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A Further Comprehensive Approach To Assessing The Groundwater Potential Of The Basement Complex Terrain Of Ekiti State Southwestern Nigeria.

Journal: International Journal of Scientific & Technology Research (Vol.3, No. 7)

Publication Date:

Authors : ; ; ; ;

Page : 35-46

Keywords : Keywords overburden; transmissivity; hydrogeophysical; groundwater; aquifer;

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ABSTRACT Hydrogeophysical investigation as well as analyses of hydrogeomorphological geologichydrogeologic electrical resistivity and borehole data has been carried out in the Basement Complex terrain of Ekiti State Southwestern Nigeria. This is a second and further step to validate and consolidate on the results from the earlier preliminary approach of Bayowa etal 2014b with a view to identifying the hydrogeologicgeoelectric characteristics of the area and classifying the area into different groundwater potential zones. The VES interpretation results were used for aquifers identification aquifers geoelectric parameter determination and for the calculation of the overburden coefficient of anisotropy for each of the parametric VES. Hydrogeomorphological lineament density lineament intersection density and overburden coefficient of anisotropy thematic maps were produced and integrated for the classification of the study area into different groundwater potential zones. The reliability of the groundwater potential map was checked with the existing groundwater yield data. The groundwater yields of boreholes located on quartzitic rocks had a mean of 1.56 ls while the mean groundwater yield from metasediment schist was 1.14 ls. The study area was characterized into five different groundwater potential zones which are very low low moderate high and very high. Ijelu-Ekiti Ayede Ipao Ikole Oye. Ayegbaju Ofale-Ijero and Omuo-Ekiti were classified by very low groundwater potential while low groundwater potential was established in Ijesa-Isu Iludofin Iyemero Esure Otun Osi Iropora Ifaki Ikun Ijero Ado Emure and IseOrun. Igbara-Odo Ilawe Ikogosi Ido Ipole-Iloro Ipere Ayetoro Ikoro Ifisin Ilogbo Isinbode Erinmope and Iwaro fall within moderate groundwater potential zones. High groundwater potential was recorded in Ijan Okemesi Aramoko Ilemeso Ikere Etisun and Itawure. Efon-Alaaye and Ilumoba fall within very high groundwater potential zone. The groundwater potential of Ekiti State is generally of very low moderate level rating. There are however few areas with high to very high groundwater potential.

Last modified: 2015-06-28 03:58:51