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Environmental geophysical study of the groundwater mineralization in a plot of the Cotonou Littoral Zone (South Benin)

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doi: 10.1155/2012/329827
Authors:Yalo, Nicaise; Descloitres, Marc; Alassane, Abdoukarim; Mama, Daouda; Boukari, Moussa
Author Affiliations:Primary:
University of Abomey-Calavi, Laboratory of Applied Hydrology, Cotonou, Benin
Other:
Institut de Recherche pour le Dévelppement, France
Volume Title:International Journal of Geophysics
Source:International Journal of Geophysics, Vol.2012. Publisher: Hindawi, London, International. ISSN: 1687-885X
Publication Date:2012
Note:In English. 40 refs.; illus., incl. sect., sketch maps
Summary:Geophysical investigations comprising electrical resistivity and electromagnetic conductivities methods were deployed in a 350 m2 sector, strewn with 11 wells. Within the framework of an environmental study on a small scale in the south of Benin, the water conductivity of these wells was measured to determine in a direct way mineralization of the coastal water table in the littoral zone. This environmental study aimed to prospect by the geophysical methods the space extension of the water table mineralization obtained by direct measurements of water conductivity in the well and the depth of the fresh water/salted water interface in the coastal aquifer. Electromagnetic measurements of conductivities made it possible to chart a gradient of mineralization in the northwest direction. The logs of vertical electric soundings showed a deepening of the fresh water/salted water interface in the southern part and its rupture in the northern part. The electrical resistivities of the interface are sensitive to the degree of its mineralization. It has been observed that the geophysical methods in electrical and electromagnetic prospection are a great contribution to the environmental study of the water table mineralization in the littoral zone for a sustainable management of the water resource.
Subjects:Aquifers; Coastal environment; Conductivity; Electrical conductivity; Electromagnetic methods; Geophysical methods; Ground water; Mineralization; Resistivity; Water resources; Water table; Africa; Benin; West Africa; Cotonou Benin; Cotonou Littoral Zone; Littoral zone; Southern Benin
Coordinates:N062048 N062206 E0022102 E0021853
Record ID:812953-54
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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