This study concerns the use of isotope techniques to assess groundwater resource management in mining area. The objective of the study is first to estimate the groundwater residence time in the peninsula of Ampasindava and secondly to determine the relationship between wastewater from mining activity and groundwater resource in the study area by using environmental isotopes. It will contribute to clarifying the impact of the mining activity waste water on the groundwater in the study area. The stable isotopes of oxygen and hydrogen were used to understand groundwater recharge process and its origin. Tritium was used to estimate the groundwater residence time and hydrochemical tools helped identify the groundwater chemical facies. A simulation based on mathematical model was applied to estimate the groundwater residence time using the tritium concentration value of each groundwater sample. As results, the groundwater geochemical characteristics in the Ampasindava peninsula show two different water types. This assumption was confirmed by the isotope signature of the water samples. The results of the simulation run under exponential and dispersion models showed higher values of groundwater age for the spring waters compared to the groundwater age using a piston flow model. It suggests that spring waters are older than groundwater in the alluvium plains. The spring water seems to be protected from rare earth mining exploitation pollution. On the contrary, the mining exploitation could be a source of contamination of the groundwater in the alluvium plain.
Cite this paper
Fareze, L. P. , Rajaobelison, J. , Ramaroson, V. , Razafitsalama, F. F. A. and Rakotomalala, C. U. (2022). Groundwater Residence Time Modelling in the Aquifers of the Ampasindava Peninsula, Northwestern of Madagascar. Open Access Library Journal, 9, e9007. doi: http://dx.doi.org/10.4236/oalib.1109007.
Downing, B.D., Bergamaschi, B.A., Kendall, C., Kraus, T.E.C., Dennis, K.J., Carter, J.A. and Von Dessonneck, T.S. (2016) Using Continuous Underway Isotope Measurements to Map Water Residence Time in Hydrodynamically Complex Tidal Environments. Environmental Science & Technology, 50, 13387-13396.
https://doi.org/10.1021/acs.est.6b05745
Glynn, P.D. and Plummer, L.N. (2005) Geochemistry and the Understanding of Groundwater Systems. Hydrogeology Journal, 13, 263-287.
https://doi.org/10.1007/s10040-004-0429-y
Plummer, L.N., Bexfield, L.M. anderholm, S.K., Sanford, W.E. and Busenberg, E. (2004) Geochemical Characterization of Groundwater Flow in the Santa Fe Group Aquifer System, Middle Rio Grande Basin, New Mexico, U.S. Geological Survey Water-Resources Investigations Report 03-4 I 3 l.
Böhlke, J.K. and Denver, J.M. (1995) Combined Use of Groundwater Dating, Chemical, and Isotopic Analyses to Resolve the History and Fate of Nitrate Contamination in Two Agricultural Watersheds, Atlantic Coastal Plain, Maryland. Water Resources Research, 31, 2319-2339. https://doi.org/10.1029/95WR01584
Lindsey, B.D., Phillips, S.W., Donnelly, C.A., Speiran, G.K., Plummer, L.N., Bohlke, J.K., Focazio, M.J., Burton, W.C. and Busenberg, E. (2003) Residence Times and Nitrate Transport in Ground Water Discharging to Streams in the Chesapeake Bay Watershed. US Geological Survey Water-Resources Investigations Report 03-4035, 201 p.
Shapiro, S.D., Busenberg, E., Focazio, M.J. and Plummer, L.N. (2004) Historical Trends in Occurrence and Atmospheric Inputs of Halogenated Volatile Organic Compounds in Untreated Ground Water Used as a Source of Drinking Water. Science Total Environment, 321, 201-217.
https://doi.org/10.1016/j.scitotenv.2003.09.007
Dussarat, B. (1994) Structure et fonctionnement des aquifères de socle altéré en zone tropicale d’altitude cas du bassin de Mahitsy. Thèse de doctorat, 143 p.
Melluso, L. (2007) Petrogenesis of a Basanite-Tephrite-Phonolite Volcanic Suite in the Bobaomby (Cap d’Ambre) Peninsula, Northern Madagascar. Journal of African Earth Sciences, 49, 29-42. https://doi.org/10.1016/j.jafrearsci.2007.06.002
Małoszewski, P. and Zuber, A. (1996) Lumped Parameter Models for the Interpretation of Environmental Tracer Data. Manual on the Mathematical Models in Isotope Hydrogeology. IAEA-TECDOC-9109-58.
Kreft, A. and Zuber, A. (1978) On the Physical Meaning of the Dispersion Equation and Its Solution for Different Initial and Boundary Conditions. Chemical Engineering Science, 33, 1471-1480. https://doi.org/10.1016/0009-2509(78)85196-3
Piper, A.M. (1944) A Graphic Procedure in Geochemical Interpretation of Water Analysis. Transactions of the American Geophysical Union, 25, 914-928.
https://doi.org/10.1029/TR025i006p00914
Fontes, J.C. (1976) Isotopes du milieu et cycles des eaux naturelles: Quelques aspects. Thèse de doctorat d’état, Université Pierre et Marie Curie, Paris VI, Paris, 208 p.
Subyani, A.M. (2004) Use of Chloride-Mass Balance and Environmental Isotopes for Evaluation of Groundwater Recharge in the Alluvial Aquifer, Wadi Tharad, West Saudi Arabia. Environmental Geology, 46, 741-749.
https://doi.org/10.1007/s00254-004-1096-y
Fontes, J.C., Yousfi, M. and Allison, G.B. (1986) Estimation of Long-Term, Diffuse Groundwater Discharge in the Northern Sahara Using Stable Isotope Profiles in Soil Water. Journal of Hydrology, 86, 315-327.
https://doi.org/10.1016/0022-1694(86)90170-8
Gat, J.R. (1980) The Isotopes of Hydrogen and Oxygen in Precipitation. In: Fritz, P. and Fontes, J.C., Eds., Handbook of Environmental Isotope Geochemistry, Elsevier, Amsterdam, 21-47. https://doi.org/10.1016/B978-0-444-41780-0.50007-9
Gat, J. and Carmi, L. (1970) Evolution of the Isotopic Composition of Atmospheric Waters in the Mediterranean Sea Area. Journal of Geophysical Research, 75, 3039-3048.
https://doi.org/10.1029/JC075i015p03039
Craig, H. (1961) Standard for Representing Concentrations of Deuterium and Oxygen-18 in Natural Waters. Science, 133, 1833-1834.
https://doi.org/10.1126/science.133.3467.1833
Plummer, L.N., Prestemon, E.C. and Parkhurst, D.L. (1994) An Interactive Code (NETPATH) for Modeling NET Geochemical Reactions along a Flow Path. Version 2.0, U.S. Geological Survey Water-Resources Investigations Report 94-4169, 130 p.
Sambienou, W.G., Gourcy, L., Alassane, A., Kaki, C., Tossou, Y.Y.J., Mama, D., Boukari, M. and Zouari, K. (2018) Flow Pattern and Residence Time of Groundwater within Volta River Basin in Benin (Northwestern Benin). Journal of Water Resource and Protection, 10, 663-680.
https://doi.org/10.4236/jwarp.2018.107038
Beyerle, U. (2002) Groundwater Dating Using Environmental Tracers and Black Box Models. A Survey of Methods for Groundwater Recharge in Arid and Semi-Arid Regions. UNEP/DEWA/RS.02-2.
Li, X., Zhang, L. and Hou, X. (2008) Use of Hydrogeochemistry and Environmental Isotopes for Evaluation of Groundwater in Qingshuihe North of China. Hydrogeology Journal, 16, 335-348. https://doi.org/10.1007/s10040-007-0269-7
Fareze, L.P. (2016) Modélisation des eaux souterraines utilisant la technique isotopique dans l’aquifère sédimentaire du bassin Mahafaly Sudouest de Madagascar. Thèse de doctorat, Université d’Antananarivo, Madagascar, 139 p.
Ce qu’il importe de savoir sur le projet d’exploitation des terres rares d’Ampasindava.
https://madagascar-tribune.com/Ce-qu-il-importe-de-savoir-sur-le,23234.html
