The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Evaluation of Seawater Intrusion on Costal Groundwater using Systematic Analytical Method

계층적 분석방법을 이용한 해수침투 영향 평가

  • Kim, Chang-Hoon (Department of Civil Engineering, The University of Seoul) ;
  • Kim, Nam-Ju (GEO engineering Co., Ltd.) ;
  • Park, Youngyun (Department of Geology and Geophysics, Kangwon National University)
  • 김창훈 (서울시립대학교 토목공학과) ;
  • 김남주 ((주)지오엔지니어링) ;
  • 박영윤 (강원대학교 지질지구물리학부)
  • Received : 2016.10.19
  • Accepted : 2017.03.28
  • Published : 2017.03.31
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Abstract

Seawater intrusion was evaluated using electrical conductivity, chemical proxies, and oxygen isotopic compositions in coastal area. It seems that groundwater in the area where the electrical conductivity is over $3,000{\mu}S/cm$ is influenced by seawater. However, it is very difficult that seawater intrusion is distinguished from other contaminants using the electrical conductivity. The chemical proxies and oxygen and hydrogen isotopic compositions can quantitatively estimate seawater intrusion. However, these method is a costly disadvantage. Therefore, firstly, groundwater contamination by seawater intrusion was evaluated using electrical conductivity and then the additional chemical and isotopic analysis were conducted in areas where possibility of contamination by seawater intrusion is high. These systematic analytical method can reduce analytical cost to quantitatively evaluate influence of seawater intrusion on coastal groundwater and may improve efficiency of analytical method for seawater intrusion.

해안지역에서 지하수의 전기전도도, 화학적 지시자, 동위원소 조성을 이용하여 해수침투를 평가하였다. 전기전도도가 $3,000{\mu}S/cm$ 보다 높은 지역을 해수의 영향을 받은 지역으로 평가할 수는 있지만 다른 오염원과 해수침투를 구분하는 것이 매우 어렵다. 화학적 지시자 및 산소와 수소 동위원소 조성은 해수침투의 영향을 정량적으로 평가할 수 있지만 비용이 많이 드는 단점이 있다. 따라서 전기전도도를 이용하여 1차적으로 해수침투 가능성을 평가하고 해수침투의 영향을 받은 것으로 분류된 지역에 대해서 추가적인 화학 및 동위원소 분석을 수행함으로써 해수침투의 영향 정량적으로 평가하는데 소요되는 비용을 줄일 수 있으며 이러한 분석방법을 통해 해수침투 평가방법의 효율성을 향상시킬 수 있다.

Keywords

References

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