한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제46권7호
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  • Pages.783-794
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  • 2013
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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제주도 성산유역의 담수와 염수 지하수 개발의 영향

Impacts of Fresh and Saline Groundwater Development in Sungsan Watershed, Jeju Island

  • 박남식 (동아대학교 토목공학과) ;
  • 고병련 (제주국제대학교 토목공학과) ;
  • 임영덕 (한국전력공사 개발본부 송변전개발처)
  • 투고 : 2013.02.09
  • 심사 : 2013.05.06
  • 발행 : 2013.07.31
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초록

지하수 의존도가 높은 제주도에서는 담수 지하수는 물론 어류의 육상 양식을 위한 염분이 높은 지하수도 활발하게 개발되고 있다. 본 연구는 제주도 성산유역을 대상으로 담수와 염수 지하수 개발이 지하수계에 미치는 영향을 분석하였다. 경계면 모델을 이용하여 담수와 염수의 흐름을 모의하고 담수와 염수 개발의 영향을 조사하였다. 담수 개발은 기존의 연구 결과에서 익히 알려진 바와 같이 지하수위 강하와 해수쐐기 침투를 야기하는 것으로 나타났다. 염지하수 개발은 지하수위를 강하시키는 부정적 영향과 함께 해수침투를 저감시키는 긍정적 효과도 있는 것으로 나타났다. 담-염수사이의 유한한 두께의 천이대에 대한 수정 Ghyben-Herzberg 비율을 유도하고 해수침투 관측정에서 관측된 자료와 비교하였다.

Saline groundwater, in addition to fresh groundwater, is actively developed for inland aqua culture in Jeju Island where groundwater is practically the only source of freshwater. In this work we analyzed impacts of saline and fresh groundwater development on groundwater systems in Sungsan subwatershed in Jeju. A sharp-interface model was used to simulate fresh and saline groundwater flows. Withdrawal of freshwater imparted adverse impacts by lowering groundwater level and inducing saltwater encroachment. Withdrawal of saline water imparted mixed results: on one hand it lowered groundwater level, on the other hand it reduced saltwater encroachments. However, freshwater development lowered groundwater level much more than salinewater development did. Modified Ghyben-Herzberg ratio was developed for a transition zone with finite width. Comparison against observed data resulted in fair agreement.

키워드

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피인용 문헌

  1. A comprehensive sharp-interface simulation-optimization model for fresh and saline groundwater management in coastal areas vol.23, pp.6, 2015, https://doi.org/10.1007/s10040-015-1268-8
  2. Analysis of Water Level Fluctuations according to Groundwater Development and Pumping Duration vol.25, pp.1, 2016, https://doi.org/10.5322/JESI.2016.25.1.135
  3. Analysis of Spatiotemporal Changes in Groundwater Recharge and Baseflow using SWAT and BFlow Models vol.30, pp.5, 2014, https://doi.org/10.15681/KSWE.2014.30.5.549
  4. Sharp Interface Approach for Regional and Well Scale Modeling of Small Island Freshwater Lens: Tongatapu Island vol.10, pp.11, 2018, https://doi.org/10.3390/w10111636