Geophysical and physicochemical characterization of organic waste contamination of hydrolithofacies in the coastal dumpsite of Akwa Ibom State, southern Nigeria

Abstract

Geophysical and physicochemical methods were carried out to examine the effect of leachate on groundwater in a dumpsite location in Akwa Ibom State, Nigeria. This was done to ascertain the level of organic contamination in the wells located in the study area. The analysis of water samples from boreholes close to the dumpsite was done to constrain the interpretation of electrical resistivity data on the reality of the effect imposed by dumpsite leachate on the hydrolithofacies. The resistivity values of the underlying layers were observed to be lower than the overlying layer, an effect which may be associated with the infiltration of leachate into the underlying layers. The geohydrolayer resistivities range from 78.4 to 1,669.8 Ωm. The contour maps generated display the variations of the parameters. The elevation contour map indicates the flow of groundwater in a southwest–northeast direction which also depicts the direction of leachate flow. The physicochemical water samples show differences in concentrations of the physicochemical parameters. The concentrations of the ions in the water samples measured are compared with the WHO standard for drinking water. The sodium absorption ratio and sodium percentage show that the groundwater within the dumpsite has no negative effect on the subsurface.

Geohydraulic study of aquifer characteristics in parts of Enugu North Local Government Area of Enugu State using electrical resistivity soundings

“…The quality of groundwater is greatly affected by the amount of contaminants that percolate into the aquifer units through the overlying layers (Obiora et al 2015;Ibuot et al 2017). The movement of groundwater pollutants is controlled by the geohydraulic characteristics of the subsurface, which greatly affects the flow dynamics of the aquifer units.…”

Vulnerability assessment of hydrogeologic units in parts of Enugu North, Southeastern Nigeria, using integrated electrical resistivity methods

“…Researchers have employed the electrical resistivity method in characterizing groundwater problems related to aquifer potentiality to yield water (4) , (16) , (19)(20)(21)(22)(23)(24) and contamination by delineating vulnerable zones, migration and the extent of contamination (11) , (4,(25)(26)(27)(28)(29)(30)(31)(32)(33)(34) . AVI has also been employed to quantify the aquifer vulnerability of an area and has been proven to be simple, faster and is widely used by researchers (35)(36)(37) .…”

Integrated Geophysical and Hydrogeochemical Characterization and Assessment of Groundwater Studies in Adum West Area of Benue State,Nigeria

“…This is based on the fact that such properties have great influence on aquifer repositories. [27][28][29][30][31] stated that the heterogeneous nature of the subsurface rocks varies widely depending on the local geology of the area. With all the aforementioned factors that play a role in groundwater pollution and aquifer vulnerability it is therefore necessary to constantly monitor groundwater within the study area.…”