Mapping potential release areas and modelling runout distances of permafrost rock slope failures at regional scale for hazard assessment

• Main Authors: Cathala, Maëva, Magnin, Florence, Ravanel, Ludovic, Dorren, Luuk, Berger, Frédéric, Bourrier, Franck, Zuanon, Nicolas, Deline, Philip
• Other Authors: Environnements, Dynamiques et Territoires de Montagne (EDYTEM), Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS), Haute école des sciences agronomiques, forestières et alimentaires (HAFL), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), A2 Photonic Sensors (A2PS), University of Bergen, Institute of Earth Sciences
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2022
• Subjects: [SDE.ES]Environmental Sciences/Environment and Society; [SDE]Environmental Sciences; [SDE.MCG]Environmental Sciences/Global Changes; glacier; Iceland; permafrost
• Online Access: https://hal.science/hal-03883109; https://hal.science/hal-03883109/document; https://hal.science/hal-03883109/file/Cathala_Poster_NGWM_2.pdf

International audience High mountains environments are highly affected by climate change through glacier retreat and permafrost degradation. These phenomena may cause rock slope failures, sometimes provoking far-reaching cascading processes threatening human lives and infrastructure. Increasing knowledge on the triggering mechanism and propagation is therefore required to propose adaptation strategies. In the French Alps, permafrost mapping and extensive rockfall inventories provide relevant data for statistical analysis of their triggering conditions and mobility. In accordance with the GAPHAZ guidelines for hazard assessment (GAPHAZ, 2017), the aims of this study are: (i) to propose a mapping approach of susceptible release areas of rock slope failures and resulting runout distances at a regional scale (French Alps), and (ii) to identify hotspots for further hazard assessment.