Abstract

The study of the geological and hydrogeological structure of the aquifer of the city of N'Djamena aims to improve our knowledge for sustainable and prudent management of the groundwater resource. For this study, a methodology combining the geological and hydrogeological structure was adopted. It consists of two steps, the first of which is based on the realization and analysis of lithological sections of different boreholes capturing Quaternary aquifers and the second consists in the realization of the hydrogeological structure of the Quaternary aquifer. The results of the different sections of the boreholes revealed different lithological facies with varying thicknesses (both vertically and laterally). The different Quaternary sections carried out are made up of alternating layers of clay and sand. The deposits are predominantly sandy. The slick is lodged in the sandy formations, whose thickness is more or less constant, which is of the order of 50 to 63 m. The hydrogeological structure allowed us to determine the roof, the wall, the thickness of the Quaternary aquifer as well as its wetted thickness, which averages 44 m. These new data allowed us to realize the 3D architecture of the Quaternary Aquifer of the city of N'Djamena for a better efficient and sustainable management.

Keywords:

Aquifer, Chad, lithostratigraphy, N'Djamena, quaternary,

References

Competing interests

The authors have no competing interests.

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The authors have no competing interests.