RESISTIVITY METHOD FOR GROUNDWATER PROSPECTING: A CASE STUDY OF ARMY ENGINEERS QUARTERS ZARIA ROAD, JOS, PLATEAU STATE NIGERIA

T S Dauda, E S Akanbi

Abstract


 The problem of water scarcity is one of the serious challenges faced by the residents of Army Engineers Quarters,

Zaria Road, Jos. This study was carried out with the aim of finding a suitable location to site a community

borehole. Electrical Resistivity method was employed in the site investigation of five (5) selected random using

Vertical Electrical Sounding (VES) procedure of Schlumberger array. The apparent resistivity data obtained were

processed using the RES1D ver 1.00.09 Beta software and the resulting sounding curves interpreted to provide

the true resistivity of each layer, thickness of each layer, depth to basement and overburden thickness. The

sounding curves revealed weathered/fractured basement within the overburden and fracture within the fresh

basement as regions of low resistivity. From the qualitative and quantitative interpretation of the VES curves, all

the VES locations have probable groundwater potential either in the weathered/fractured basement zones of the

overburden or within fresh basement fracture zones. VES 4 has good ground-water potential in both. The study

also revealed a subsurface underlain by three layers; topsoil, weathered/fractured basement and fresh basement.

The interpreted results revealed that VES 4 location is the most suitable to site the community borehole.

Key Words : Electrical Resistivity, Ground-water, Basement, Fracture, Layers


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