BOREHOLE YIELD ESTIMATION FROM ELECTRICAL RESISTIVITY MEASUREMENTS – A CASE STUDY OF GARU TEMPANE AND BAWKU WEST DISTRICTS, UPPER EAST REGION, GHANA By Albert Acheampong (BSc. Geological Engineering) A thesis submitted to the Department of Geological Engineering, Kwame Nkrumah University of Science and Technology in partial fulfilment of requirements for the award of the degree of MASTER OF SCIENCE IN GEOPHYSICAL ENGINEERING MAY 2017