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 de la France

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

Type de document
Article de revue scientifique à comité de lecture
Langue
Anglais
Affiliation de l'auteur
IRSTEA AIX EN PROVENCE UR RECOVER FRA ; IRD UNIVERSITE DE TOULOUSE III CNRS UMR 5126 CESBIO TOULOUSE FRA ; CNRS UMR 5245 ECOLAB CASTANET TOLOSAN FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA ; BRGM RAMONVILLE SAINT AGNE FRA ; UNIVERSITE DE LAVAL DEPARTEMENT DE GENIE CIVIL QUEBEC CAN ; IRD UNIVERSITE DE TOULOUSE III CNRS UMR 5126 CESBIO TOULOUSE FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA ; METEO FRANCE CNRS CNRM GAME TOULOUSE FRA ; INRA UMR AGIR CASTANET TOLOSAN FRA ; IRD UNIVERSITE DE TOULOUSE III CNRS UMR 5126 CESBIO TOULOUSE FRA ; CNRS UMR 5245 ECOLAB CASTANET TOLOSAN FRA ; CNRS UMR 5245 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 modeling 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 modeling framework of the sociological and hydrological system of the Garonne river region.
Source
Surveys in Geophysics, vol. 37, num. 2, p. 223 - 247

puce  Accés à la notice sur le site Irstea Publications / Display bibliographic record on Irstea Publications website

  Texte intégral / Full text

  Liste complète des notices de CemOA