss of bearing capacity and soil instability due to permafrost degradation.To guide residential and industrial development, an integrated and GIS based geoscience approach was developed to assess permafrost geotechnical properties and map permafrost conditions. Using a multicriteria analysis, terrain sensitive to thaw-settlement, mass movements or other risks related to hazards were then identified. The results are presented as construction potential maps where, for any given terrain category, the suitable foundation types according to the existing engineering solution guidelines are proposed. The high varability of the permafrost conditions across the territory and at the community scale raises specific challenges for land use planning. Using as examples the community of Akulivik and Kangiqsualujjuaq, this paper illustrates the potential of those maps as a tool to support community adaptation and management strategies under a changing climate.
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