The outcomes of the study are offered as geo-sections and also maps. The geo-sections enabled the recognition of the various lithological units within the research study location. The maps were utilized to figure out the variant of deepness of air pollution and top quality of water across the areas of examination - Borehole Drilling Contractors. The geophysical borehole logging data gotten showed that there is enormous saline water incursion into freshwater aquifers affecting the potability of water in the leading aquifer.
The outcome of the information concurs with the analysis of Adeoti et al. (2010) that executed a detailed service Oniru component of Lekki axis making use of integrated geophysical survey techniques; electric resistivity, self-potential as well as caused polarization to check deep sea intrusion right into freshwater aquifers. Lithologic plots in Figs - Borehole Drilling. 4, 5, 6, 7 and 8 are modeled from the data acquired from the lithology and resistivity logs.
4, there is an observable progressive boost in the saline water incursion in the southern direction across VIBH1VIBH4 towards the receding coast. Figure 5 likewise shows similar pattern across VIBH5VIBH7, however with a distinction at VIBH8. This may be because of the truth that the locations around VIBH8 are much less booming in contrast with other locations around VIBH1 to VIBH7.
2010). This assertion is strengthened by the results gotten from the works of Gyopari (2005) in the highly inhabited areas in Manawatu, New Zealand. It was wrapped up that the largely populated locations are primarily at threat of contamination from saline breach due to the high volume of groundwater abstractions. Consequently, the resistivity data obtained give a basis for future surveillance of the saline water/freshwater user interface.
Nevertheless, areas around VIBH8 are much more susceptible to contamination of saline water than regions around VIBH1 to VIBH7 since there is no protective layer such as clay or clayey sand/sandy clay to stop contamination of the freshwater aquifers in the area. According to Ayolabi et al. (2013), the boreholes having thick clay devices are discovered to be much less prone to air pollution from saltwater and garbage disposal at the school of the College of Lagos.
The density of the freshwater sand at deepness of 156 m and also above arrays from 7 to 32 m making it ideal for groundwater abstraction. Number 6 programs that the deepness of contamination is raising in the eastern instructions throughout LBH1 to LBH4. Water Well Drilling Contractors. The presence of clay, clayey sand/sandy clay working as safety systems for the freshwater sand is noticeably present in these areas with a progressive increase also in the eastern instructions.
This is in accordance with the reduction of Phongpiyah and also Helmut (2012), where they suggested that thick clay systems overlaping freshwater sand in Southern Thailand avoid the immediate contamination of the freshwater sand by saltwater. Number 7 additionally reveals that the deepness of contamination is practically the same across LBH2, LBH12 and also LBH8.
For that reason, borehole deepness of 230 m or more should be pierced in areas around LBH2 and LBH12 to stop the threat of the productive freshwater sand aquifers being contaminated with saline water. Similarly in Fig. 8, the depth of pollution is nearly consistent throughout LBH3, LBH12 as well as LBH9. The long life of the boreholes around relies majorly on the visibility of a very thick clay device acting as a safety layer between the uncontaminated as well as contaminated zone as observed in LBH9.