Groundwater Potentials of Some Parts of the Federal Capital Territory, Abuja, Nigeria.
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Date
2016
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National University of Science and Technology, Bulawayo, Zimbabwe.
Abstract
A hydrogeophysical study was carried out in some parts of the Basement Complex terrain of Abuja, the Capital of Nigeria, to investigate the groundwater potential of the subsurface layers. Severe water shortage due to increase in population, social and economic activities has prompted this study on the development of the groundwater resources. Schlumberger Vertical Electrical Soundings (VES) for groundwater exploration in the Nigerian Police barracks in some parts of the Federal Capital Territory, Abuja, Nigeria were carried out with a view to establishing the different subsurface geoelectric layers and the aquifer units. Data were collected from several VES stations at Utako, Dei-Dei, Wuse 2 and Kuje Junction barracks. From the quantitative interpretations of the data collected, using the usual method of curve matching with the Orellana-Mooney Master curves and 1-D forward modeling with WinResist 1.0 version software, between three and four lithologic units were identified in these areas. These include: the topsoil, the weathered basement, the fractured basement and the fresh bedrock. The weathered layer and the fractured basement constitute the main aquifer units. The depth to bedrock at the chosen VES locations vary from 3.8 to 15.1 m in the study area. The geoelectrical interpretations of data obtained in these areas have permitted the delineation of some lobes or areas of low resistivity which constitute the prospective zones for water exploration in these areas.
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Keywords
Basement, Groundwater, Electrical, Soundings, Weathered, Fractured