GEO-ELECTRICAL STUDY OF GROUND WATER POTENTIAL IN KWALI AREA OF ABUJA, NIGERIA

Geo-electrical study was carried out in Kwali Area of Abuja, Nigeria in order to access the groundwater potential. The area was investigated as a result of unproductive borehole situated in the area of study. Fifteen (15) Schlumberger Vertical Electrical Sounding (VES) were employed. The VES data were processed and interpreted by partial curve matching and Win RESIST software. Four geoelectric sections generated from the interpreted VES results show four geo-electrical layers which correspond to topsoil, ferrogenised sandstone, fractured basement and basement. The topsoil with thickness between 1.0-1.5 m and values of resistivity varying from 135 -996 ohm-m, while the ferrogenised sandstone has values of thickness between 2.2 -6.5 m with resistivity values ranging from 24 -503 ohm-m. The fractured basement has height values varying from 4.8 -26.2 m and resistivity values ranging from 321 -733 ohm-m while the basement has values of resistivity ranges 490 -1181ohm-m and thickness was not determined due to current termination. Thus, the quantitative analysis reveals that the fractured basement denotes aquifer units where the groundwater could be tapped within the study area.