Résumé Ce travail est une synthèse des connaissances actuelles du bilan des transports en solution et en suspension sur un grand bassin forestier equatorial. Une large place est faite aux mesures effectuées dans le cadre de l'opération grands bassins fluviaux du programme PIRAT. Les résultats obtenus sur le fleuve Congo à Brazzaville (95 % de la superficie totale du bassin soit 3.5 X 10 6 km ) chiffrent les exportations moyennes de la façon suivante: matières dissoutes: 61.1 X 10 6 t an" 1 ; et matières en suspension: 30.6 X 10 6 t an" 1 . La caractérisation hydrochimique de la matière dissoute révèle une faible minéralisation des eaux du fleuve.
Transport in solution and in suspension by the main Congo River and its principal right bank tributariesAbstract This paper presents a summary of actual knowledge of the solute and suspended transport in the Congo river. Measurements on large basins under the PIRAT programme are significant. The results on the Congo river at Brazzaville (95 % of the total area of the basin being 3.5 X 10 6 km 2 ) give the following mean sediment yield: dissolved materials: 61.1 X 10 6 t year" 1 ; and materials in suspension: 30.6 x 10 6 t year" 1 . Hydrochemical analyses have shown little mineralization of the river water.
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