Abstract
The operating capacity of the Abidjan’s groundwater became insufficient. The deficit in drinking water resources in the District of Abidjan remains the major concern of the decision maker. The Aghien lagoon stands as one of the most interesting alternatives. However, studies show the levels of pollutions of this resource without lighting out on the causes and sources of these pollutions. The present study extends over the entire catchment of the Aghien lagoon which reveals the presence of urban areas and agricultural activity areas. This raises real concerns for the Ivorian authorities. This study suggests making cartography of the risk levels of pollution on the Aghien lagoon by the surface runoff on the watershed to enlighten the decision-makers on the possible measures to be taken for the protection of this resource. It emerges from it that the risk of contamination of the lagoon is very likely. Agricultural and domestic best practices inside the pouring pond are compulsory to fight against the pollutions of this resource.
Highlights
Abidjan is currently fed out of drinking water exclusively starting from the quaternary groundwater
To understand the landscape and to deduce the sources of pollution, we realized the map of land use of the watershed (Figure 3)
Banana plantations upstream to the study area, the plantations of oil palm trees and rubber plantation in the North of the Aghien lagoon are identified as sources of pollution
Summary
Abidjan is currently fed out of drinking water exclusively starting from the quaternary groundwater. This resource is increasingly insufficient because of the demographic pressure. It is under the threat of contamination by sources of organics and chemical pollution [1]-[6]. The recourse to other sources of water to sa-. How to cite this paper: Koffi, K.J.-P., N’Go, Y.A., Kone, D., Kouassi, K.H. and Issiaka, S. (2015) Mapping of Pollution Risk of Surface Waters by Runoff from Watershed: Case of Aghien Lagoon (South of Côte d’Ivoire). Journal of Water Resource and Protection, 7, 1457-1466.
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