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Hydrology 2018, 5(3), 32; https://doi.org/10.3390/hydrology5030032

Spatio-Temporal Analysis and Water Quality Indices (WQI): Case of the Ébrié Lagoon, Abidjan, Côte d’Ivoire

1
Laboratoire de Géosciences et Environnement, UFR des Sciences et gestion de l’Environnement, Université NANGUI ABROGOUA, Abidjan, Cote d’Ivoire
2
Laboratoire de Physique de l’Atmosphère et de Mécanique de Fluides, UFR Sciences des Structures, de la Matière et de Technologie, Université Félix Houphouët Boigny de Cocody, Abidjan, Cote d’Ivoire
3
Ministère de la Salubrité, de l’Environnement et du Développement Durable, Abidjan, Cote d’Ivoire
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Laboratoire de Sciences de l’Environnement, UFR des Sciences et gestion de l’Environnement, Université NANGUI ABROGOUA, Abidjan, Cote d’Ivoire
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Programme Manager Africa Regional Centre|Stockholm International Water Institute (SIWI), Pretoria 0181, South Africa
*
Author to whom correspondence should be addressed.
Received: 31 December 2017 / Revised: 22 June 2018 / Accepted: 23 June 2018 / Published: 28 June 2018
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Abstract

For decades, the Ébrié Lagoon in Côte d’Ivoire has been the receptacle of wastewater effluent and household waste transported by runoff water. This work assesses the spatio-temporal variability of the Ébrié lagoon water quality at the city of Abidjan. The methodological approach used in this study is summarized in three stages: the choice and standardization of the parameters for assessing water quality for uses such as aquaculture, irrigation, livestock watering, and sports and recreation; the weighting of these parameters using the Hierarchical Analysis Process (AHP) of Saaty; and finally, the aggregation of the weighted parameters or factors. Physicochemical and microbiological analysis data on the waters of the Ébrié lagoon for June and December of 2014 and 2015 were provided by the Ivorian Center for Anti-Pollution (Centre Ivoirien Anti-Pollution, CIAPOL), and the concentrations of trace elements in sediments (As, Cd, Cr, Pb, Zn) were used. The aggregation of standardized and weighted parameters allowed the calculation of the Water Quality Indices (WQI) by usage for each bays of the lagoon. The results show that in both 2014 and 2015, the waters of the Ébrié lagoon were generally of poor quality for the different uses examined in this study (aquaculture, irrigation, livestock watering, and sport and recreation) with an accentuation in 2015. However, some bays of the lagoon have waters of dubious to satisfactory quality. This study contributes an improved evaluation of the Ébrié lagoon waters. View Full-Text
Keywords: Water Quality Indices; spatio-temporal analysis; Ébrié lagoon; surface water; Abidjan Water Quality Indices; spatio-temporal analysis; Ébrié lagoon; surface water; Abidjan
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Naga, C.; Talnan Jean Honoré, C.; Delfin, O.A.; Bernard, Y.O.; Guillaume, Z.S.; Henoc Sosthène, A.; Mpakama, Z.; Issiaka, S. Spatio-Temporal Analysis and Water Quality Indices (WQI): Case of the Ébrié Lagoon, Abidjan, Côte d’Ivoire. Hydrology 2018, 5, 32.

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