Modeling rockwall permafrost to understand periglacial rock slope failures
Rock slope failures are increasingly affecting high mountain rock walls, notably during hot summers (e.g. Ravanel et al., 2017). The common presence of ice in rock fall scars evidences the likely role of permafrost (i.e. ground which temperature is permanently ≤ 0°C) in rock fall triggering. Laborat...
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ftunivsavoie:oai:HAL:hal-04055509v1 2024-02-11T10:04:38+01:00 Modeling rockwall permafrost to understand periglacial rock slope failures Magnin, Florence Deline, Philip Duvillard, Pierre-Allain Josnin, Jean-Yves Legay, Alexandre Ravanel, Ludovic 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) ANR-19-CE01-0018,WISPER,Processus thermo-mécaniques liés à l'eau et à la glace dans les fractures des parois alpines à permafrost(2019) Chambéry, France 2021-11-17 https://hal.science/hal-04055509 en eng HAL CCSD hal-04055509 https://hal.science/hal-04055509 Symposium Rock Slope Stability 2021 https://hal.science/hal-04055509 Symposium Rock Slope Stability 2021, Nov 2021, Chambéry, France [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2021 ftunivsavoie 2024-01-23T23:35:47Z Rock slope failures are increasingly affecting high mountain rock walls, notably during hot summers (e.g. Ravanel et al., 2017). The common presence of ice in rock fall scars evidences the likely role of permafrost (i.e. ground which temperature is permanently ≤ 0°C) in rock fall triggering. Laboratory tests and mechanical models suggest that several permafrost-related processes influence bedrock stability (e.g. Krautblatter et al., 2013). Alteration of ice in joints due to the conductive heat transfer from the surface to depth, and advective heat flux by water infiltration in the fractures are thought to be the dominant processes in permafrost degradation (i.e. warming and thawing) causing rock wall destabilization. Water infiltration could also provoke high hydrostatic pressures at perched water table formed by the permafrost body and ice-filled fractures. To assess high mountain rock wall stability, it is thus important to know how permafrost is distributed, evolves, and interacts with hydrological processes. We here present recent developments in modelling rock wall permafrost and how models can help understanding rock slope destabilization at various space and time scales. Conference Object Ice permafrost Université Savoie Mont Blanc: HAL |
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Open Polar |
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Université Savoie Mont Blanc: HAL |
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ftunivsavoie |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Magnin, Florence Deline, Philip Duvillard, Pierre-Allain Josnin, Jean-Yves Legay, Alexandre Ravanel, Ludovic Modeling rockwall permafrost to understand periglacial rock slope failures |
topic_facet |
[SDE]Environmental Sciences |
description |
Rock slope failures are increasingly affecting high mountain rock walls, notably during hot summers (e.g. Ravanel et al., 2017). The common presence of ice in rock fall scars evidences the likely role of permafrost (i.e. ground which temperature is permanently ≤ 0°C) in rock fall triggering. Laboratory tests and mechanical models suggest that several permafrost-related processes influence bedrock stability (e.g. Krautblatter et al., 2013). Alteration of ice in joints due to the conductive heat transfer from the surface to depth, and advective heat flux by water infiltration in the fractures are thought to be the dominant processes in permafrost degradation (i.e. warming and thawing) causing rock wall destabilization. Water infiltration could also provoke high hydrostatic pressures at perched water table formed by the permafrost body and ice-filled fractures. To assess high mountain rock wall stability, it is thus important to know how permafrost is distributed, evolves, and interacts with hydrological processes. We here present recent developments in modelling rock wall permafrost and how models can help understanding rock slope destabilization at various space and time scales. |
author2 |
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) ANR-19-CE01-0018,WISPER,Processus thermo-mécaniques liés à l'eau et à la glace dans les fractures des parois alpines à permafrost(2019) |
format |
Conference Object |
author |
Magnin, Florence Deline, Philip Duvillard, Pierre-Allain Josnin, Jean-Yves Legay, Alexandre Ravanel, Ludovic |
author_facet |
Magnin, Florence Deline, Philip Duvillard, Pierre-Allain Josnin, Jean-Yves Legay, Alexandre Ravanel, Ludovic |
author_sort |
Magnin, Florence |
title |
Modeling rockwall permafrost to understand periglacial rock slope failures |
title_short |
Modeling rockwall permafrost to understand periglacial rock slope failures |
title_full |
Modeling rockwall permafrost to understand periglacial rock slope failures |
title_fullStr |
Modeling rockwall permafrost to understand periglacial rock slope failures |
title_full_unstemmed |
Modeling rockwall permafrost to understand periglacial rock slope failures |
title_sort |
modeling rockwall permafrost to understand periglacial rock slope failures |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-04055509 |
op_coverage |
Chambéry, France |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Symposium Rock Slope Stability 2021 https://hal.science/hal-04055509 Symposium Rock Slope Stability 2021, Nov 2021, Chambéry, France |
op_relation |
hal-04055509 https://hal.science/hal-04055509 |
_version_ |
1790601318569607168 |