TITLE:
Mapping Saline Intrusion by Using Electrical Conductivity of the Continental Terminal Water (Northern Limit of the Ebrié Lagoon)
AUTHORS:
Adama Coulibaly, Rock Armand Michel Bouadou, Kouamé Auguste Kouassi
KEYWORDS:
Sedimentary Basin, Continental Terminal, Electrical Conductivity, Spatial Distribution, Saltwater Intrusion, Fresh Water
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.15 No.10,
October
28,
2025
ABSTRACT: Continental Terminal waters of the Ivorian sedimentary basin are being exploited to supply the population with drinking water. In 2013, the catchment fields extracted around 400.000 m3/d from the water table, although this production was insufficient to cover the needs. However, one of the consequences of this overexploitation of water is saline intrusion into the aquifer. In order to assess the level of contamination of the “Abidjan water table”, a water mineralization study in piezometers located on the northern edge of the Ebrié lagoon was carried out. This study took place in March 2022, during the major dry season and involved twenty boreholes. A piezometric probe was used for this purpose. The study focused on the horizontal spatialization of surface and on the vertical distribution of electrical conductivities. Analysis of the spatial distribution of water indicates that the CT water is generally “fresh water”, except those of the piezometer PZ_C2D 9. There, brackish and salty water is recorded. However, brackish water is abundant deeper in the basement at seven piezometers. These piezometers are located respectively along the Ebrié lagoon and around the Aghien lagoon. This study reveals that the Continental Terminal waters on the northern limit of the Ebrié lagoon are not yet affected by marine intrusion.