Application of Geophysical Methods for Investigation of Groundwater Potential in Layunrun Village, Ogun State, Southwestern Nigeria

Abstract

An investigation of the groundwater potential of the area for tube well construction has been conducted in Layunrun village in a typical  basement complex of Ogun State using electromagnetic and electrical resistivity techniques in geophysical exploration. Six (6)  electromagnetic profiles were used, and twenty-eight (28) Vertical Electrical Soundings (VES) were performed along some of the profiles' potential regions. The typical partial curve matching utilized to create the VES curves was examined, and the results were used to create  themed maps of the region. Within the study area, between four and six geoelectric layers were found. These layers are Topsoil,  weathered layer (clay), weathered layer, fractured basement, and fresh basement. According to the findings, a bigger percentage of the  land has an overburden thickness ranging from 9 to 17 m, with a maximum overburden of about 23 m. It also showed how well fractured  the research area is, with thicknesses of the fractures varying from about 12 m to more than 30 m. The study area has a good chance of  accumulating groundwater and, consequently, developing groundwater through digging boreholes. The outcomes also suggested that a community with similar geological settings may use the electromagnetic method in addition to the electrical resistivity method to identify  places with high groundwater potentials.