• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2000년도 춘계수산관련학회 공동학술대회발표요지집
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• pp.363-365
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• 2000

The cumacean fauna currently contains more than 1200 species worldwide (Wafting, 1997). Many of the habitats where cumaceans are likely to be found, such as estuaries, shallow embayments, beaches, tidal flats, and the inner continental shelf, have not yet had their cumacean fauna documented (Watling, 1997). (omitted)

• 한국농공학회지
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• 제36권1호
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• pp.128-140
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• 1994

Coastal areas, especially embayments are apt to be polluted easily and many embayments in Korea are already suffering from pollution problems. To manage such pollution, it is strongly needed to develop technique to trace movements of pollution. Such technique cove- ring the embayment affected by the tidal influence, should take account both of the convection and the diffusion motions which cause lots of problems in numerical calculation. In this study, a Eulerian-Lagrangian Analysis(ELA) model was applied to Young Il bay and tested for its applicablity, which was developed by using the Eulerian-Lagrangian Method that reduce the numerical disperison and oscillation by way of solving convection and diffusion terrns separately. Concentration of Chemical Oxygen Demand(COD) and Suspend Solid(SS) of the embay- ment area were estimated by the model and compared with the observed values and the sound results were obtained. At the same time the diffsion coefficient and decay coefficient for Chemical Oxygen Demand in the Young II Bay were found as Dx = Dy = 20m$^2$/sec, kd=2.5 ${\times}$ 10-5/sec respectively, and for Suspend Solid, Dx =Dy = 30m$^2$/sec, kd=5.0${\times}$ 10-5/sec

• 한국물환경학회지
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• 제26권1호
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• pp.111-115
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• 2010

Beaches in estuaries, bays, and harbors are frequently contaminated with indicators of human pathogens such as fecal indicator bacteria. Tracking down the sources of contamination at these enclosed beaches is complicated by the many point and non-point sources that could potentially degrade water quality along the shore. A mathematical framework was developed to test quantitative relationships between fecal indicator bacteria concentration in ankle depth water at enclosed beaches, the loading rate of fecal indicator bacteria from non-point sources located along the shore, physical characteristics of the beach that affect the transport of fecal indicator bacteria across the beach boundary layer, and a background concentration of fecal indicator bacteria attributable to point sources of fecal pollution that impact water quality over a large region of the embayment. Field measurements of fecal indicator bacteria concentrations and water turbulence at an enclosed beach were generally consistent with predictions and assumptions of the mathematical model, and demonstrated its utility for assessing waste load of non-point sources, such as runoff, bather shedding, bird droppings, and tidal washing of contaminated sediments.

• 한국수산과학회지
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• 제28권1호
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• pp.67-79
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• 1995

1990년 11월에서 1993년 8월 사이 아산만에서 소형 otter trawl을 이용하여 계절별로 저어류를 채집하여 시간에 따른 종조성의 변화를 분석하였다. 조사 기간동안 49종의 어류가 출현하였으며, 그 가운데 참서대(Cynoglossus joyneri), 곤어리 (Thrissa koreana)와 민태(Johnius belengerii)가 우점하여, 전 채집 개체수의 $84.7\%$, 전채집량의 $70.5\%$를 차지하였다 출현종수는 뚜렸한 계절변화를 보이지 않았으나, 개체수와 생체량은 봄에서 가을 사이의 난수기에 높고 겨울에는 낮은 값을 보였다. 각 계절 채집된 어류의 순위를 이용하여 주성 분분석한 결과, 정점간의 차이는 적었으나 계절에 따른 경향을 나타내어 조사 해역 저어류의 종조성은 수온이나 혹은 수온과 비슷한 경향을 보이는 요인에 의하여 결정되는 것으로 보인다. 아산만 저어류는 한반도 주변 다른 내만역에 비하여 출현종수 및 생물량이 적었으며, 이것은 조류에 의한 해수 혼합이 활발하여 서식처인 해저퇴적물이 불안정한데 기인된 것으로 판단된다. 출현종수는 해에 따라 유의한 감소 경향을 보였으며, 감소하는 종은 출현빈도가 낮고 채집량도 적은 종들로 구성되어 있었다. 이 종들은 환경의 내구범위 한계에 서식하여 왔으나, 최근의 인위적 환경 변화로 인하여 내구범위를 벗어나 더 이상 만 내에서 살 수 없게 된 것으로 추정된다.