Abstract

This project report focuses on the relevance of electrical resistivity method in ground water investigations past research works on the use of this method are mentioned Geology and hydrogeology of the study area are investigated an adapted version of the national verification form for provision of potable water schematic of the Federal Capital Territory FCT maps of the drainage pattern hydro geology geology of the study area and other relevant maps are presented ABEM terameter 300c and other geophysical equipments are employed in measuring resistivity readings over a region of 900 000m2 within the university of Abuja permanent site This region is characterised by rock outcrops of various sizes predominantly granites and quartz Wener array is employed in this survey it is well established from past research work Leoflinch 2001 that depth of fractured rock was 24 5m-VES 1 Current dipoles separation must be three times this depth i e 75m hence electrode separation of 25m is adopted Ten parallel traverses each of length 1000m separated from each other by 100m are marked out over which readings are taken at intervals of 25m From field data apparent resistivity maps are drawn by employing 3d field software low resistivity zones of well fractured rocks which delineated the productive from the unproductive zones are observed as potential harbours for ground water