International Science Community Association Research Journal of Chemical Sciences 2231-606X 10 1 2020 02 18 Anomalistics of physical and chemical parameters variability under anthropogenic and natural conditions in the four sectors of Aby lagoon (Ebrié lagoon system, CÔte d′Ivoire) 34 40 EN Beckley Ikhajiagbe 1 Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Boniface O. Edegbai 2 Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Melody A. Eweka 3 Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Dinesh R. Pandithavidana 1 Department of Chemistry, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri Lanka Rangika K.W. Munaweera 2 Department of Chemistry, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri Lanka Ahola David Oklo 1 Chemistry Department, Benue State University, PMB 102119, Makurdi, Nigeria Maxwell Idoko Ocheri 2 Geography Department, Benue State University, PMB 102119, Makurdi, Nigeria Alimi John Praise 3 Nigerian Stored Products Research Institute, PMB 5044, Dugbe, Ibadan, Nigeria Patricia Ani Aleke 4 Chemistry Department, Benue State University, PMB 102119, Makurdi, Nigeria KONAN Kouadio F. Arthur 1 Department of Mathematics-Physics-Chemistry-Computer Science, Physics Chemistry Laboratory, Jean Lorougnon Guédé University of Daloa, 12 BP V 25 Daloa 12, CÔte d\'Ivoire YAO Marcel Konan 2 Physical Chemistry Laboratory, UFR SSMT, Félix Houphouët-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, CÔte d′Ivoire DONGUI Bini Kouamé 3 Department of Mathematics-Physics-Chemistry-Computer Science, Physics Chemistry Laboratory, Jean Lorougnon Guédé University of Daloa, 12 BP V 25 Daloa 12, CÔte d\'Ivoire TROKOUREY Albert 4 Physical Chemistry Laboratory, UFR SSMT, Félix Houphouët-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, CÔte d′Ivoire Akpétou Kouamé 1 Laboratoire des Sciences et Technologies de l′Environnement, Université Jean Lorougnon Guédé Daloa, CÔte d′Ivoire Yapi Yapo Hermann1 2 Laboratoire des Sciences et Technologies de l′Environnement, Université Jean Lorougnon Guédé Daloa, CÔte d′Ivoire Wango Ted-Edgar 3 Laboratoire de Géologie marine et de Sédimentologie, Université Félix Houphouet Boigny, Abidjan, CÔte d′Ivoire Assémian Sylvie 4 Laboratoire de Chimie et Environnement, Centre de Recherches Océanologiques, Abidjan, CÔte d′Ivoire Koua Jérémie Alex 5 Laboratoire des Sciences et Technologies de l′Environnement, Université Jean Lorougnon Guédé Daloa, CÔte d′Ivoire Kouassi Aka Marcel 6 Laboratoire de Chimie et Environnement, Centre de Recherches Océanologiques, Abidjan, CÔte d′Ivoire > Research Paper 2019 9 30 2020 02 18 This research aimed to determine anomalies in the physical and chemical parameters variability of the sub-lagoon Aby (Ebrié Lagoon, Ivory Coast). Data, generated from 2007-2009 at 18 study stations, were statistically partitioned using HAC, consolidated with the use of the k-means algorithm. That generated classification of the stations in two (02) groups. Group 1 is abnormally nitrogenous and has seasonal stratifications. This group consists of clusters 1 and 2 (stations 13, 10, 9 and 8; then 1, 12, 17 and 18 respectively) located in South-Aby and Ehy. Group 2 is more abnormal in nutrient than metal impacted. It is significantly influenced by nitrogen salts, phosphorus and mobilizable cadmium. This group is composed of clusters 3-7 which are mainly located in the lagoon entities Aby Nord and Tendo. In fact, beside the resuspension of the bituminous lagoon bottoms, the South-Aby and Ehy entities would have physical and chemical characteristics favourable to the human use of the Aby lagoon waters. Copyright@ International Science Community Association