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Title

Impact of warming climate on water management for the Ariege River basin (France)

Publication Year

2013

Author(s)
  • Hendrickx, F.
  • Sauquet, E.
Source
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES Volume: 58 Issue: 5 Pages: 976-993 Published: 2013
ISSN
0262-6667
Abstract

The French national project IMAGINE2030 aims to assess future water availability in the Garonne River basin (southwest France) by taking account of changes in both climate and water management in the 2030s. Within this project, two mountainous drainage basins located in the Pyrenees were examined to assess the specific impact of climate change on reservoir management. The Salat River basin at Roquefort, is considered as a proxy (representative of a natural basin), whereas the Ariege River at Foix is influenced by hydropower production in winter and by water releases to sustain low flows in summer. The Cequeau rainfall-runoff model, combined with a simplified model of reservoir management operations, was calibrated on present-day conditions and forced with climate projections derived from the IPCC AR4 report. The results show that a warming climate over the basins induces a decrease in mean annual runoff, a shift to earlier snow melting in mountainous areas and more severe low-flow conditions. The simulations show a decrease in electricity generation. Under two water management scenarios (one business-as-usual and the other incorporating an increased downstream water demand in compliance with requirements for increased minimum flow), simulations for the Ariege River basin suggest an earlier filling of the reservoir is necessary in winter to anticipate the increased release from reservoirs in summer to support minimum flow farther downstream. Editor Z.W. Kundzewicz; Associate editor D. Hughes Citation Hendrickx, F. and Sauquet, E., 2013. Impact of warming climate on water management for the Ariege River basin (France). Hydrological Sciences Journal, 58 (5), 976-993. Resume Le projet national francais IMAGINE2030 examine l'evolution de la ressource en eau et ses consequences sur la gestion dans le bassin de la Garonne a l'horizon 2030. Deux bassins de montagne ont ete particulierement etudies pour mesurer l'impact du changement climatique sur la gestion des ouvrages hydrauliques. Le Salat a Roquefort est un bassin de montagne, considere comme temoin naturel, tandis que l'Ariege a Foix est influencee par la production hydroelectrique en hiver et le soutien d'etiage en ete. Le modele hydrologique Cequeau, combine a un module simplifie representant les manOEuvres aux ouvrages, a ete cale sur des donnees representatives de la situation actuelle et alimente par des projections climatiques etablies sur la base de l'exercice AR4 du GIEC (IPCC). Les resultats montrent des apports annuels en baisse, une fonte de la neige plus precoce et une severite accrue des etiages en reponse a des temperatures plus elevees des 2030 et plus specifiquement une diminution de la production electrique sur le bassin de l'Ariege a Foix. En considerant deux scenarios de gestion, le premier << business as usual >> et le second integrant une demande aval accrue au travers de l'augmentation du debit minimal a respecter, un remplissage avance des reservoirs sur l'Ariege est necessaire pendant l'hiver pour anticiper une contribution plus forte de ces reservoirs au soutien d'etiage estival en aval. Citation Hendrickx, F. and Sauquet, E., 2013. Impact of warming climate on water management for the Ariege River basin (France). Hydrological Sciences Journal, 58 (5), 976-993.

Author Keyword(s)
  • water management
  • climate change
  • hydropower
  • low flow
  • Garonne
  • France
  • gestion de l'eau
  • changement climatique
  • hydro-electricite
  • etiage
KeyWord(s) Plus
  • PACIFIC-NORTHWEST
  • CHANGE SCENARIOS
  • FLOOD FREQUENCY
  • RESOURCES
  • HYDROPOWER
  • HYDROLOGY
  • MODEL
  • SIMULATION
  • CALIFORNIA
  • PLANS
ESI Discipline(s)
  • Engineering
  • Environment/Ecology
Web of Science Category(ies)
  • Water Resources
Adress(es)

[Hendrickx, F.] EDF Res & Dev, LNHE, F-78401 Chatou, France; [Sauquet, E.] Irstea, UR HHLY, F-69626 Villeurbanne, France

Reprint Adress

Hendrickx, F (reprint author), EDF Res & Dev, LNHE, 6 Quai Watier, F-78401 Chatou, France.

Country(ies)
  • France
CNRS - Adress(es)
    Accession Number
    WOS:000321173000003
    uid:/2CHXBFZJ
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