Geoelectric Investigation Of Araromi Area Of Akure, Southwestern Nigeria

Abstract

Geoelectric resistivity sounding has been carried out at Araromi area, Akure, southwest Nigeria, an area underlain by Basement complex rocks. Eighteen wenner vertical electrical sounding were carried out along six traverses. Three geologic units which are Topsoil/Laterite, weathered Basement and fresh Basement were identified. Isopach, corrosivity, total longitudinal conductance, iso-resistivity and coefficient of anisotropy maps were generated from the combination of the first and second order geoelectric parameters. Isopach map of overburden revealed bedrock depressions, which serve  as groundwater collection center. The longitudinal conductance map enabled the classification of the area into zones of good (0.7-1.0),moderate (0.2-0.65) an weak protective capacity(0.15).The results not only reasonably provide a basis for which groundwater potential zones were appraised for safety in case industrial facilities are planned for the area but also present environmental factors that should be considered at planning stages of residential and industrial estates.

Key words:Geoelectric,Resistivity,Sounding,Parameters,Basement,groundwater,Environmental.