Preprints
https://doi.org/10.5194/egusphere-2022-1442
https://doi.org/10.5194/egusphere-2022-1442
19 Jan 2023
 | 19 Jan 2023

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

Aude Vincent, Clémence Daigre, Ophélie Fischer, Guðfinna Aðalgeirsdóttir, Sophie Violette, Jane Hart, Snævarr Guðmundsson, and Finnur Pálsson

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.

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Aude Vincent, Clémence Daigre, Ophélie Fischer, Guðfinna Aðalgeirsdóttir, Sophie Violette, Jane Hart, Snævarr Guðmundsson, and Finnur Pálsson

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-1442', Anonymous Referee #1, 07 Feb 2023
    • AC1: 'Reply on RC1', Aude Vincent, 10 Feb 2023
  • RC2: 'Comment on egusphere-2022-1442', Christophe Cudennec, 06 Mar 2023
    • AC2: 'Reply on RC2', Aude Vincent, 22 Mar 2023
Aude Vincent, Clémence Daigre, Ophélie Fischer, Guðfinna Aðalgeirsdóttir, Sophie Violette, Jane Hart, Snævarr Guðmundsson, and Finnur Pálsson
Aude Vincent, Clémence Daigre, Ophélie Fischer, Guðfinna Aðalgeirsdóttir, Sophie Violette, Jane Hart, Snævarr Guðmundsson, and Finnur Pálsson

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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.