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Groundwater Deductions from Geoelectric Survey in Burutu Island, Delta State, Nigeria
並列摘要
A resistivity survey was carried out in order to study the groundwater conditions in Burutu Island, the thickness, depth, location of aquifer and type of aquifer were determined utilizing the surface Schlumberger electrode array with maximum current electrode spacing of 300 m. A total of 4 VES stations were sounded and seven geoelectric layers were delineated in the survey area. The first layer was top soil with resistivity values ranging from (54-893 Ωm) and thickness between (0.5-1.4 m). The second layer had a resistivity ranging from (24.82-2768.0 Ωm) and thickness of (2.03-3.71 m) consisting of fine to medium sand. The third to fifth geoelectric layers consist of sandy clay sand with thickness varying from (3.12-17.23 m) and resistivity values of (1.21- 163.91Ωm) which indicates saline intruded water zone. The results of the VES interpretation shows that a good source of aquifer was encountered at a depth of 49 m with a thickness of 19m which extends into the seventh layer. The results of the resistivity survey revealed that the parameters obtained through the interpretation of the VES curve using Win Resist software corresponds to the litholog of the borehole close to VES 4.