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2021 Vol.26, Issue 6 Preview Page
Hydrogeological Characterization of Groundwater and Surface Water Interactions in Fresh-Saline Water Mixed Zone of the East Coast Lagoon Area, Korea

동해안 석호 담염수 혼합대에서 지하수와 지표수 상호작용의 수리지질학적 특성 평가

Woo-Hyun Jeon1
,
Dong-Hun Kim1
,
Soo-Hyoung Lee1
,
Seho Hwang1
,
Hee Sun Moon1*
,
Yongcheol Kim1
전우현 1
,
김동훈 1
,
이수형 1
,
황세호 1
,
문희선 1*
,
김용철 1
1 Groundwater Research Center, Geological Environment Research Division, Korea Institute of Geoscience and Mineral Resources
1 한국지질자원연구원 지질환경연구본부 지하수연구센터
*Corresponding Author
31 December 2021. pp. 144-156
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Abstract

This study examined hydrogeological characteristics of groundwater and surface water interaction in the fresh-saline water mixed zone of East Coast lagoon area, Korea, using several technical approaches including hydrological, lithological, and isotopic methods. In addition, the fresh-saline water interface was evaluated using vertical electrical conductivity (EC) data. For this purpose, three monitoring wells (SJ-P1, SJ-P2, and SJ-P3) were installed across the Songji lagoon at depths of 7.4 to 9.0 m, and water level, EC, and temperature at the wells and in the lagoon (SJ-L1) were monitored using automatic transducers from August 1 to October 21, 2021. Isotopic composition of the groundwater, lagoon water, and sea water were also monitored in the mid-September, 2013. The mixing ratios calculated from oxygen and hydrogen isotopic composition decreased with increasing depth in the monitoring wells, indicating saline water intrusion. In the study area, the interaction of groundwater-surface water-sea water was evident, and residual salinity in the sedimentary layers created in the past marine environment showed disorderly characteristics. Moreover, the horizontal flow at the lagoon's edge was more dominant than the vertical flow.

Keywords
Groundwater and surface interaction
Electrical conductivity
Stable isotopes
Songji lagoon
Seawater intrusion
Groundwater-dependent ecosystems
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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 : 26
  • No :6
  • Pages :144-156
  • Received Date : 2021-12-03
  • Revised Date : 2021-12-06
  • Accepted Date : 2021-12-14
  • DOI :https://doi.org/10.7857/JSGE.2021.26.6.144
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