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Effect of Open Dumpsite on Undeground Water in Ganmo,Ifelodun LGA, Kwara State, North Central Nigeria.

Sunmonu, L. A. and Adabanija, Moruffdeen A. and Agboola, R.O. and Adagunodo, T. A. (2017) Effect of Open Dumpsite on Undeground Water in Ganmo,Ifelodun LGA, Kwara State, North Central Nigeria. In: NIGERIAN GEOPHYSICAL SOCIETY CONFERENCE.

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This study imbibes Geophysical survey involving electrical resistivity methods (Electrical Re- sistivity Tomography and Vertical Electrical Sounding), Physico-chemical analysis and Bacte- ria Analysis of the underground water samples. Geophysical survey were conducted around a 35 years old solid waste dumpsite in Ganmo, one of the districts in Ifelodun LGA, Kwara State, North Central Nigeria, located between latitude 8�2502500 to 8�2504100N and longitude 4�3603600 to 4�3606200E, with the view to assessing the extent of impact of the waste dumpsite on the quality of the groundwater in the study area. Electrical Resistivity Pro�ling and vertical elec- trical sounding stations were established using Werner and Schlumberger con�guration with half { currents electrode spacing that ranged from 1 to 100 m. A digital read out resistivity meter was used to acquire data in the area. A contaminant leachate plume was delineated in 2-D resistivity sections as low resistivity zones. The 2-D resistivity imaging was identi�ed as bluish zones of low resistivity 20.9 m with the depth ranging from 0.25 to 3.96 m in the entire inverse model sections. The low resistivity value of 20.9 m revealed that the groundwater around the dumpsite has been contaminated to the depth of 3.19 m compare to the measured water levels. The VES results were presented in terms of resistivity, thickness and depth. The VES interpreted results delineated three subsurface layers comprising topsoil, weathered layer and the fresh basement of which the three (3) layer geo-electric sections are both H-type and A-type sounding curve. The result indicated that the 3rd layer VES has high resistivity value ranging from 650.0 to 2264.3 m whose depth and thickness could not be reached. Three (3) water samples were collected, two samples from the closest hand dug wells and one sample from bore-hole for analysis. The hydro-physicochemical analysis conducted showed that wells are in good conditions actually the concentration of various parameters tested are below the WHO and FEPA standard. The result of the bacterial analysis of the water samples collected showed presence of bacterial species load of E. coli and Klebsiella which can cause severe health hazards. It is concluded that the water is not safe for domestic consumption. However water treatment is hereby recommended on all wells around the study area.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Leachate plume, resistivity, contaminants, health hazard, VES.
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 29 Jan 2018 10:29
Last Modified: 29 Jan 2018 10:29

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