Characterization of the aquifers of the Bangui urban area, Central African Republic, as an alternative drinking water supply resource
2013
Djebebe-Ndjiguim, Chantal-Laure | Huneau, Frédéric | Denis, A. | Foto, E. | Moloto-A-Kenguemba, G. | Celle-Jeanton, Hélène | Garel, E. | Jaunat, Jessy, J. | Mabingui, J. | Le Coustumer, Philippe | Laboratoire « Sciences pour l’Environnement » (UMR CNRS 6134 SPE) (SPE) ; Centre National de la Recherche Scientifique (CNRS)-Università di Corsica Pasquale Paoli [Université de Corse Pascal Paoli] | Faculté des Sciences, Laboratoire d'Hydrosciences Lavoisier (LHL) ; Université de Bangui | Institut de Mécanique et d'Ingénierie de Bordeaux (I2M) ; Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies | Laboratoire Magmas et Volcans (LMV) ; Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) | Géoressources et environnement ; Institut Polytechnique de Bordeaux (Bordeaux INP)-Université Bordeaux Montaigne (UBM) | ENGESID ; Université de Bordeaux (UB)
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Mostrar más [+] Menos [-]Inglés. This paper presents the results of a survey carried out in 2010 aimed at evaluating the type and quality of the groundwater resources of the Bangui region of the Central African Republic. This work is the first step towards the development of groundwater resources in the Central African Republic in order to find alternatives to direct pumping from the Ubangi River and provide the population of the suburbs with a safer drinking water supply from deep boreholes. By combining both geological and hydrogeochemical approaches, it appears that the geology of Bangui is favourable to the development of a secure and sustainable water supply from groundwater provided that the conditions of exploitation would be constrained by the local authorities. The deep Precambrian carbonate aquifers, known as the Bimbo and Fatima formations, are identified as target resources in view of the relatively good quality of their water from the chemical point of view, and the semi-confined structure of the aquifers that prevents the mixing with shallow aquifers that are already strongly affected by domestic and industrial pollution. The main difficulty in terms of exploitation is to appreciate the depth of the resource and the more or less fractured/palaeo-karstified type of the porosity.
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