Processus et bilan des flux hydriques d_un bassin versant de milieu tropical de socle au Bénin (Donga, haut Ouémé) = Hydrological processes and water balance of a tropical crystalline bedrock catchment in Benin (Donga, upper Ouémé River) /Kamagaté, Bamory /Séguis, Luc /Favreau, Guillaume Seidel, J. L. /Descloitres, Marc Affaton, P. Benin groundwater hydrochemistry hydrodynamics tropical river Hydrological processes and water balance of a tropical crystalline bedrock catchment in Benin (Donga, upper Oueme River). Hydrodynamic, geochemical, and subsurface geophysical investigations, for two consecutive years with contrasting rainfall 2 conditions, were used to characterize the hydrological processes occurring, and the water balance of a 586-km(2) watershed in Benin (Africa). The water table's monitoring shows that recharge occurs by direct infiltration of rainfall, and represents between 5 to 24% of the annual rainfall. Both surface water outflow, limited to the rainy season, and water chemistry indicate a weak groundwater contribution to river discharge. This implies that the calculated variations in annual runoff coefficients (of 14 and 28%) are mainly governed by surface and subsurface flows. To cite this article: B. Kamagati et al., C. R. Geoscience 339 (2007). 2007 text https://www.documentation.ird.fr/hor/fdi:010040729 fdi:010040729 Kamagaté Bamory, Séguis Luc, Favreau Guillaume, Seidel J. L., Descloitres Marc, Affaton P.. Processus et bilan des flux hydriques d_un bassin versant de milieu tropical de socle au Bénin (Donga, haut Ouémé) = Hydrological processes and water balance of a tropical crystalline bedrock catchment in Benin (Donga, upper Ouémé River). 2007, 339 (6), 418-429 FR