Evaluation of seawater intrusion on the groundwater data obtained from the monitoring network in Korea

Abstract

Over-exploitation of groundwater induced seawater intrusion throughout coastal plains of Korea. To protect groundwater resources from the seawater intrusion hazards, a monitoring programme was undertaken. Groundwater data obtained from 45 seawater intrusion monitoring wells were evaluated in this study. The groundwater levels were mainly affected by pumping for agricultural irrigation and tidal fluctuations. Decreases in water levels accompanied increases in electrical conductivities. Vertical profile of electrical conductivity indicated progressive seawater encroachment. A detailed investigation and mitigation measure should be undertaken for the areas where electrical conductivities are continuously increasing.

Keywords:

• seawater intrusion
• groundwater development
• coastal areas
• electrical conductivity
• Korea

Acknowledgements

This research was supported by a grant (code 3-3-2) from Sustainable Water Resources Research Center of 21st Century Frontier Research Program.