한국해안·해양공학회논문집 (Journal of Korean Society of Coastal and Ocean Engineers)

  • 제24권4호
  • /
  • Pages.269-276
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  • 2012
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  • 1976-8192(pISSN)
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  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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한강하구 염하수로 주변의 조석변화에 따른 염분분포와 담수와의 상관관계

Relation of Freshwater Discharge and Salinity Distribution on Tidal Variation around the Yeomha Channel, Han River Estuary

  • Yoon, Byung-Il (Department of Oceanography, College of Natural Science, Inha University) ;
  • Woo, Seung-Buhm (Department of Oceanography, College of Natural Science, Inha University)
  • 투고 : 2012.07.18
  • 심사 : 2012.08.14
  • 발행 : 2012.08.31
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초록

하구 및 감조 하천의 염분분포는 조석, 담수, 바람 그리고 지형적 효과와 같은 다양한 외력의 작용과 시스템의 결합에 의해서 독특한 특성을 보인다. 연안 및 하구지역에서 염분구조의 특성을 이해하는 것은 해양학적, 수질 생태학적 그리고 공학적 문제를 접근할 때 반드시 필요하다. 2007년 5월부터 6월까지 약 50일 동안 한강하구 염하수로의 남쪽과 북쪽입구 부근에서 수로방향의 염분분포를 파악하기 위해서 표층 염분을 관측하였다. 장기간의 염분 관측자료를 분석한 결과 장 단기적인 조석 변동과 담수에 따라서 염분의 변화가 뚜렷하게 나타났다. 담수유입량의 계절적 변화에 따른 염하수로의 주축방향 염분분포의 특성을 국립수산과학원의 국가해양관측망 자료를 분석하여 제시하였다. 담수유입량과 염분분포의 관계를 비선형 회귀식을 사용하여 제시하였고, 조석과 담수유입량 그리고 지형적 영향을 고려한 염분침입 거리의 경험식을 제시하였다. 지형학적 영향까지 고려한 염분침입 거리의 경험식과 기존 문헌자료의 염분분포를 비교할 때 연구지역의 염분분포는 조석, 담수의 영향과 함께 지형적 영향에 의해서도 염수침입 한계 지점 및 염분분포의 구조적 특성이 변한다.

Salinity distribution in estuary and tidal river is presented by many parameters including tidal forcing, river discharge and geographical effect. Understanding the characteristics of salinity structure is very important in the aspect of water-quality, ecological, and engineering viewpoint. Field measurement was carried out to study the distribution of salinity structure at 2 surface stations at Yeomha channel in the Han River estuary. The results of short- and long-term salinity change according to short and long tidal variability is investigated. For analyzing the axial salinity distribution at Yeomha channel, the salinity data from NFRDI is used in this study. The relationship between freshwater discharge and salinity distribution is represented through the nonlinear regression equation. The empirical equation for salt intrusion length scale, including tide, river discharge, and topographical effect is presented. As the comparison of empirical equation and existing data collected in study area, the characteristic of salt intrusion length and salinity distribution is changed by tide, fresh water, and geographical effect.

키워드

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피인용 문헌

  1. Evaluation of ADCP backscatter inversion to suspended sediment concentration in estuarine environments vol.51, pp.1, 2016, https://doi.org/10.1007/s12601-016-0010-3
  2. The Regional Classification of Tidal Regime using Characteristics of Astronomical Tides, Overtides and Compound Tides in the Han River Estuary, Gyeonggi Bay vol.27, pp.3, 2015, https://doi.org/10.9765/KSCOE.2015.27.3.149