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- Title
The AquiFR hydrometeorological modelling platform as a tool for improving groundwater resource monitoring over France: evaluation over a 60 year period.
- Authors
Vergnes, Jean-Pierre; Roux, Nicolas; Habets, Florence; Ackerer, Philippe; Amraoui, Nadia; Besson, François; Caballero, Yvan; Courtois, Quentin; de Dreuzy, Jean-Raynald; Etchevers, Pierre; Gallois, Nicolas; Leroux, Delphine J.; Longuevergnes, Laurent; Le Moigne, Patrick; Morel, Thierry; Munier, Simon; Regimbeau, Fabienne; Thiéry, Dominique; Viennot, Pascal
- 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.
- Subjects
FRANCE; HYDROGEOLOGY; GROUNDWATER monitoring; HYDROGEOLOGICAL modeling; GROUNDWATER management; WATER table; WATER
- Publication
Hydrology & Earth System Sciences Discussions, 2019, p1
- ISSN
1812-2108
- Publication type
Article
- DOI
10.5194/hess-2019-166