Obafemi Awolowo University

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Browsing Obafemi Awolowo University by Subject "aquifer"

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    Water and sub-soil contamination in the coastal aquifers of Arogbo, Ondo State, Nigeria
    (2021) Awoyemi MO; Ajama OD; Adekola SA; Arogundade AB; Fashina CD; Akinlade GO; Oyekunle JA
    Study Region Arogbo Community, Ondo State, Nigeria. Study Focus In this study, groundwater and subsoil contamination within the coastal aquifers of Arogbo was investigated in order to determine the nature and sources of contamination, and its variation with season. In dry and wet seasons, water samples were analysed for their physico-chemical and bacteriological properties while soil samples were collected at depths of 0–0.5 and 0.5–1.0 m to determine the elemental concentration of heavy metals and their variation with depth. New Hydrological Insights for the Region The data obtained showed that the aquifer is shallow with a depth to water table ranging from 0.37 to 1.20 m. The hydro-chemical results revealed that the quality of water have been greatly impaired by the presence of contaminants such as Fe, Mn, and brackish water while the bacterial analysis showed that only few water samples were fit for human consumption. The results of soil analysis revealed the presence of anthropogenic contaminants such as Cd, Cu and Zn. This study concluded that the soil contaminants had no significant impact on the contamination level of water within the study area. Rather, terrestrial sources of iron and manganese were the major contaminants responsible for the high level of colouration of surface water and groundwater within the study area. These contaminants could pose serious health hazards to residents of the community.