TITLE:
Assessment of the Physico-Chemical Pollution of a Water Body in a Perspective of Integrated Water Resource Management: Case Study of Nokoué Lake
AUTHORS:
Josué Zandagba, Firmin M. Adandedji, Daouda Mama, Amédée Chabi, Abel Afouda
KEYWORDS:
Water, Eutrophication, Nutrients, Nokoué Lake, Pollution
JOURNAL NAME:
Journal of Environmental Protection,
Vol.7 No.5,
April
18,
2016
ABSTRACT:
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.