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Hindi Journal of Hydrogeology & Hydrologic EngineeringISSN: 2325-9647
Okiwelu AA Author
Subjects of specialization
Affiliation
Geoelectrical; , In-stream, Sand; Mining;, Groundwater and Hydrology
Geophysics Unit, Department of Physics, University of Calabar, Calabar, Nigeria
Biography
"Anthony Afam Okiwelu holds a Ph.D degree in Geophysics from the University of Calabar, Nigeria and MSc. Degree in Geophysics from the University of Ibadan, Nigeria. His main research interest is in magnetics Geodesy and geopotential field models. He has published over thirty articles in local and intrenational per reviewed journals. He is a Professor of Geophysics in Geophysics Unit, Physics Department, University of Calabar, Nigeria,
Publications
Research Article Subscription
Geoelectrical Assessment of the Impact of Indiscriminate In-Stream Sand Mining on Hydrological System of Coastal Aquifers in Oron Local Government Area, Akwa Ibom State, Nigeria
Author(s): Evans UF, Okiwelu AA, Udoinyang EP
Geoelectrical measurement using Schlumberger electrodes array was conducted to assess the impact in-stream sand mining on hydrological system of coastal aquifers. A total of 15 VES was carried out and results were interpreted using manual curve plotting and computer software. The VES results as well as the fluctuations in groundwater level for mining and non-mining sites were compared. The variation of in-situ resistivity of geounit shows that mining sites produced mostly AK and K curve types with comparatively higher values (1042-12827 Ωm). This was contrary to the HQ and H curves with relatively lower resistivity values (162-4736 Ωm) obtained for geolayer of non-mining sites. HQ and H curve types with the associated low resistivity values, complemented with observed
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