International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 9, September 2017

International Journal of Science and Technology


A Preliminary Approach to the Groundwater Potential Appraissal of Ekiti State, Southwestern Nigeria

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Author Bayowa O. Gabriel, Olorunfemi O. Martins, Akinluyi O. Francis, Ademilua O. Lawrence
On Pages 48-58
Volume No. 4
Issue No. 3
Issue Date March 01, 2014
Publishing Date March 01, 2014
Keywords basement complex, lineament density, groundwater potrential, hydrogeologic, geomorphorlogical


Abstract

A preliminary investigation involving the collection, interpretation and analyses of hydrogeomorphological, geologic/hydrogeologic data have been carried out in the Basement Complex terrain of Ekiti State, Southwestern Nigeria with the objective of a first hand assessment of the groundwater potential of the state, to serve as an informed useful and instant aid to the current efforts of the state government at providing pottable water for the ever growing population of the state through the drilling of boreholes as well as a formidable launch pad for subsequent research efforts along this direction . The Topographic map and Landsat Mapper (TM) satellite imagery (1986) of the study area were acquired and processed using the ArcGIS and ERDAS Imagine Software. The hydrogeomorphological, lineament density and lineament intersection density maps were generated from the processed remote sensing data for the preliminary assessment of the study area. Hydrogeomorphological, lineament density and lineament intersection density maps were produced and integrated for the classification of the study area into different groundwater potential zones. Five hydrogeomorphological units including hills/ridges, pediments, pediplains, pediplain with alluvium, and valleys were delineated in the study area. The lineament map showed that the linear structures in the study area generally trend along N-S, ENE-WSW, E-W and NW-SE directions. The lineament intersection nodes dominated the northwestern, western and south-eastern parts of the study area. Both the hydro-significant lineament and lineament intersection density maps revealed five (5) lineament cluster zones. Based on the foregoing, the study area was characterized into five different groundwater potential zones which are very low, low, moderate, high and very high groundwater potential zones.

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