An Assessment of Saltwater Intrusion in Coastal Regions of Lagos, Nigeria  

作　　者：Obunadike Callistus Akerele D. Daniel Abiodun O. Pelumi Olisah Somtobe Oloyede Kunle Obunadike S. Echezona Obunadike J. Chinenye Obunadike Callistus;Akerele D. Daniel;Abiodun O. Pelumi;Olisah Somtobe;Oloyede Kunle;Obunadike S. Echezona;Obunadike J. Chinenye(Department of Geosciences, Freiberg University of Mining and Technology, Freiberg, Germany;Department of Construction Management, University of Washington, Seattle, USA;Department of Civil Engineering, Morgen State University, Baltimore, USA;Department of Geography, University of Lagos, Lagos, Nigeria;Department of Biochemistry, Anambra State University, Uli, Nigeria;Department of Geology, Anambra State University, Uli, Nigeria)

机构地区：[1]Department of Geosciences, Freiberg University of Mining and Technology, Freiberg, Germany [2]Department of Construction Management, University of Washington, Seattle, USA [3]Department of Civil Engineering, Morgen State University, Baltimore, USA [4]Department of Geography, University of Lagos, Lagos, Nigeria [5]Department of Biochemistry, Anambra State University, Uli, Nigeria [6]Department of Geology, Anambra State University, Uli, Nigeria

出　　处：《Journal of Geoscience and Environment Protection》2024年第1期93-119,共27页地球科学和环境保护期刊（英文）

摘　　要：This paper explains various factors that contribute to saltwater intrusion, including overexploitation of freshwater resources and climate change as well as the different techniques essential for effective saltwater intrusion management. The impact of saltwater intrusion along coastal regions and its impact on the environment, hydrogeology and groundwater contamination. It suggests potential solutions to mitigate the impact of saltwater intrusion, including effective water management and techniques for managing SWI. The application of A.I (assessment index) serves as a guideline to correctly identify wells with SWI ranging from no intrusion, slight intrusion and strong intrusion. The challenges of saltwater intrusion in Lagos and the salinization of wells were investigated using the hydro-chemical parameters. The study identifies four wells (“AA”, “CMS”, “OBA” and “VIL”) as having high electric conductivities, indicating saline water intrusion, while other wells (“EBM”, “IKJ, and “IKO”) with lower electric conductivities, indicate little or no salt-water intrusion, and “AJ” well shows slight intrusion. The elevation of the wells also played a vital role in the SWI across coastal regions of Lagos. The study recommends continuous monitoring of coastal wells to help sustain and reduce saline intrusion. The findings of the study are important for policymakers, researchers, and practitioners who are interested in addressing the challenges of saltwater intrusion along coastal regions. We assessed the SWI across the eight (8) wells using the Assessment Index to identify wells with SWI. Wells in “CMS” and “VIL” has strong intrusions. A proposed classification system based on specific ion ratios categorizes water quality from good (+) to highly (-) contaminated (refer to Table 4). These findings underscore the need for attention and effective management strategies to address groundwater unsuitability for various purposes.This paper explains various factors that contribute to saltwater intrusion, including overexploitation of freshwater resources and climate change as well as the different techniques essential for effective saltwater intrusion management. The impact of saltwater intrusion along coastal regions and its impact on the environment, hydrogeology and groundwater contamination. It suggests potential solutions to mitigate the impact of saltwater intrusion, including effective water management and techniques for managing SWI. The application of A.I (assessment index) serves as a guideline to correctly identify wells with SWI ranging from no intrusion, slight intrusion and strong intrusion. The challenges of saltwater intrusion in Lagos and the salinization of wells were investigated using the hydro-chemical parameters. The study identifies four wells (“AA”, “CMS”, “OBA” and “VIL”) as having high electric conductivities, indicating saline water intrusion, while other wells (“EBM”, “IKJ, and “IKO”) with lower electric conductivities, indicate little or no salt-water intrusion, and “AJ” well shows slight intrusion. The elevation of the wells also played a vital role in the SWI across coastal regions of Lagos. The study recommends continuous monitoring of coastal wells to help sustain and reduce saline intrusion. The findings of the study are important for policymakers, researchers, and practitioners who are interested in addressing the challenges of saltwater intrusion along coastal regions. We assessed the SWI across the eight (8) wells using the Assessment Index to identify wells with SWI. Wells in “CMS” and “VIL” has strong intrusions. A proposed classification system based on specific ion ratios categorizes water quality from good (+) to highly (-) contaminated (refer to Table 4). These findings underscore the need for attention and effective management strategies to address groundwater unsuitability for various purposes.

关 键 词：Hydro-Chemical Data Analysis Saline Incursion Aquifer Sustainability and Management Coastal Regions Ground Water Intrusion 

分 类 号：P64[天文地球—地质矿产勘探]