Water balance and vegetation change in the Sahel: A case study at the watershed scale with an eco-hydrological model

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dc.contributor.author Boulain, NP
dc.contributor.author Cappelaere, B
dc.contributor.author Seguis, L
dc.contributor.author Favreau, G
dc.contributor.author Gignoux, J
dc.date.accessioned 2011-02-07T06:19:45Z
dc.date.issued 2009-01
dc.identifier.citation Journal Of Arid Environments, 2009, 73 (12), pp. 1125 - 1135
dc.identifier.issn 0140-1963
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/13210
dc.description.abstract The Sahel, a semiarid area set in a fragile context, has been undergoing dramatic climate and land-use changes since the middle of the 20th century. The effects of these changes on the water cycle are analyzed using a coupled eco-hydrological model at the scale of a small representative catchment. Three land cover situations, corresponding to the 1950, 1975, and 1992 states, are simulated with two contrasted rain seasons, to produce the respective and combined effects of these two factors on the catchment water balance. The latter is largely dominated by rain-season evapotranspiration, representing some 6065% of annual rainfall for the wet year in the three land use situations, but over 85% for the dry year. In absolute terms, evapotranspiration appears more sensitive to land-use changes than to the climate, but with variations that remain below 10%. These evapotranspiration figures are corroborated by field observations. Relative runoff sensitivity is much higher, nearly in the same 1.5:1 ratio as the annual rainfall for the climate effect, and with an increase by a factor of about 2.6 for the land-use effect. Confronting long-term runoff and water table dynamics evidences a direct linkage between these two processes.
dc.publisher Academic Press
dc.relation.isbasedon 10.1016/j.jaridenv.2009.05.008
dc.title Water balance and vegetation change in the Sahel: A case study at the watershed scale with an eco-hydrological model
dc.type Journal Article
dc.parent Journal Of Arid Environments
dc.journal.volume 12
dc.journal.volume 73
dc.journal.number 12 en_US
dc.publocation United Kingdom en_US
dc.publocation London & New York
dc.identifier.startpage 1125 en_US
dc.identifier.endpage 1135 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0502 Environmental Science and Management
dc.personcode 108965
dc.percentage 100 en_US
dc.classification.name Environmental Science and Management en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.edition Taylor & Francis
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Climate change; Evapotranspiration; Hydrological processes; Land use; Niger; Runoff en_US
dc.description.keywords Commercial Law - China
dc.description.keywords China - Commercial Policy
dc.description.keywords China - Economic Policy
dc.description.keywords Investments, Foreign - Law and legislation - China
dc.description.keywords Foreign Trade regulation - China
dc.description.keywords Law reform - China
dc.description.keywords Socialism - China
dc.description.keywords Democracy - China
dc.description.keywords Climate change
dc.description.keywords Evapotranspiration
dc.description.keywords Hydrological processes
dc.description.keywords Land use
dc.description.keywords Niger
dc.description.keywords Runoff
dc.description.keywords Climate change
dc.description.keywords Climate change
dc.description.keywords Evapotranspiration
dc.description.keywords Evapotranspiration
dc.description.keywords Hydrological processes
dc.description.keywords Hydrological processes
dc.description.keywords Land use
dc.description.keywords Land use
dc.description.keywords Niger
dc.description.keywords Niger
dc.description.keywords Runoff
dc.description.keywords Runoff
dc.description.keywords Climate change
dc.description.keywords Evapotranspiration
dc.description.keywords Hydrological processes
dc.description.keywords Land use
dc.description.keywords Niger
dc.description.keywords Runoff
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10


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