Geophysical and Geotechnical Investigation of River Ero, Ajuba, Southwestern Nigeria for Dam Development

Full Text PDF PDF
Author(s) Akinrinmade, A.O | Ogunsanwo, O | Ige, O.O
Pages 518-528
Volume 2
Issue 7
Date July, 2013
Keywords Geotechnical, Geophysical, Ajuba, Permeability, VES.
Abstract

Dams are among common large engineering structures and a major amenity that enhances quality life. Thus, design and construction should be preceded by adequate investigation to prevent collapse and its consequences. Geophysical and geotechnical investigations have been carried out around River Ero Ajuba-Osi area, Southwestern Nigeria. This was aimed at harnessing the potential of the river for the purpose of earth or rock-filled dam development to meet high water demand by neighboring communities. The satellite image together with the geological map of the area was analyzed and interpreted with ArcGIS version 10.0. Reconnaissance survey shows that construction materials are available at economic hauling distance while total of 7 Vertical Electrical Sounding carried out across the river course using Schlumberger array revealed minor fractures. Also, geotechnical assessment of soil samples revealed that they are generally well graded with moderate internal friction angle and suitable bearing capacity. The study concluded that material availability, perennial discharge of the river in addition to suitable geology and engineering properties around River Ero will enhance development of either earth or rock filled dam.

< Back to July Issue