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Water management and environment - society interactions in the lower delta of the Senegal river - Mauritania. The functioning of the delta of the river Senegal was strongly modified by the construction of the Diama dam. In this artificial hydrosystem, it is sometimes difficult to reconcile the interests of the various actors. The objectives of this study are analytical (to describe the complex interactions between floods, natural resources and society and prospective (to help in the definition of flood scenario acceptable to most stakeholders). The method was applied to the basin of Bell (4000 ha) part of the Diawling National Park on the Mauritanian bank of the lower delta of the Senegal river. A monitoring system of the effects of floods in the physical and human environment was set up and a hydraulic model developed. At first, the model was obtained from flow data. These data were then integrated into a one-dimensional hydraulic model (Mike 11 by the Danish Hydraulic Institute). When associated with a digital elevation model and a geographic information system (Arc view of Esri), the model enabled us to describe the spatial dynamics of floods. These data are confronted with ecological and sociological data. Different flood scenarios are proposed, thus allowing the managers to explore ways to strike a balance between the differing water needs of the various stakeholders through an adaptive management approach

Gestion de l'eau et interactions société-nature le cas du delta du Sénégal en rive mauritanienne