[[1] Wattanasen, K., Elming, S. (2008): Direct and indirect methods for groundwater investigations: A case study of MRS and VES in the Southern part of Sweden. Journal of Applied Geophysics, 66, pp. 104–117.10.1016/j.jappgeo.2008.04.005]Search in Google Scholar
[[2] Eze, C. L., Eze, E. M. (2015): Investigation of possible groundwater contamination from septic system siting in Port Harcourt, Nigeria. Journal of Natural Sciences Research, 5(10), pp. 83–87.]Search in Google Scholar
[[3] Asiwaju-Bello, Y. A., Olabode, F. O., Duvbiama, O. A., Iyamu, J. O, Adeyemo, A. A., Onigbinde, M. T. (2013): Hydrochemical evaluation of groundwater in Akure Area, Southwestern Nigeria, for irrigation purpose. European International Journal of Science and Technology, 2(8), pp. 235–249.]Search in Google Scholar
[[4] Hutchinson, P. J., Barta. L. S. (2002): VLF surveying to delineate longwall mine induced fractures. Leading Edge, pp. 491–493.10.1190/1.1481250]Search in Google Scholar
[[5] Olorunfemi, M. O., Fatoba, J. O., Ademilua, L. O. (2005): Integrated VLF-electromagnetic and electrical resistivity survey for groundwater in a crystalline basement complex terrain of Southwest Nigeria. Global Journal of Geological Sciences, 3(1), pp. 71–80.10.4314/gjgs.v3i1.18714]Search in Google Scholar
[[6] Bayewu, O. O., Oloruntola, M. O., Mosuro, G. O., Watabuni, F. G. (2012): Groundwater exploration in Ago-Iwoye Area of Southwestern Nigeria, using Very Low Frequency Electromagnetic (VLF-EM) and electrical resistivity methods. International Journal of Applied Sciences and Engineering Research, 1(3), pp. 452–462. doi: 10.6088/ijaser.002010104610.6088/ijaser.0020101046]Search in Google Scholar
[[7] Yadav, G. S., Singh, P. N., Srivastava, K. M. (1997): Fast method of resistivity sounding for shallow groundwater investigations. Journal of Applied Geophysics, 36, pp. 45–52.10.1016/S0926-9851(97)00009-8]Search in Google Scholar
[[8] Sundararajan, N., Nandakumar, G., Chary, M. N., Ramam, K. Srinivas, Y. (2007): VES and VLF—an application to groundwater exploration, Khammam, India. The Leading Edge, pp. 708–716.10.1190/1.2748489]Search in Google Scholar
[[9] Muchingami, I., Hlatywayo, D. J., Nel, J. M., Chuma, C. (2012): Electrical resistivity survey for groundwater investigations and shallow subsurface evaluation of the basaltic-greenstone formation of the urban Bulawayo aquifer. Physics and Chemistry of the Earth, 50–52, pp. 44–51.10.1016/j.pce.2012.08.014]Search in Google Scholar
[[10] Odusanya, B. O., Amadi, U. M. P. (1990): An empirical resistivity model for predicting shallow groundwater in the Basement Complex Water Resources. Journal of Nigeria Association of Hydrogeologists, 2, pp. 77–87.]Search in Google Scholar
[[11] Olayinka, A. I., Olorunfemi, M. O. (1992): Determination of geoelectrical characteristics in Okene area and implication for borehole siting. Journal of Mining and Geology, 28, pp. 403–412.]Search in Google Scholar
[[12] Olorunfemi, M. O., Fasuyi, S. A. (1993): Aquifer types and the geoelectric/hydrogeological characteristics of part of the central basement terrain of Nigeria (Niger State). Journal of African Earth Sciences, 16(3), pp. 309–316.10.1016/0899-5362(93)90051-Q]Search in Google Scholar
[[13] Dan-Hassan, M. A., Olorunfemi, M. O. (1999): Hydro-geophysical investigation of a basement terrain in the north central part of Kaduna State, Nigeria. Journal of Mining and Geology, 35(2), pp. 189–206.]Search in Google Scholar
[[14] Adepelumi, A. A., Akinmade, O. B., Fayemi. O. (2013): Evaluation of groundwater potential of Baikin Ondo State, Nigeria using resistivity and magnetic techniques: a case study. Universal Journal of Geoscience, 1(2), pp. 37–45.10.13189/ujg.2013.010201]Search in Google Scholar
[[15] Akinrinade, O. J., Olabode, O. P. (2015): Integrated geophysical approach to aquifer delineation in crystalline basement environment. International Journal of Scientific and Engineering Research (IJSER), France, 6(10), pp. 107–127.]Search in Google Scholar
[[16] Harb, N., Haddad, K., Farkh, S. (2010): Calculation of transverse resistance to correct aquifer resistivity of groundwater saturated zones: implications for estimating its hydrogeological properties, Lebanese Science Journal, 11(1), pp. 105–115.]Search in Google Scholar
[[17] Hutchinson, P. J., Beird, M. H., Mitchell, M. (2010): Groundwater purveying using very low frequency fracture delineation methods. Proceedings from the 2010 Symposium on the Application of Geophysics to Engineering and Environmental Problems, pp. 294–301. http://geo-image.com/documents/30.pdf10.4133/1.3445446]Search in Google Scholar
[[18] Hanchar, D. W. (1991): Effects of septic-tank effluent on groundwater quality in northern Willianson County and southern Davidson County, Tennessee. Water Resources Investigations Report 91–4011, US Geological Survey.]Search in Google Scholar
[[19] Panagiotakis, I., Dermatas, D., Vatseris, C., Chrysochoou, M., Papassiopi, N., Xenidis, A., Vaxevanidou, K. (2015): Forensic investigation of a Chromium VI groundwater plume in Thiva, Greece. Journal of Hazardous Materials, 281, pp. 27–34.10.1016/j.jhazmat.2014.09.04825450516]Search in Google Scholar
[[20] Banda, L. J., Mbewe, A. R., Nzala, S. H., Halwindi, H. (2014): Effect of siting boreholes and septic tanks on groundwater quality in St. Bonaventure Township of Lusaka District, Zambia. International Journal of Environmental Sciences Toxic Research, 2(9), pp. 191–198.]Search in Google Scholar
[[21] McQuillain, D. (2004): Ground-Water Quality Impacts From On-Site Septic Systems. Proceedings of 13th Annual Conference on National Onsite Wastewater Recycling Association, Albuquerque, New Mexico, pp. 1–13.]Search in Google Scholar
[[22] Henriet, J. P. (1976): Direct application of the Dar Zarrouk parameters in groundwater surveys. Geophysics Prospective, 24, pp. 344–353.10.1111/j.1365-2478.1976.tb00931.x]Search in Google Scholar
[[23] Oladapo, M. I., Mohammed, M. Z., Adeoye, O. O., Adetola, B. A. (2004): Geoelectric investigation of the Ondo State Housing Corporation Estate, Ijapo Akure, southwestern Nigeria. Journal of Mining and Geology, 40(1), pp. 41–48.]Search in Google Scholar
[[24] Iloeje, N. P. (1981): A New Geography of Nigeria (New revised edition). Longman Nigeria Limited, Lagos, p. 201.]Search in Google Scholar
[[25] Rahaman, M. A. (1976): Review of the basement geology of southwestern Nigeria. In Geology of Nigeria, C. A. Kogbe (Ed.), Elizabethan Publishers, Lagos, pp. 41–58.]Search in Google Scholar
[[26] Omosuyi, G. O., Adegoke, A. O., Adelusi, A. O. (2008): Interpretation of Electromagnetic and Geoelectric Sounding Data for Groundwater Resources around Obanla-Obakekere, near Akure, Southwestern Nigeria. Pacific Journal of Science and Technology, 9(2), pp. 509–525.]Search in Google Scholar
[[27] Owoyemi, F. B. (1996): A Geological-Geophysical Investigation of Rain-Induced Erosional Features in Akure Metropolis. Unpublished M.Tech Thesis, Federal University of Technology Akure, Nigeria, pp. 11–18.]Search in Google Scholar
[[28] Karous, M., Hjelt, S. E. (1983): Linear filter of VLF dip-angle measurements. Geophysical Prospecting, 31, pp. 782–794.10.1111/j.1365-2478.1983.tb01085.x]Search in Google Scholar
[[29] Poehls, D. J., Smith, G. J. (2009): Encyclopedic Dictionary of Hydrogeology. Elsevier Academic Research Incorporation, Amsterdam, ISBN 978-0-12-558690-0, p. 518.]Search in Google Scholar