@article{fdi:010035674, title = {{H}ydrologic and land use impacts on vegetation growth and {NPP} at the watershed scale in a semi-arid environment}, author = {{B}oulain, {N}icolas and {C}appelaere, {B}ernard and {S}eguis, {L}uc and {G}ignoux, {J}. and {P}eugeot, {C}hristophe}, editor = {}, language = {{ENG}}, abstract = {{S}ignificant, adverse climatic change and drastically increased demographic pressure have strongly affected, in recent years, the hydrology and environment in the semi-arid {S}ahel region of {W}est {A}frica. {M}arked rain deficits have coincided with increased water runoff, meaning less water availability for the vegetation. {C}onversely, changes in vegetation cover have had strong repercussions on the hydrologic cycle. {T}o study these phenomena, the coupling of two explicit, process-based models, of catchment hydrology and of mixed vegetation cover, respectively, has been undertaken and applied to a 2 km(2) site in {N}iger. {S}ome of the first significant results are presented herein. {S}ome are consistent with intuitive judgements that can be made in the absence of a coupled model, others are much less so and show that representation through model coupling of hydro sphere/biosphere interactions is essential to produce more reliable analyses and projections. {I}n particular, it is found that the relation of biomass productivity to rainfall under this dry, water-limited climate is not as straightforward as one would expect, more specifically, that its main control may not be the total season rainfall.}, keywords = {millet ; savanna ; {W}est {A}frica ; climate change ; {NIGER} ; {SAHEL} ; {ZONE} {SEMIARIDE}}, booktitle = {}, journal = {{R}egional {E}nvironmental {C}hange}, volume = {6}, numero = {3}, pages = {147--156}, ISSN = {1436-3798}, year = {2006}, DOI = {10.1007/s10113-006-0014-0}, URL = {https://www.documentation.ird.fr/hor/fdi:010035674}, }