Preprints
https://doi.org/10.5194/egusphere-2022-1442
https://doi.org/10.5194/egusphere-2022-1442
 
19 Jan 2023
19 Jan 2023
Status: this preprint is open for discussion.

A hydrogeological conceptual model of aquifers in catchments headed by temperate glaciers

Aude Vincent1,2, Clémence Daigre2, Ophélie Fischer2, Guðfinna Aðalgeirsdóttir1, Sophie Violette2,3, Jane Hart4, Snævarr Guðmundsson5, and Finnur Pálsson1 Aude Vincent et al.
  • 1Glaciology Team, Institute of Earth Sciences, University of Iceland, Askja, Sturlugata 7, IS-101 Reykjavík, Iceland
  • 2Geology Laboratory, École Normale Supérieure - PSL & CNRS, UMR.8538, 24 rue Lhomond, 75231, Paris Cedex, France
  • 3UFR.918, Sorbonne University, 4, Place Jussieu, 75252, Paris Cedex, France
  • 4Geography and Environmental Science, University of Southampton, Southampton SO17 1BJ, UK
  • 5South East Iceland Nature Research Center, Nýheimar, Litlubrú 2, IS-780 Höfn í Hornafirði, Iceland

Abstract. Achieving understanding and quantification of unknown aquifer systems in glacial context is crucial to forecast the evolution under climate change of water resources and of potential floods and landslides hazards. We focus on four south-eastern outlet glaciers of the main Icelandic icecap, Vatnajökull. New data are being acquired in the field to characterise groundwater dynamics. From this we propose a hydrogeological conceptual model: two distinct aquifers and their hydraulic conductivities are identified. A comprehensive water balance at the scale of the watershed has been obtained. Recharge to the aquifers is 4 times higher under the glaciers than on the plain, and we demonstrate the glacial melt recharge impact on the groundwater dynamic.

Aude Vincent et al.

Status: open (until 16 Mar 2023)

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Aude Vincent et al.

Aude Vincent et al.

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Short summary
We studied groundwater near outlet glaciers of the main Icelandic icecap. We acquired new data in the field. Two distinct groundwater compartments and their characteristics are identified. We demonstrate the glacial melt recharge impact on the groundwater dynamic. Knowing groundwater systems in glacial context is crucial to forecast the evolution under climate change of water resources and of potential floods and landslides hazards.