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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 22 May 2019

Submitted as: research article | 22 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).

The AquiFR hydrometeorological modelling platform as a tool for improving groundwater resource monitoring over France: evaluation over a 60 year period

Jean-Pierre Vergnes1, Nicolas Roux2, Florence Habets3,4, Philippe Ackerer5, Nadia Amraoui1, François Besson6, Yvan Caballero1, Quentin Courtois7, Jean-Raynald de Dreuzy7, Pierre Etchevers6, Nicolas Gallois8, Delphine J. Leroux2, Laurent Longuevergnes7, Patrick Le Moigne2, Thierry Morel9, Simon Munier2, Fabienne Regimbeau6, Dominique Thiéry1, and Pascal Viennot8 Jean-Pierre Vergnes et al.
  • 1BRGM French Geological Survey, Water Environment and Ecotechonologies Division, Orléans Cedex 2, France
  • 2GAME/CNRM, Météo France, CNRS, Toulouse, France
  • 3CNRS/Sorbonne University, UMR 7619 Métis, Paris Cedex 5, France
  • 4Laboratoire de Géologie, Ecole normale supérieure, PSL Research University, CNRS UMR 8538, 24 rue Lhomond, 75005 Paris, France
  • 5LHYGES, UMR 7517 CNRS, EOST / Université de Strasbourg, France
  • 6METEO-FRANCE/DCSC, Toulouse, France
  • 7Géosciences Rennes, UMR 6118, CNRS, Université de Rennes I, Rennes, France
  • 8Centre de Géosciences, MINES ParisTech, Fontainebleau, France
  • 9CERFACS, Toulouse, France

Abstract. The new AquiFR hydometeorological modelling platform was developed to provide short to long-term forecasts for groundwater resource management in France. The present study aims to describe and assess this new tool over a long-term period of 60 years. This platform gathers in a single numerical tool different hydrogeological models covering much of the French metropolitan area. Eleven aquifer systems are simulated through spatially distributed models using either the MARTHE groundwater modelling software or the EauDyssée hydrogeological platform. Twenty-three karstic systems are simulated by lumped models using the EROS software. AquiFR computes the groundwater level, the groundwater surface water exchanges, and the river flows at multiple river gauging stations. A simulation covering a 60 year period from 1958 to 2018 is achieved in order to evaluate the performance of this platform. The 8 km resolution SAFRAN meteorological reanalysis provides the atmospheric variables needed by the SURFEX land surface model in order tocompute surface runoff that are used by all the hydrogeological models. The assessment is based on a wide range of selected piezometers as well as gauging stations corresponding to simulated rivers and outlets of karstic systems. For the simulated piezometric heads, 40 % and 60 % of the absolute biases are lower than 2 m and 4 m respectively. The Standardized Piezometric Level Index (SPLI) was computed to assess the ability of AquiFR to identify extreme events such as groundwater flooding or droughts in long-term simulations over a set of piezometers used for groundwater resource management. 55 % of the Nash-Sutcliff scores calculated between the observed and simulated SPLI time series are greater than 0.5. Further work will focus on the use of this platform for short-term to seasonal forecasts in an operational mode and for climate change impact assessment.

Jean-Pierre Vergnes et al.
Interactive discussion
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Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Jean-Pierre Vergnes et al.
Jean-Pierre Vergnes et al.
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Publications Copernicus
Short summary
The AquiFR hydrogeological modelling platform aims to provide over France short-term to seasonal hydrological forecast for daily water management and long-term simulations for climate impact studies. The results described in this study confirm the feasibility of gathering independent groundwater model into the same numerical tool. This new tool encourages the development of groundwater modelling and it has the potential to be a valuable tool for many operational and research applications.
The AquiFR hydrogeological modelling platform aims to provide over France short-term to seasonal...