Yalo Nicaise, dÃ¢ÂÂAlmeida GÃÂ©rard F, Dovonou Flavien, Lawin A. Emmanuel andGnammi Yoro Ibrahim R.D
Estimation of hydrogeological parameters in a coastal sandy aquifer is not easy using pumping tests and drilling boreholes. Geophysical methods could be used in resolving this problem. Gravimetric method and Vertical Electrical Soundings haven been used in this study. Hydrogeological parameters have been estimated for the shallow coastal aquifer. Thus, the average aquifer porosity is about 34%, the thickness of the aquifer is in the range of 19 – 21m, hydraulic conductivity about 4.6x10-2m/s and transmissivity 3.91x10-4m2/s. These parameters correlated well with calculated parameters using gravimetric method. The range of aquifer parameter values obtained using electrical method is a good indication of the reliability of this method. The electrical method has allowed estimating the aquifer parameters and could be used for mapping their spatial distribution.
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