Chemical Evolution of Groundwater in the Dindefello Plain Area in South-Eastern Senegal

DOI: 10.4236/jwarp.2014.619160   PDF   HTML   XML   3,199 Downloads   3,745 Views   Citations


This study was to clarify the main mechanisms of shallow groundwater mineralization in the Dindefello Plain Area. Water composition data obtained in this study were subjected to aqueous speciation calculations together with data plotting on key diagrams so as to create work assumptions. Hypothesized reaction models of the processes of chemical weathering of carbonates and silicate minerals under the carbon dioxide regime were proposed and tested by selecting two water sample analyses interpreted as “starting” and “ending” water composition along a hydrologic flow line, and then running the PHREEQC (version 2) batch modeling procedure, to simulate chemical balances and compositional variations of groundwater within the geochemical system. For the flow path data discussed here, there was close agreement between the model results and the observed hydrochemistry, and so the proposed geochemical evolution model was deemed reliable.

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Diop, S. and Tijani, M. (2014) Chemical Evolution of Groundwater in the Dindefello Plain Area in South-Eastern Senegal. Journal of Water Resource and Protection, 6, 1793-1815. doi: 10.4236/jwarp.2014.619160.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Garrels, R.M. and Mac Kenzie, F.T. (1967) Origin of the Chemical Compositions of Some Springs and Lakes. In: Gould, R.F., Ed., Equilibrium Concepts in Natural Water Systems: Advances in Chemistry Series, American Chemical Society, Washington DC, 222-242.
[2] Drever, J.I. (1988) The Geochemistry of Natural Waters. 2nd Edition, Prentice-Hall, Englewood Cliffs, 437 p.
[3] Bricker, O.P., Godfrey, A. and Cleaves, E. (1968) Mineral-Water Interaction during the Chemical Weathering of Silicates. In: Baker, R.A., Ed., Trace Inorganics in Water: Advances in Chemistry Series, American Chemical Society, Washington DC, 128-142.
[4] Freeze, R.A. and Cherry, J.A. (1979) Groundwater. Prentice-Hall, Inc., Englewood Cliffs.
[5] Polzer, W.L. and Hem, J.D. (1965) The Dissolution of Kaolinite. Journal of Geophysical Research, 70, 6233-6240.
[6] Hem, J. (1977) Surface Chemical Processes in Groundwater Systems. Proceedings of the Second International Symposium on Water-Rock Interaction, Strasbourg, 17-25 August 1977, IV 76-IV 85.
[7] Tardy, Y. (1971) Characterization of the Principal Weathering Types by the Geochemistry of Waters from Some European and African Crystalline Massifs. Chemical Geology, 7, 253-271.
[8] White, D.E., Hemd, J.D. and Waring, G.A. (1963) Chemical Composition of Subsurface Waters. In: Data of Geochemistry, 6th Edition, US Geological Survey Professional Paper 440-F, 67 p.
[9] Diop, S., Diome, F., Samb, M. and Sarr, R. (2014) Hydrogeochemical Relationships between Spring and Subsurface Waters in the Dindefello Area of South Eastern Senegal. Journal of Water Resource and Protection, 6.
[10] Parkhurst, D.L. and Apello, C.A.J. (1999) User’s Guide to PHREEQC (Version 2)—A Computer Program for Speciation, Batch Reaction, One Dimensional Transport and Inverse Geochemical Calculations. US Department of the Interior, USGS, Water Resource Investigations—Report No. 99-4259, Denver Colorado.
[11] Le Page, A. (1986) The Main Geological Units of the Mauritanides Belt at the Senegal-Mauritanian Borders—Structural Changes in the Chain from Upper Precambrian to Devonian. Thèse de Doctorat d’Etat, Universite Aix-Marseille, Marseille, 518 p.
[12] Le Page, A. (1988) Rock Deformation Associated with the Displacement of Allochthonous Units in the Central Segment of the Caledono-Hercynian Mauritanides Belt (Islamic Republic of Mauretania and Eastern Senegal). Journal of African Earth Sciences, 7, 265-283.
[13] Lecorche, J.-P. and Sougy, J. (1978) The Mauritanides, West Africa, a Synthesis Assay. PIGC-UNESCO Project No. 27, Caledonide Orogen, Geological Survey of Canada, Ottawa.
[14] Mischard, A. and Sougy, J. (1978) The Hercynian Orogen in the Northwestern Edge of Africa (Structures of the Primary Chains from Morocco to Senegal). Proceedings of the Colloque Intern. CNRS No. 243, The Variscan Chain of Mid and Western Europe, Rennes, 27 September-6 October 1978, 604-640.
[15] Bassot, J.P. (1966) Geological Study of Eastern Senegal and Its Guinea-Malian Borders. Memoires du BRGM, 40, 322 p.
[16] Villeneuve, M. (1984) Geological Study of the SW Border of the West African Craton—The Pan-African Suture and the Evolution of the Proterozoic—Paleozoic Sedimentary Basins on the NW Gondwana Margin. Thèse Doctorat d’Etat, Universite d’Aix-Marseille III, Marseille, 552 p.
[17] Villeneuve, M. (1989) The Geology of the Madina Kouta Basin (Guinea-Senegal) and Its Significance for the Geodynamic Evolution of the Western Part of the West African Craton during the Upper Proterozoic Period. Precambrian Research, 44, 305-322.
[18] Delor, C., Coueffe, R., Goujou, J.-C., Diallo, D.P., Theveniaut, H., Fullgraf, T., Ndiaye, P.M., Dioh, E., Blein, O., Barry, T.M.M., Cocherie, A., Le Metour, J., Martelet, G., Sergeev, S. and Wemmer, K. (2010) Explanatory Notes to the 1/200,000 Geological Map of Senegal, Saraya-East Kedougou Sheet. Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, DMG, Dakar, 195 p.
[19] Diop, S. (1998) Contribution to the Hydrogeology of the Fractured Aquifers Developed within the Crystalline Area of Eastern Senegal: Isotope-Hydrogeochemical Investigations and Water Balances in the Kedougou Area (Districts of Bandafassi, Salemata, Fongolimbi and Saraya). Münster Forsch Geol Palaont, 84, 175-259.
[20] Lee, R.W. (1985) Geochemistry of Groundwater in Cretaceous Sediments of the Southeastern Coastal Plain of Eastern Mississipi and Western Alabama. Water Resources Research, 21, 1545-1556.
[21] Plummer, N., Busby, J.F., Lee, R.W. and Hanshaw, B.B. (1990) Geochemical Modeling of the Madison Aquifer in Parts of Montana, Wyoming and South Dakota. Water Resources Research, 26, 1981-2014.
[22] Travi, Y., Gac, J.Y., Fontes, J.C. and Fritz, B. (1987) Reconnaissance Chimique et Isotopique des Eaux de Pluies au Senegal (A Survey of the Chemical and Isotopic Composition of Rainwater in Senegal). Geodynamique, 2, 43-53.
[23] Krauskopf, K.B. (1967) Introduction to Geochemistry. McGraw-Hill, Inc., New York, St Louis, San Francisco, Toronto, London and Sydney, 721 p.
[24] Garrels, R.M. and Christ, C.L. (1965) Solutions, Minerals and Equilibria. W. H. Freeman, San Francisco, 450 p.

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