Application of Dipole-Dipole Electrical Resistivity for Subsurface Probing Within Golf Club Centre of University of Benin Teaching Hospital, Benin City

Abstract

Imaging Electrical Resistivity in two Dimensions to determine and ascertain the degree of erosion threat at the profound University of Benin Learning/Teaching Hospital (UBTH) Golf Club in Ovia North-East Local (district) Government Area, Benin City, Edo State, Nigeria, survey profiles ranging in length from 150 to 170 meters were conducted for subsurface and sub-structural investigations. An electrode spacing (separation) of 10 m was employed. Utilizing the Abem SAS 1000 Terrameter (Resistivity Meter), a dipole-dipole array was utilized to acquire and collect field data. To established the 2-D real resistivity of the subsurface and substructure selected for display, the field data were subjected and processed deploying Dipro software. According to the findings, topsoil, lateritic sand, particle sand, and sandstone beneath the subsurface were visualized. Within the con depth range of 0 to 5 m, the 2D results unveil topsoil with described resistivity obtainable values ranging from 349 to 4555 Ωm. The second obtainable layer is assured of lateritic, sandy sand with mathematical resistivity values between 650 and 3365 Ωm down to 10.0 m. The resistivity values of the third stratum/layer, with displayed range from 568 to 8662 Ωm at a depth of 20 meters, indicate lateritic sand, sand, and sandstone. Lateritic sand, sandstone, and sandstone are found down to 35 meters in the fourth stratum. Sand and sandstone are represented by resistivity values in the fifth horizon, which range from 956 to 22573 Ωm. 50.0 m was the furthest depth that could be imaged. The 2-D resistivity picturing (imagery) indicates the presence of an aquiferous domain (zone) and the non existence of clay division (formation), given that the range of 1-150 ohm-meters distinctively associated and linked up with clay in the study area explained the best and most appropriate area for the construction of buildings. The inverted 2-D resistivity shape (structure) depicts intermediate resistivity observed distribution near-surface >340 Ωm, which are indications (evidences) of vulnerabilities to wearing and erosion in the study area.