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Communication incl. Poster: BibTeX citation key:  Louvet
Louvet, S., Barbier, B., Paturel, J.-E., Ruelland, D., Diancoumba, M., Traoré, P. S., Mahé, G. & Diello, P. 2009. Evolution of land-use under anthropogenic pressure in the Bani river basin. Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: roussot 2009-11-05 10:13:13
Categories: Society-Environment-Climate interactions
Keywords: Water - Energy - Resources
Creators: Barbier, Diancoumba, Diello, Louvet, Mahé, Paturel, Ruelland, Traoré
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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This study comes within the RESSAC program which analyzes the vulnerability of regions under climatic and anthropogenic influences with hydrological models and scenarii allowing the estimate of the water resources and the vulnerability. The study was applied to the Bani river sub-basin, which is part of the larger Niger river basin.
Recent hydrological studies have shown a hydrological paradox observed since 1970 over river basins of continental West Africa (Mahé 2002, 2004). Indeed, runoff coefficients have strongly increased while the regional rainfall decreased. In some places, total river flows increased during the drought periods. It is possible that concurrent changes in vegetation cover and surface conditions may have changed runoff and soil infiltration conditions. This environmental degradation, though probably due in part to drought, is primarily a consequence of anthropogenic activities, in the form of more intense farming and excessive harvesting of forest resources (Ruelland et al., 2008).
Related modifications in the rainfall-runoff relationships need to be studied with new approaches which include both hydrological model parameters linked to climatic variability, and indicators of anthropogenic activities associated with population growth. In this way indices of anthropogenic pressure are defined. A population model is calibrated and validated for the basin area using agricultural statistics, remote sensing analysis data and demographic datasets. This model describes the environmental change and population growth. Method is presented and preliminary results are discussed and compared to the observed data.
Added by: roussot