JWARP  Vol.12 No.12 , December 2020
Stratigraphic Data and Groundwater Resources in the Coastal Sedimentary Basin of the Pointe-Noire Region (Republic of Congo)
Abstract: The synthesis of geological and petroleum research undertaken in the coastal Sedimentary Basin of the Pointe-Noire region enabled the establishment of a lithostratigraphic scale. It has been observed that the order in which the series observed in outcrop and those encountered by deep wells succeed each other has allowed a value to be given to this relative scale. The study area corresponds to a longitudinal tectonic accident, fault or flexure. It belongs to the Cretaceous and Tertiary coastal sedimentary basin covered by the Plio-Pleistocene age formations (series of circuses), formed of highly permeable sands comprising multiple resistant horizons that store large bodies of water whose reserves are considered very important. Hydrographic network is composed of four main basins with a mediocre size. The quality of this groundwater is considered to be satisfactory for household consumption, but the sustainable management of these reserves requires constant checks on their quality as well as on the level of the reserves. All these resources put the agglomeration of Pointe-Noire close to large exploitable water reserves that meet the need for drinking water, even if, on the whole, the agglomeration is still experiencing many difficulties in terms of its drinking water supply.
Cite this paper: N’Kaya, G. , Ebale, L. , Tathy, C. , Nzila, J. , Mouthou, J. and Mabiala, B. (2020) Stratigraphic Data and Groundwater Resources in the Coastal Sedimentary Basin of the Pointe-Noire Region (Republic of Congo). Journal of Water Resource and Protection, 12, 1019-1033. doi: 10.4236/jwarp.2020.1212061.

[1]   Moukolo, N. (1992) Current State of Knowledge on Hydrogeology in Congo Brazzaville. Hydrogéologie, 1-2, 47-58.

[2]   Tathy, C., Matini, L., Moukandi Nkaya, G.D. and Mabiala, B. (2012) Assessing Factors Controlling the Hydrochemistry and Suitability for Irrigation Purposes of Aquifer AQ-2 in Pointe-Noire, South-West Congo-Brazzaville. Research Journal of Applied Sciences, Engineering and Technology, 3, 617-624.

[3]   Moukandi Nkaya, G.D., Niere, R.R., Mabiala, B., Tathy, C., Nkounkou Tomodiatounga, D. and Nganga, D. (2014) Hydrogeological Information System Elaboration of Coastal Aquifer AQ-2 of Pointe-Noire, in the South-West of Congo-Brazzaville. British Journal of Applied Science & Technology, 4, 3342-3359.

[4]   Moukandi N’kaya, G.D. (2012) Hydrogeological Study, in Situ Hydrochemical and Hydrodynamic Modeling of Coastal Sedimentary Basin Area of Pointe-Noire Aquifer System. Doctoral Thesis, Marien Ngouabi University, Brazzaville, 130 p.

[5]   Nkounkou Tomodiantounga, D., Mabiala, B. and Moukandi Nkaya, G. (2016) Hydrochemical Characteristics of the Groundwater AQ1 of the Région from Pointe-Noire to Congo Brazzaville. Journal of Geoscience and Environment Protection, 4, 95-109.

[6]   Iwaco, B.V. (1981) Recherches hydrogéologiques et techniques pour la SNDE. 17 p, Figures + annexes.

[7]   Safege (1991) Ville de Pointe Noire—Alimentation en eau—Réhabilitation des forages—Etude de nappe. Rapport de synthèse AO/FD/T206—SNDE.

[8]   SNDE (2005) Rapport de synthèse des travaux de réhabilitation et de renforcement en eau douces de la ville de Pointe-Noire. Direction départementale du Kouilou, Pointe-Noire, 7 p.

[9]   Magalloys Congo (2005) Quatre rapports relatif au projet des potasses du Kioulou sur l’Etude des impacts sociaux et environnementaux du projet de potasse du Kouilou (Climat, Géologie et sismicité, Hydrogéologie, Hydrologie et transport sédimentaire) Rapport technique.

[10]   Leroux, M. (1975) Climatologie dynamique de l’Afrique. Travaux et Documents de Géographie Tropicale, No. 19 CEGET, CNRS, 88-112.

[11]   Samba-Kimbata, M.J. (1978) Le climat du Bas Congo. Thèse 3e cycle, Univ. Bourgogne, Dijon, 280 p. + figures.

[12]   Bigot, S. (1997) Precipitation and Deep Convection in Central Africa: Seasonal cycle, Interannual Variability and Impact on Vegetation. Doctorial Thesis, University of Bourgogne, CRC, 282 p.

[13]   Tathy, C., Matini, L., Mabiala, B., Antoine, F. and Moukandi Nkaya, G.D. (2010) Hydrochemistry of Groundwater in the Aquifer AQ-2 in Pointe-Noire, South-West Congo-Brazzaville. Research Journal of Applied Sciences, 5, 361-369.

[14]   Massengo, A. (1970) Contribution to the Stratigraphic, Sedimentological and Mineralogical Study of the Plio-Pleistocene Series of the Congo-Brazzaville Coastal Basin. Thèse. 3e cycle, Université de Bordeaux, 159 p.

[15]   Ministère des Mines et de l’Energie (1993) Explanatory Note of the Geological Map of the Republic of Congo at 1:100000000.

[16]   APPA (1988) Geological and Petroleum Overview of the Congo Basins. Report 60 p.

[17]   MDPA Ingénierie (1989) Potash Exploration in the People’s Republic of Congo. Report of Phase 1, Volume 1: Geological Synthesis for Société des potasses du Congo. 29 p.

[18]   SNC-Lavalin (2007) Groundwater Ressources Investigation for Water Supply. Final Report. Kouilou Potash Project, Republic of Congo. Rapport préparé pour MagMinerals, 37p + annexes.

[19]   Schlund, J.M. and Vandenbroucke, P. (1960) Sondage K3, rapport géologique de fin de sondage. Syndicat de recherche de potasse au Congo. 14p + annexe.

[20]   Cosson, J. (1955) Geological Map of the AEF Acknowledgement. Sheet No. SB-32. NE.E. 1 Pointe-Noire to 1/500 000. AEF Mining and Geology Directorate. Explanatory Note; bull de la Direction des mines et de la géologie. No. 7, 7-12.

[21]   Dadet, P. (1969) Explanatory Leaflet for the Geological Map of the Republic of Congo Brazzaville at 1:500,000 (Area between Parallels 2 and 5 South). Mém. Du BRGM, No. 70.

[22]   Haas, J.O. (1937) Oil Research in French Equatorial Africa. C.R. IIe Congrès Mondial pétrole, Fr., 1, Section I, 183-189.

[23]   Hourcq, V. (1943) The Sedimentary Soils of the Coastal Region of French Equatorial Africa. Bulletin de Service des Minses, 2, 26-40.

[24]   Moukolo, N. (1984) Ressources en eau souterraine et approvisionnement. Essai d’Analyse socio-économique en Région équatoriale Humide (Région de Brazzaville et Pointe Noire, Congo). Thèse de Doctorat de 3ème cycle en Géologie Appliquée, Université des Sciences et Techniques du Languedoc. Académie de Montpellier, France 92p. + Annexes.

[25]   Lemaire, B. (1965) Compte rendu de réunion service géologique M.D.P.A—BRGM, Mulhouse 3p. A carte.

[26]   Peyrot, B. (1983) Interpretation: Geomorphology of the Coastline and Atlantic Seaboard of the People’s Republic of Congo. In: Travaux et documents de géographie Tropicale, CECET No. 49, 75-98.

[27]   Giresse, P. and Kouyoumontzakis, G. (1990) Quaternary Witnesses from the Congo Coast and Southern Gabon. In: Paysage quaternaires de l’Afrique centrale atlantique, Ed. ORSTOM, 106-109.