Vieux R.E., Looper J.P., Cappelaere Bernard, Peugeot Christophe, Maia A. (1998). Exploring climatic impacts on water resources in West Niger, Africa. In :
Servat Eric (ed.), Hughes D. (ed.), Fritsch Jean-Marie (ed.), Hulme Mike (ed.). Water resources variability in Africa during the 20th century = Variabilité des ressources en eau en Afrique au 20ème siècle. Wallingford : AISH, p. 347-354. (Publication - AISH ; 252). Water Resources Variability in Africa during the 20th Century : International Conference, Abidjan (CIV), 1998/11/16-19. ISBN 1-901502-65-1. ISSN 0144-7815.
Titre du document
Exploring climatic impacts on water resources in West Niger, Africa
Année de publication
1998
Type de document
Partie d'ouvrage
Auteurs
Vieux R.E., Looper J.P., Cappelaere Bernard, Peugeot Christophe, Maia A.
In
Servat Eric (ed.), Hughes D. (ed.), Fritsch Jean-Marie (ed.), Hulme Mike (ed.), Water resources variability in Africa during the 20th century = Variabilité des ressources en eau en Afrique au 20ème siècle
Source
Wallingford : AISH, 1998,
p. 347-354 (Publication - AISH ; 252). ISBN 1-901502-65-1 ISSN 0144-7815
Colloque
Water Resources Variability in Africa during the 20th Century : International Conference, Abidjan (CIV), 1998/11/16-19
Drought persisting in the Sahel for more than 25 years, impacting both surface and subsurface water resources, raises the question whether the hydrological impacts are proportional, dampened, or amplified in response to the climatic change manifested by the drought experienced since 1970. A physically-based distributed model, r.water.fea, applied to a 2.48 km2 endoreic drainage basin, typical of the Niamey area of West Niger, is used to evaluate the sensitivity of the hydrological system to such climatic extremes under four reduced-rainfall scenarios. Scenarios are built by elimination of various subsets of recorded storm events from the four monitored seasons 1992-1995. The hydrological response varies from no decrease to nearly a 30% decrease depending on the storm selection criteria. These results emphasize the variability of the hydrological response to regional climatic changes and the importance of a detailed characterization of the hydrological process transforming rainfall into runoff at the basin-event scale. (Résumé d'auteur)
Plan de classement
Analyse, évolution des climats [021CLIMAT01]
;
Fonctionnements des systèmes d'eau et modélisation [062EVAEAU02]
Descripteurs
CLIMATOLOGIE ; SECHERESSE ; RESSOURCES EN EAU ; PLUVIOMETRIE ; BILAN HYDROLOGIQUE ; MODELISATION ; PLUIE ; DEBIT ; RELATION ; 1992 1995
Description Géographique
NIGER
Localisation
Fonds IRD [F A010017925] ;
Montpellier (Centre IRD)
;
Montpellier (Maison des Sciences de l'Eau)
;
Niamey (LASDEL)
Identifiant IRD
fdi:010017942
