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Communication Dans Un Congrès Année : 2020

Modelling glaciers bed overdeepenings and possible future lakes in deglaciating landscapes of the French Alps

Maeva Cathala
  • Fonction : Auteur
Andreas Linsbauer
  • Fonction : Auteur
Wilfried Haeberli
  • Fonction : Auteur
Ludovic Ravanel
Philip Deline
  • Fonction : Auteur

Résumé

Alpine glacier retreat due to global warming generates major landscape changes in high mountain environments. New lakes can potentially form in Glaciers Bed Overdeepenings (GBOs). Those new water bodies, sometimes located near potentially instable slopes or behind unstable moraine dams, can increase outburst flood hazards, generating risks for valley floors. Such GLOF events (Glacial Lake Outbrust Floods) can result from displacement waves triggered by rock fall into lakes and/or sudden dam breaching. Those events can travel far down to low altitude areas and turning into high magnitude debris flows. Beyond the threats, those lakes can also represent opportunities for tourism, hydropower production or fresh water supply.
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Dates et versions

hal-03260691 , version 1 (15-06-2021)

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Citer

Maeva Cathala, Florence Magnin, Andreas Linsbauer, Wilfried Haeberli, Ludovic Ravanel, et al.. Modelling glaciers bed overdeepenings and possible future lakes in deglaciating landscapes of the French Alps. EGU General Assembly, May 2020, Online, Austria. ⟨10.5194/egusphere-egu2020-21229⟩. ⟨hal-03260691⟩
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