TITLE:
Eco-Toxicological Approach as a Contribution to Integrated Water Management on Okpara Dam at Kpassa in Benin: Evaluation of Contamination of Fish and Surface Water by Organochlorine Pesticides
AUTHORS:
Rafatou Fofana, Constant Labintan, Daouda Mama, Christophe Kaki, Abel Afouda, Come Linsoussi
KEYWORDS:
Water Pollution, Organochlorines, Kpassa Dam, Nanon Basin, Integrated Water Resources Management
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.6 No.14,
October
17,
2014
ABSTRACT: The paper explores the degree of pollution of organochlorine pesticides
in fish and water in the dam at Kpassa on a tributary of Okpara River that is
pumped by Benin National Water agency (SONEB) in supplying drinking water to
supply the city of Parakou. Doing so,
fourteen parameters of organochlorine are analyzed. Most of obtain
organoclorine concentration in water and fish below is indicated critical
values. However, DDT and endrine concentration in water is slightly above legal
tolerable values. Hexachlorobenen and dieldrine concentrations are three times
higher than legal limit value while aldrine is ten times higher. However,
heptachlore is double concentrated in fishery while aldrine (endrine,
dieldrine aldrine, lindane, hexachloro-benzene, DDT) is found in the dam fish and surface water three times concentrated than tolerated
value. These levels of concentrations result from the intensification of
organoclorine pesticide used in
agriculture especially in cotton production. These are caused by the chemical
application accumulated in soil and through the food value chain system.
Therefore, it is very important to extract sediment from the reservoir by
dredging in oder to renew the ecosystem of the dam. To persistently manage the
basin water resources, it is imperatively important to observe a significant
behaviour changed from all stakeholders.