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Journal of Environmental Hydrology
ISSN 1058-3912 |
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Electronic Journal of the International Association for
Environmental Hydrology
JEH Volume 18 (2010), Paper 4 Posted February 6, 2010 ISOTOPE HYDROLOGY AND HYDROCHEMISTRY OF WATER RESOURCES IN THE BANANA PLAIN (MUNGO-DIVISION) OF THE CAMEROON VOLCANIC LINE
Andrew A. Ako1,2 ABSTRACT The isotope hydrology and hydrochemistry of surface and groundwater of the Banana Plain were studied to trace the origin of groundwaters and evaluate the major ion chemistry and geochemical processes controlling water composition. Water samples from rain, streams, lake, springs, wells and boreholes were collected and analyzed for major ions, stable isotopes, tritium and dissolved silica. 18O and 2H data indicate that groundwater has been recharged by meteoric water without significantly being affected by evaporative processes either during or after the recharge process. Evaluation of the groundwater residence time demonstrated that groundwater in the Banana Plain aquifers should be considered as a renewable water resource. In general the waters are Ca/HCO3 and Ca-Mg-Na/HCO3 dominated. Weathering of silicate minerals controls the concentration of major ions such as calcium, magnesium, sodium and potassium while NO3 and Cl are of anthropogenic origin. Chemical composition of the groundwater in this area is influenced by rock-water interactions. Reference: Ako, A.A, J. Shimada, K. Ichiyanagi, K. Koike, T. Hosono, G.E.T. Eyong, and I. Iskandar. 2010. Isotope hydrology and hydrochemistry of water resources in the Banana Plain (Mungo-Division) of the Cameroon Volcanic Line. Journal of Environmental Hydrology, Vol. 18, Paper 4. CONTACT: Andrew A. Ako Graduate School of Science and Technology Kumamoto University Kumamoto, Japan E-mail: akoandrewako@yahoo.com |
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