동해안화진포석호주변대수층내담수-염수경계면분석에관한연구

Translated title of the contribution: A Study on Analysis of Freshwater-saltwater Interface in the Aquifer around Hwajinpo Lagoon on the Eastern Coast of Korea

Minji Kim, Dongjin Kim, Seong Chun Jun, Jeonghoon Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Hwajinpo Lagoon, located on the eastern coast of Korea, is a unique environment where freshwater and saltwater are mixed. Systematic management of the lagoon is required because it is a biodiversity-rich and area of high conservation value. The existing environment of the lagoon was evaluated by identifying the distribution of the groundwater level and groundwater flow characteristics. In addition, hydrogeochemical fluctuations were analyzed to determine the effect of seawater intrusion into the aquifer. The results demonstrate that the freshwater-saltwater interface is distributed throughout the aquifer and rises when water of the lagoon evaporates due to prolonged periods of low rainfall and high temperature, thereby increasing the possibility of seawater inflow through groundwater. As for the ionic delta properties (difference between the measured and theoretical concentration of mixed waters), it was estimated that the cation-exchange and precipitation reactions occurred in the aquifer due to seawater intrusion. The ratio of seawater mixed at each point was calculated, using oxygen isotopes and chloride as tracers, resulting in an average of 0.3 and a maximum of 0.87. The overall seawater mixing ratio appears to be distributed according to the distance from the coast. However, some of the results were deviated from the theoretical expectations and reflected the characteristics of the nearby aquifers. Further research on seasonal changes and simulation of seawater intrusion mechanisms is required for specific analysis.

Translated title of the contributionA Study on Analysis of Freshwater-saltwater Interface in the Aquifer around Hwajinpo Lagoon on the Eastern Coast of Korea
Original languageUndefined/Unknown
Pages (from-to)699-707
Number of pages9
JournalEconomic and Environmental Geology
Volume54
Issue number6
DOIs
StatePublished - Dec 2021

Bibliographical note

Publisher Copyright:
© 2021 Korean Society of Economic and Environmental Geology. All rights reserved.

Keywords

  • Freshwater-saltwater interface
  • Lagoon
  • Seawater intrusion

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