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On the inclusion of ground-based gravity measurements to the calibration process of a global rainfall-discharge reservoir model: case of the Durzon karst system (Larzac, southern France) |
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| Authors: | Naomi Mazzilli Hervé Jourde Thomas Jacob Vincent Guinot Nicolas Le Moigne Marie Boucher Konstantinos Chalikakis Hélène Guyard Anatoly Legtchenko |
| Affiliation: | 1. HydroSciences Montpellier, UMR CNRS/IRD/UM2 5569, Université Montpellier 2, CC MSE, 34095, Montpellier Cedex 5, France 2. BRGM, 3 av. C. Guillemin, 45060, Orléans Cedex, France 5. Géosciences Montpellier, UMR 5243 CNRS/UM2, Université Montpellier 2, Montpellier, France 3. Laboratoire d’étude des Transferts en Hydrologie et Environnement, UMR 5564 CNRS/G-INP/IRD/UJF, Grenoble, France 4. Laboratoire d’Hydrogéologie d’Avignon, UMR 1114 UAPV/INRA, Avignon, France |
| Abstract: | This work examines the relevance of the inclusion of ground-based gravity data in the calibration process of a global rainfall-discharge reservoir model. The analysis is performed for the Durzon karst system (Larzac, France). The first part of the study focuses on the hydrological interpretation of the ground-based gravity measurements. The second part of the study investigates further the information content of the gravity data with respect to water storage dynamics modelling. The gravity-derived information is found unable to either reduce equifinality of the single-objective, discharge-based model calibration process or enhance model performance through assimilation. |
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