TITLE:
2D Electrical Resistivity Imaging for Delineation of Crystalline Basement Aquifer in Northern Ghana
AUTHORS:
Akwasi Acheampong Aning, Charles Kwabena Sarfo, Patrick Amankwaa Mainoo, Reginald Mensah Noye
KEYWORDS:
Electrical Resistivity Imaging, Ghana, Crystalline, Aquifer, Mapping
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.7 No.12,
December
17,
2019
ABSTRACT: Lack of access to potable and
adequate water is a major problem for sustainable development in northern
Ghana. Developing groundwater resource is the best option for safe, reliable,
and cost-efficient water supplies to these dispersed communities. In this
study, nine 2D ERI profiles were carried out with the Schlumberger array in
eight communities underlain by the crystalline basement rocks in the Bole
District of the Savannah Region of Ghana. The aim was to delineate the aquifer
zones and select points for groundwater extraction. Nine boreholes were drilled
from the selected points. The yield was found to vary from 12 to 180 l/min with
a depth range of 50 to 70 m. The weathered and fractured zones together with
the bedrock topography were clearly marked. It is evident that the 2D
electrical resistivity technique is useful
tool in determining the availability of groundwater in weathered and fractured crystalline environment.