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2025 Vol.30, Issue 3 Preview Page
Evaluation of the Impact of Seawater Intrusion on Coastal Aquifers with Climate Change in S. Korea

기후변화에 따른 우리나라 해안 대수층의 해수침투 영향 평가

Sung-Ho Song1*
,
Ga-Young Hwang1
,
Hwan-Ho Yong1
,
Byungsun Lee1
송 성호1*
,
황 가영1
,
용 환호1
,
이 병선1
1Rural Research Institute, Korea Rural Community Corporation
1한국농어촌공사 농어촌연구원
*Corresponding Author
30 June 2025. pp. 54-70
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Abstract

Sea level rise due to climate change increases the risk of seawater intrusion through coastal aquifers in Korea. In the view point of topographic characteristics, the slope of the west coast is gentle, while the slope of the east coast is very steep. Therefore, as the groundwater level gradient decreases away from the coastline, the interface between seawater and freshwater expands, which causes seawater intrusion. In this study, the impact of sea level rise on seawater intrusion through coastal aquifers was evaluated spatiotemporally using seawater intrusion monitoring network (SIMN). The results showed that the groundwater level change of the aquifer on the east coast is relatively more affected by groundwater recharge than by sea level rise, and that the recharge effect is more persistent than in the past. On the other hand, the annual variation of groundwater level on the west coast decreases as it moves away from the coastline, indicating that sea level rise has a significant impact on the aquifer. After comprehensively reviewing these results with the groundwater quality analysis and the survey results of representative watersheds, it is determined that the aquifer on the west coast of Korea is more vulnerable to seawater intrusion than on the east coast.

Keywords
Sea level rise
Seawater intrusion
Coastal aquifer
Groundwater level
Groundwater quality
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 30
  • No :3
  • Pages :54-70
  • Received Date : 2025-04-28
  • Revised Date : 2025-05-08
  • Accepted Date : 2025-06-16
  • DOI :https://doi.org/10.7857/JSGE.2025.30.3.054
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