Electrical soundings: help tools for mapping continuous aquifer. Case of the municipality of Cocody (South-East of Côte d’Ivoire)

Résumé

The electrical sounding is a geophysical technique used in this study to identify the geological and hydrogeological structures of the area. The objective is to map the catchment area of groundwater from resistivity data. For this, geoelectric maps are made at different depths of the basement, from resistivity values obtained after inversion of the sounding curves. Geoelectric cuts are compared to drillings data existing in the area. They do not always correspond. The differences appear in the number of stratum and the thickness of each geological formation traversed. However, basement geoelectric mapping shows that electrical sounding allows to identify the permeable zones, that are preferential for the catchment of groundwater.