Pollution des écosystèmes aquatiques par les produits phytosanitaires : rapport technique de projet de recherche
Files
Date
2005
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Université d'Abomey-Calavi, Cotonou, BJ
Abstract
Le fleuve Ouémé est l’un des plus importants cours d’eau naturel où s’exercent d’importantes activités économiques telles que la pêche, la pisciculture. Il a une longueur de 510 km et couvre une surface 50.000 km2). Il prend sa source au nord du pays (environ de 9°51 NS) dans les massifs de l’Atacora. Il se jette dans l’Océan Atlantique en passant par le lac Nokoué et le chenal de Cotonou. Ses deux principaux affluents sont le Zou (150 km) et l’Okpara (200 km). Il traverse plusieurs zones agricoles situées de part et d’autre du fleuve. La capacité productive des superficies emblavées pour la culture de coton et des produits vivriers est renforcée par une utilisation importante d’engrais chimiques et de pesticides. Les eaux du fleuve Ouémé servent d’irrigation, de transport pour les riverains, et de transport de marchandises entre le Nigéria et le Bénin, il est utilisé comme eau de boisson. Sa biodiversité est remarquablement élevée avec d’importantes variétés de poisson, de mollusques, d’insectes, d’amphibiens, de reptiles et d’oiseaux (Lalèyè 2004). Approximativement 90% des espèces de poissons pêchées dans le fleuve sont destinées à la consommation.
The Ouémé river is Benin’s longest fluvial basin (length: 510 km; surface: 50 000 km²). It springs out of the Tanéka hills (about 9°51 NS) in the East of the Atacora mountains and flows into the Atlantic ocean by the Cotonou channel (Fig. 1). Its two important tributaries are the Zou river (150 km) and the Okpara river (200 km). It is one of the most important natural water resources allowing fishing, aquaculture and agriculture. Agricultural lands cover a large part of the river basin with intensive agricultural practice including a high use of chemicals like fertilizers and pesticides for cotton farming and vegetables. The Ouémé river provides drinking water, water for domestic use and water for irrigation. It is also an important means of transportation for the people of the area. It is used for commercial transport and business between the neighbouring country Nigéria and the Republic of Bénin. Its biodiversity is remarkably high, with a large variety of fish species, molluscs, shellfishs, insects, amphibians, reptiles and birds (Lalèyè et al. 2004). Approximately 90% of the fish species from the Ouémé river are used for human consumption.
The Ouémé river is Benin’s longest fluvial basin (length: 510 km; surface: 50 000 km²). It springs out of the Tanéka hills (about 9°51 NS) in the East of the Atacora mountains and flows into the Atlantic ocean by the Cotonou channel (Fig. 1). Its two important tributaries are the Zou river (150 km) and the Okpara river (200 km). It is one of the most important natural water resources allowing fishing, aquaculture and agriculture. Agricultural lands cover a large part of the river basin with intensive agricultural practice including a high use of chemicals like fertilizers and pesticides for cotton farming and vegetables. The Ouémé river provides drinking water, water for domestic use and water for irrigation. It is also an important means of transportation for the people of the area. It is used for commercial transport and business between the neighbouring country Nigéria and the Republic of Bénin. Its biodiversity is remarkably high, with a large variety of fish species, molluscs, shellfishs, insects, amphibians, reptiles and birds (Lalèyè et al. 2004). Approximately 90% of the fish species from the Ouémé river are used for human consumption.
Description
item.page.type
IDRC Final Report
item.page.format
Keywords
ENGRAIS CHIMIQUES, RESSOURCES NATURELLES, RESSOURCES EN EAU, AQUACULTURE, TERRE AGRICOLE, PESTICIDES, COURS D'EAU, POLLUTION DE L'EAU, COTON, ECOSYSTEMES, BENIN--LE FLEUVE OUEME