n Journal of Emerging Trends in Engineering and Applied Sciences - Groundwater assessment in Apapa coast-line area of Lagos using electrical resistivity method

Volume 2, Issue 4
  • ISSN : 2141-7016
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A study was conducted on some physical characteristics of geological formations in Apapa, a coast-line area of Lagos state with the purpose of determining the extent of deterioration in the quality and quantity of the groundwater due to saline water intrusion and other factors. Applying the Schlumberger configuration of Vertical electrical sounding, (VES) on five locations, data were collected and analysed using both the partial curve matching and microprocessor iterative techniques. Geoelectric sections along XX - XX', comprising of VES point 3 and 1, and along YY - YY' made up of VES points 1 and 4 were generated along south-north and West-East directions respectively. The analysed data revealed the presence of sand, clay, sandy clay, clayey sand formations and some intrusions of saline water in the area. The results also indicated that the safest depth for groundwater (devoid of saline intrusion) is 34 m and beyond.

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