On the Use of Hydrological Models and Satellite Data to Study the Water Budget of River Basins Affected by Human Activities: Examples from the Garonne Basin of France

Sur l'utilisation des modèles hydrologiques et données par satellite pour étudier le bilan d'eau des bassins fluviaux touchés par les activités humaines : Exemples du bassin Garonne en France

Martin, E. ; Gascoin, S. ; Grusson, Y ; Murgue, C. ; Bardeau, M. ; Anctil, F. ; Ferrant, S. ; Lardy, R. ; Le Moigne, P. ; Leenhardt, D. ; Rivalland, V. ; Sanchez Perez, J.M. ; Sauvage, S. ; Therond, O.

Type de document
Chapitre d'ouvrage scientifique
Langue
Anglais
Affiliation de l'auteur
IRSTEA AIX EN PROVENCE UR RECOVER ; CESBIO UPS CNRS IRD CNES TOULOUSE FRA ; INTP UPS ECOLAB CASTANET TOLOSAN FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA ; BRGM RAMONVILLE SAINT AGNE FRA ; CHAIRE DE RECHERCHES EDS EN PRÉVISIONS ET ACTIONS HYDROLOGIQUES UNIVERSITE DE LAVAL QUEBEC CAN ; CESBIO UPS CNRS IRD CNES TOULOUSE FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA ; CNRS UMR 3589 CNRM GAME TOULOUSE FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA ; CESBIO UPS CNRS IRD CNES TOULOUSE FRA ; INTP UPS ECOLAB CASTANET TOLOSAN FRA ; INTP UPS ECOLAB CASTANET TOLOSAN FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA
Année
2016
Résumé / Abstract
Natural and anthropogenic forcing factors and their changes significantly impact water resources in many river basins around the world. Information on such changes can be derived from fine scale in situ and satellite observations, used in combination with hydrological models. The latter need to account for hydrological changes caused by human activities to correctly estimate the actual water resource. In this study, we consider the catchment area of the Garonne river (in France) to investigate the capabilities of space-based observations and up-to-date hydrological modelling in estimating water resources of a river basin modified by human activities and a changing climate. Using the ISBA–MODCOU and SWAT hydrological models, we find that the water resources of the Garonne basin display a negative climate trend since 1960. The snow component of the two models is validated using the moderate-resolution imaging spectroradiometer snow cover extent climatology. Crop sowing dates based on remote sensing studies are also considered in the validation procedure. Use of this dataset improves the simulated evapotranspiration and river discharge amounts when compared to conventional data. Finally, we investigate the benefit of using the MAELIA multi-agent model that accounts for a realistic agricultural and management scenario. Among other results, we find that changes in crop systems have significant impacts on water uptake for agriculture. This work constitutes a basis for the construction of a future modelling framework of the sociological and hydrological system of the Garonne river region.
Document d'origine
Remote sensing and water resources
Editeur
Springer

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