Geophysical evaluation of groundwater potential in part of southwestern Basement Complex terrain of Nigeria
| Autor: | T. A. Laniyan, Julius O. Fatoba, Moroof O. Oloruntola, G. O. Mosuro, Stephen O. Ariyo, O.O. Bayewu |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
0208 environmental biotechnology 02 engineering and technology Groundwater potential 01 natural sciences Resistivity survey lcsh:Water supply for domestic and industrial purposes Prospecting Geomorphology Wadi 0105 earth and related environmental sciences Water Science and Technology geography lcsh:TD201-500 geography.geographical_feature_category Hydrogeology Electrical resistance survey VLF-EM Geophysics 020801 environmental engineering Vertical electrical sounding Basement (geology) Fracture Geoelectric layer Geology Groundwater Gneiss VES |
| Zdroj: | Applied Water Science, Vol 7, Iss 8, Pp 4615-4632 (2017) |
| ISSN: | 2190-5495 2190-5487 |
| DOI: | 10.1007/s13201-017-0623-4 |
| Popis: | The geophysical assessment of groundwater in Awa-Ilaporu, near Ago Iwoye southwestern Nigeria was carried out with the aim of delineating probable areas of high groundwater potential. The area falls within the Crystalline Basement Complex of southwestern Nigeria which is predominantly underlain by banded gneiss, granite gneiss and pegmatite. The geophysical investigation involves the very low frequency electromagnetic (VLF-EM) and Vertical Electrical Sounding (VES) methods. The VLF-EM survey was at 10 m interval along eight traverses ranging between 290 and 700 m in length using ABEM WADI VLF-EM unit. The VLF-EM survey was used to delineate areas with conductive/fractured zones. Twenty-three VES surveys were carried out with the use of Campus Ohmega resistivity meter at different location and at locations areas delineated as high conductive areas by VLF-EM survey. The result of VLF-EM survey along its traverse was used in delineating high conductive/fractured zones, it is, however, in agreement with the delineation of the VES survey. The VES results showed 3–4 geoelectric layers inferred as sandy topsoil, sandy clay, clayey and fractured/fresh basement. The combination of these two methods, therefore, helped in resolving the prospecting location for the groundwater yield in the study area. |
| Databáze: | OpenAIRE |
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