Recent advances in rock wall permafrost modelling to understand bedrock failure
International audience A recent increase in the rate of failure in periglacial rick walls has been attributed to permafrost degradation. To validate this hypothesis, we applied a simple transient thermal model to hundreds of observed rockfalls in the Mont Blanc massif and determine the statistical r...
Main Authors: | , , , , , |
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Other Authors: | , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03260747 https://hal.archives-ouvertes.fr/hal-03260747/document |
Summary: | International audience A recent increase in the rate of failure in periglacial rick walls has been attributed to permafrost degradation. To validate this hypothesis, we applied a simple transient thermal model to hundreds of observed rockfalls in the Mont Blanc massif and determine the statistical relationship between rock wall temperature dynamics and failure occurrence. This is a first step towards prediction of rockfall probability. To improve our understanding of the processes leading to failure, we made a first attempt to cpuple thermal and hydrological models.The role of water flowing through bedrock fractures enhances the rate of permafrost degradation and affects the pressure field distribution. |
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