Progrès de la recherche en sciences appliquées Libre accès

Abstrait

Subsurface Characterization using Electrical Resistivity(Dipole-Dipole) method at Lagos State University (LASU) Foundation School, Badagry

Abiola S. Ogungbe, Joseph A. Olowofela, Olabode J. Da-Silva, Aderemi A. Alabi and Eugene O. Onori

2-D resistivity inversion survey technique of electrical resistivity method was undertaken at Lagos State University (LASU) Foundation School, along Topo-Ascon road in Badagry Local Government Area of Lagos State with a view to mapping the subsurface characterization for borehole development. Dipole-dipole configuration covering the entire area was conducted using the ABEM Terrameter SAS 1000 and inter-electrode spacing of 10m, 20m, 30m and 40m were used in the traverse. The data were processed by creating a pseudo-section of the apparent resistivity values using DIIPRO software. Computer iterations were then carried out and twodimensional (2-D) resistivity contour maps were created. Four different types of soil formations were observed from the beginning to the end of the traverse but to a depth of about 2.3m while a uniform layer of clayey sand is shown on the traverse from a depth of about 2.3m to 5.0m.The areas that have favourable resistivity with appreciable thickness are sand formations.