A Numerical Approach to Evaluating Groundwater Vulnerability to Seawater Intrusion on Jeju Volcanic Island, South Korea

Groundwater vulnerability to seawater intrusion (SWI) on Jeju Volcanic Island, South Korea, varies significantly by region, with the eastern and northern areas showing the highest risk. This finding stems from a novel numerical approach that parametrized five factors—hydraulic conductivity, groundwater level, distance from shoreline to wells, well depth, and groundwater use—and correlated them with groundwater electrical conductivity as an indicator of salinization. The study identified groundwater use, well depth, and groundwater level as the most significant parameters influencing SWI vulnerability. Using spatial analyses and ratings, it developed a numerical model that classified vulnerability into weak, moderate, and high categories, providing actionable insights for targeted preventive measures. Regional differences in land-use, industrial activities, population density, and urbanization further emphasized the need for tailored strategies to mitigate SWI risks.

Lee, D., Park, J., Lee, H. A., & Woo, N. C. (2023). A Numerical Approach to Evaluating Groundwater Vulnerability to Seawater Intrusion on Jeju Volcanic Island, South Korea. Sustainability, 15(4), 3081. https://doi.org/10.3390/su15043081