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Communication Dans Un Congrès Année : 2017

Recent advances in rock wall permafrost modelling to understand bedrock failure

J-y Josnin
  • Fonction : Auteur
A Legay
  • Fonction : Auteur
Ludovic Ravanel
P Deline
  • Fonction : Auteur
P A Duvillard
  • Fonction : Auteur

Résumé

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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Dates et versions

hal-03260747 , version 1 (07-09-2021)

Identifiants

  • HAL Id : hal-03260747 , version 1

Citer

Florence Magnin, J-y Josnin, A Legay, Ludovic Ravanel, P Deline, et al.. Recent advances in rock wall permafrost modelling to understand bedrock failure. International Association of Geomorphologists Webminar, Mar 2021, Online, France. ⟨hal-03260747⟩
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