• 한국해양환경ㆍ에너지학회지
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• 제4권2호
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• pp.15-24
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• 2001

Huang 등[1996]이 제안한 해양방류 혼합구역에 대한 분석방법을 활용하여 마산만 해양방류 해역의 혼합구역에서 주변해수의 흐름과 밀도성층의 변화에 따른 혼합 희석에 의한 수중방류하수의 농도변화분포를 산정하였다. 방류해역에서 5월 중순부터 8월 중순까지 3개월 동안 연속 관측된 조류의 매 시간별 유향과 유속변화에 따른 혼합구역에서의 하수농도분포를 계산하고, 마산만 해수유동에 있어 가장 큰 요소인 조류의 변화를 고려하여 15일 간격으로 방류하수의 평균된 농도분포를 구하였다. 이 결과에 의하면 조류의 유속이 상대적으로 강했던 기간동안에는 혼합구역에서의 평균농도는 매우 낮았고, 유속이 약했던 기간에는 낮은 희석률로 인해 평균농도가 매우 높게 나타났다. 그리고 관측된 조류의 주 방향으로 인해 혼합구역이 방류해역의 서측 해안까지 확장됨을 나타내었으며, 이는 방류해역에서 조사된 퇴적물의 오염도 분포결과와도 잘 일치되었다.

• 한국수산과학회지
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• 제55권6호
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• pp.954-959
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• 2022

Marine outfalls are used to discharge treated liquid effluents to the environment. An efficiently designed, constructed and operated marine outfall effectively dilutes the discharged effluent, thereby reducing the risk to biota and humans dependent upon the marine environment. In this study, we investigated the effluent transport from a marine outfall at different depths in Masan Bay. A particle-tracking model was used to predict the dispersion of effluent. The model results indicate that some particles released from a depth of 13 m move to the inner area of Masan Bay within 48 h. As the release depth increases after 48 h, the particles move further southward. This suggests that effluent from the outer area of Masan Bay can affect the inner area, and that this effect can be reduced by increasing the depth of effluent release.

• Ocean and Polar Research
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• 제22권2호
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• pp.69-80
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• 2000

A 3-D particle tracking model with normalized characteristic equations has been developed to predict the variation of near-field mixing characteristics and the far-field transport of the effluent plumes discharged from sea outfalls. The model was applied to the case study on the Masan sea outfall plumes discharged through a submerged multiport-diffuser. Numerical simulations of the effluent transport for 15 days which cover neap and spring tidal cycles in Masan Bay were conducted using fall velocities of the solid wastes and the initial plume characteristics obtained from normalized near-field characteristic equations. The results showed that time variations in near-field minimum dilutions with tidal ambient flow conditions are about $45{\sim}49$. Most of the heavy particles in the effluent plumes were settled and deposited in the vicinity of the outfalls immediately, and the finer particles were transported eastwards 3 km away from the outfalls for 15 days. A similar depositional trend of contaminated sediment was also found during a recent field survey.