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, Nicolas en_US
dc.contributor.author Cappelaere, B. en_US
dc.contributor.author Seguis, L. en_US
dc.contributor.author Favreau, G. en_US
dc.contributor.author Gignoux, J. en_US
dc.contributor.editor en_US
dc.date.accessioned 2011-02-07T06:19:45Z
dc.date.available 2011-02-07T06:19:45Z
dc.date.issued 2009 en_US
dc.identifier 2009003429 en_US
dc.identifier.citation Boulain Nicolas et al. 2009, 'Water balance and vegetation change in the Sahel: A case study at the watershed scale with an eco-hydrological model', Academic Press, vol. 73, no. 12, pp. 1125-1135. en_US
dc.identifier.issn 0140-1963 en_US
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 60?65% 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. en_US
dc.language en_US
dc.publisher Academic Press en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.jaridenv.2009.05.008 en_US
dc.title Water balance and vegetation change in the Sahel: A case study at the watershed scale with an eco-hydrological model en_US
dc.parent Journal Of Arid Environments en_US
dc.journal.volume 73 en_US
dc.journal.number 12 en_US
dc.publocation United Kingdom en_US
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 050200 en_US
dc.personcode 108965 en_US
dc.personcode 0000060740 en_US
dc.personcode 0000060741 en_US
dc.personcode 0000060742 en_US
dc.personcode 0000060743 en_US
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.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.staffid en_US


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