HYDRAULIC CHARACTERISTICS OF A TYPICAL BASEMENT COMPLEX AQUIFER IN AJAOKUTA, SOUTHWESTERN NIGERIAHYDRAULIC CHARACTERISTICS OF A TYPICAL BASEMENT COMPLEX AQUIFER IN AJAOKUTA, SOUTHWESTERN NIGERIA

To establish the feasibility of water supply in a basement complex area of Ajaokuta, Southwestern Nigeria, pumping test results were used to investigate the storage properties and groundwater potential of the aquifer. The aquifer system consists of weathered and weathered/fractured zone of decomposed granitic rock with quartz veins. Kazemi et al. (1969) straight line method (observation well) of draw-down analysis in an unconfined aquifer (0=1) yield fracture transmissivity', fracture storativity and matrix storativity o f57.83 m day, 2.91 X 10٠' and 7.49 « 10 ا respectively. These values are reasonably high. The well efficiency of the test well is 83% and discharge rate of 25m١/hour (6OOmرذ day). The result is reasonably good and indicative of good groundwater potential.