Environmental Earth Sciences

, Volume 64, Issue 1, pp 107–118 | Cite as

Estimation of groundwater recharge of shallow aquifer on humid environment in Yaounde, Cameroon using hybrid water-fluctuation and hydrochemistry methods

  • A. Fouépé TakounjouEmail author
  • J. R. Ndam Ngoupayou
  • J. Riotte
  • G. E. Takem
  • G. Mafany
  • J. C. Maréchal
  • G. E. Ekodeck
Original Article


A study of environmental chloride and groundwater balance has been carried out in order to estimate their relative value for measuring average groundwater recharge under a humid climatic environment with a relatively shallow water table. The hybrid water fluctuation method allowed the split of the hydrologic year into two seasons of recharge (wet season) and no recharge (dry season) to appraise specific yield during the dry season and, second, to estimate recharge from the water table rise during the wet season. This well elaborated and suitable method has then been used as a standard to assess the effectiveness of the chloride method under forest humid climatic environment. Effective specific yield of 0.08 was obtained for the study area. It reflects an effective basin-wide process and is insensitive to local heterogeneities in the aquifer system. The hybrid water fluctuation method gives an average recharge value of 87.14 mm/year at the basin scale, which represents 5.7% of the annual rainfall. Recharge value estimated based on the chloride method varies between 16.24 and 236.95 mm/year with an average value of 108.45 mm/year. It represents 7% of the mean annual precipitation. The discrepancy observed between recharge value estimated by the hybrid water fluctuation and the chloride mass balance methods appears to be very important, which could imply the ineffectiveness of the chloride mass balance method for this present humid environment.


Recharge Specific yield Tropical forest Water balance Yaounde GIS 



The present work was supported by grants from the International Foundation for Science (IFS). Sincere thank to Hell J.V., Director of Institute for Geological and Mining Research (IRGM), Yaounde-Cameroon for infrastructure facilities. The authors thank the LMTG Laboratory of Toulouse-France for water samples analysis and two anonymous reviewers who greatly improved the quality of the manuscript.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • A. Fouépé Takounjou
    • 1
    • 2
    Email author
  • J. R. Ndam Ngoupayou
    • 2
  • J. Riotte
    • 3
  • G. E. Takem
    • 1
  • G. Mafany
    • 1
  • J. C. Maréchal
    • 4
  • G. E. Ekodeck
    • 2
  1. 1.Institute for Geological and Mining Research, Hydrological Research CentreYaoundeCameroon
  2. 2.Department of Earth SciencesUniversity of Yaounde IYaoundeCameroon
  3. 3.Indo-French Cell for Water SciencesIndian Institute of ScienceBangaloreIndia
  4. 4.LMTG, Université de Toulouse, CNRS, IRDToulouseFrance

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