SUBSURFACE INVESTIGATION USING ELECTRICAL RESISTIVITY METHOD

Adegbola R. B., Abidoye O. E.

Abstract


A geophysical investigation using the vertical electrical sounding (VES) and 2D electrical resistivity methods were carried out at Iba Estate Nursery and Primary School, Iba, Lagos State, Nigeria to determine the subsurface layer parameters which are resistivity values and thicknesses to categorize the ground-water potential of the study area. The Instrument used was PASI Terrameter. Vertical Electrical Sounding (VES) with Schlumberger array was conducted at ten (10) VES stations. The data obtained were analysed using computer software (WinResist) which gives an automatic interpretation of the apparent resistivity. The results showed that four to five geologic layer formations dominated the study area. The resistivity values were of range between 14.7 to 6460.0 ohms-meter and their thickness values vary from 0.4 to 123.2 m. 2-D resistivity structures were also obtained to further affirmed two dimension natures of the subsurface. It can be inferred that the suitable aquifer will be at the third layer of the subsurface. 


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References


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