Hydrogeological Characterization of Continental Terminal and Oligo-Miocene Aquifers in the Tambacounda-Kaffrine Zone (Senegal)

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Résumé

This study aims to make a hydrogeological characterization of the aquifers of the Continental Terminal and the Oligo-Miocene.To do so, an analysis is conducted on the basis of hydrogeological parameters from 172 boreholes, 10 of which are used for groundwater levels and flows analysis.The results of the statistical analysis of the hydrogeological parameters show that the average flow rate is 42.29 m 3 /h, the average specific flow rate is 5.96 m 3 /h/m, and the average transmissivity is 0.024 m² /s.These values highlight the high productivity of aquifers from the Continental Terminal and the Oligo-Miocene.The results of piezometry showed that water flows from the south center to the northwest of Tambacounda where the largest depression is located and could even be the outlet of the system.The groundwater fluctuations between low water level and high water level seasons reveal a rise in the piezometric surface of the aquifers at the scale of the study area.

Mots-clés

Aquifer, productivity, piezometry, Continental Terminal, Oligo-Miocene