Author(s)

Josué Zandagba¹, Firmin M. Adandedji², Daouda Mama², Amédée Chabi¹, Abel Afouda³

¹International Chair in Mathematical Physics and Applications (ICMPA), Cotonou, Benin.
²Laboratoire d’Hydrologie Appliquée (LHA), Institut National de l’Eau, Abomey-calavi, Benin.
³West African Science Service Center on Climate Change and Adapted Land Use, Institut National de l’Eau, Abomey-calavi, Benin.

Nokoué Lake is the most important surface of brackish waters of Benin and one of the biggest West African lagoons, in point of view of its surface (about 150 km²), its productivity and exploitation. The aim of this study is to monitor the temporal and spatial variation of physico-chemical parameters of Nokoué lake water for its sustainable management. A total of twenty (20) points of sampling have been followed during a period of one year. The results of the monitoring reveal low dissolved oxygen and high concentration in phosphorus and chlorophyll a, sign of eutrophication. In addition, nutrient concentrations (nitrites, phosphates, nitrates) responsible for the phenomenon compared to water quality assessment grid of the Organisation for Economic Co-operation and Development, (OECD) used to classify the waters in the range of hyper-eutrophic waters characterized by the proliferation of aquatic plants. So some measures have been proposed to remediate to this pollution in order to an integrated management.

Water, Eutrophication, Nutrients, Nokoué Lake, Pollution

Zandagba, J. , Adandedji, F. , Mama, D. , Chabi, A. and Afouda, A. (2016) Assessment of the Physico-Chemical Pollution of a Water Body in a Perspective of Integrated Water Resource Management: Case Study of Nokoué Lake. Journal of Environmental Protection, 7, 656-669. doi: 10.4236/jep.2016.75059.