International Science Community Association Research Journal of Chemical Sciences 2231 - 606X 7 9 2017 09 18 Contribution to the study of the seasonal variation of the physicochemical and metallic parameters of a reservoir in a tropical environment: Case of Ilauko reservoir at Savè in Benin 17 28 EN Deepa J. 1 Department of Chemistry, Auxilium College, katpadi, Vellore-6, India Jaya Shanthi R. 2 Department of Chemistry, Auxilium College, katpadi, Vellore-6, India Salifou Issa 1 Laboratoire d’Hydrologie Appliquée, Institut National de l\'Eau (INE), Université d’Abomey-Calavi, 01 BP 526, Cotonou01, Bénin and Laboratoire d’analyse des eaux de la Société d’Exploitation des Eaux du Niger (SEEN) de Zinder, Niger Daouda Mama 2 Laboratoire d’Hydrologie Appliquée, Institut National de l\'Eau (INE), Université d’Abomey-Calavi, 01 BP 526, Cotonou01, Bénin Zanguina Adamou 3 Département de Chimie, Faculté des Sciences et Techniques, Université Abdou Moumouni, B.P. 10662 Niamey, Niger Ibrahim Natatou 4 Département de Chimie, Faculté des Sciences et Techniques, Université Abdou Moumouni, B.P. 10662 Niamey, Niger Mousa Boukari 5 Laboratoire d’Hydrologie Appliquée, Institut National de l\'Eau (INE), Université d’Abomey-Calavi, 01 BP 526, Cotonou01, Bénin Dominique Sohounhloué 6 Laboratoire d’Étude et de Recherche en Chimie Appliquée (LERCA), École Polytechnique d’Abomey-Calavi (EPAC), Université d’Abomey-Calavi, Cotonou, Bénin Amedée CHABI 1 International Chair in Mathematical Physics and Applications (ICMPA), Cotonou, Benin and Laboratory of Applied Hydrology (LHA), National Institute of water, Abomey-Calavi, Benin Firmin M. Adandedji 2 International Chair in Mathematical Physics and Applications (ICMPA), Cotonou, Benin and Laboratory of Applied Hydrology (LHA), National Institute of water, Abomey-Calavi, Benin Eric A. ALAMOU 3 Laboratory of Applied Hydrology (LHA), National Institute of water, Abomey-Calavi, Benin Josué Zandagba 4 Laboratory of Applied Hydrology (LHA), National Institute of water, Abomey-Calavi, Benin Daouda Mama 5 Laboratory of Applied Hydrology (LHA), National Institute of water, Abomey-Calavi, Benin Abel AFOUDA 6 Laboratory of Applied Hydrology (LHA), National Institute of water, Abomey-Calavi, Benin and West Africa Science Service Center on Climate Change and Adapted Land Use, National Institute of water, Abomey-Calavi, Benin > Research Paper 2017 7 8 2017 09 18 This study, that is carried out on, Ilauko dam of the SUCOBE Company, (i.e., Society of Sugar of Savè (SSS)), is the most important drinking water supply for the population of Savè and its surroundings. The objective of this study is to analyze the physico-chemical and metallic quality of Ilauko reservoir water in order to manage this resource rationally in a sustainable way for the benefit of the populations. To achieve this goal, eleven (11) points were followed for one year period. The results from the physicochemical analyses reveal the low oxygen contents dissolved under the effect of the increase of the temperature and the raise of phosphorus and chlorophyll; this characterizes the phenomenon of eutrophication. The values of the nutrients such as nitrogen and phosphorus are largely higher than the limiting values indicated by the system of classification of the Organization for Economic Cooperation and Development (OECD). Water of the dam Ilauko is therefore eutrophic. Copyright@ International Science Community Association