GEOELECTRIC DELINEATION OF SUBSURFACE LEACHATE CONTAMINANT CONTROLLED CONDUCTIVE GROUNDWATER IN LAGOS STATE | Asian Journal of Advances in Research
The amount of water percolating through the refuse dumpsite in Igando, Lagos state, determines the volume of leachate generated, and this has posed a threat to groundwater obtained at various locations in the city. Due to the percolation of contaminant leachate released by the landfill into the groundwater aquifer, an ineffective waste disposal system has resulted in health hazards such as periodic epidemics and communicable diseases. In mapping areas of polluted soil and groundwater quality, 2D electrical resistivity imaging and vertical electrical sounding (VES) can be useful. The 2D resistivity structures and sounding interpretation showed three subsurface layers: topsoil, sand clay (brackish water), and sandstone (good quality fresh water). The shallow occurrence, as well as the thin porous overburden units overlying the layers, the sandstone areas, and the resistivity structures, were found to be the study area's main aquifer units. The mapped area that contained sand layers was also discovered to be a water-bearing formation that had been contaminated, rendering the groundwater around the landfill conductive. The findings have showed that landfill leachate has a low effect on groundwater, which can be due to the current clay subsoil at the dumpsite, which is thought to have a major impact on natural water percolation of Leachate into the groundwater. Please see the link :- https://mbimph.com/index.php/AJOAIR/article/view/1886