Impacts of a Dumpsite on the Neibourhood of a Part of Southwestern, Nigeria

The possibility of environmental pollution especially ground water in and around Iwepe, Imodi-Mosan Road; Ago-Iwoye due to contaminant potential of leachate from Ago- Iwoye township waste disposal/dump site was investigated. The rate of transport of the contaminants from the dumpsite within the subsurface was investigated using Schlumberger and Wenner Electric resistivity methods of geophysical survey. Electric current was passed into the ground through two current electrodes, while the potential gradient (voltage) was measured across another pair of electrodes (potentials electrodes) the apparent resistivity of the subsurface was calculated from the measured resistance. The results were interpreted using a computer iteration called WING LINK to curve-march and filter the data and RESIST to remove noise in order to obtain interpreted resistivity, this showed vertical variation in resistivity value and number of layers at a particular point. The high and low resistivity zones, delineated from the cross-sectional map of the site revealed that the concentration of the contaminants was restricted to a particular zone and the leachate flowed towards the Eastern direction of the dump site area.