Identification of avalanche-prone areas through topographic analysis in Nunavik ... : Identification des zones propices aux avalanches par analyses topographiques au Nunavik ...
Nunavik, a northern Quebec region located beyond the 55th northern parallel and characterized by a hilly terrain, presents topographic and meteorological conditions that may lead to slope hazards. Some villages are located in glacial valleys (e.g., Umiujaq, Salluit, Kangiqsualujjuaq), while climate...
| Main Authors: | , , |
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| Format: | Still Image |
| Language: | English |
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LabEx DRIIHM
2024
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.34972/driihm-fcb73e https://hal.science/hal-04622258 |
| Summary: | Nunavik, a northern Quebec region located beyond the 55th northern parallel and characterized by a hilly terrain, presents topographic and meteorological conditions that may lead to slope hazards. Some villages are located in glacial valleys (e.g., Umiujaq, Salluit, Kangiqsualujjuaq), while climate changes are increasing snowfall and winter thawing episodes, gathering frequent avalanche-prone conditions. The rapid population growth in the Inuit communities in permafrost thawing context lead to village expansion towards potential avalanche-prone areas, resulting in further exposure of inhabitants. However, historical data on slope events are very limited or nonexistent, thus there is a need to update and enhance knowledge related to avalanche conditions in Nunavik. This research, conducted in close collaboration with local communities and the Kativik Regional Government (KRG), relies on LiDAR data, satellite images, and photographs taken with automatic trigger cameras (ReconyxTM Hyper Fire2). Considered ... : Le Nunavik, un territoire québécois situé au nord du 55e parallèle et caractérisé par un relief peu accidenté, présente des conditions topographiques et météorologiques propices aux aléas de versant. Certains villages sont situés dans des vallées glaciaires (p. ex. Umiujaq, Salluit, Kangiqsualujjuaq), alors que les changements climatiques augmentent les précipitations neigeuses et les épisodes de redoux générant des conditions qui favorisent l’occurrence d’avalanches. La forte croissance démographique enregistrée dans les communautés inuites en contexte de dégel du pergélisol force l’extension des villages vers des zones potentiellement propices aux avalanches, accentuant l’exposition des habitants. Les données historiques et scientifiques des événements de versant étant très limitées, voire inexistantes, il importe d’actualiser les connaissances relatives aux conditions avalancheuses au Nunavik. Cette recherche, réalisée en étroite collaboration avec les communautés locales et l’Administration régionale ... |
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