• 한국수산과학회지
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• 제45권5호
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• pp.486-492
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• 2012

In the late 1970s, the National Fisheries Research & Development Institute (NFRDI) started cetacean research to submit the Korean whale catch record to the International Whaling Commission. This continued until the moratorium on commercial whaling in 1986. The NFRDI resumed cetacean research with a pilot whale sighting survey in 1999. Subsequently, the NFRDI has conducted 53 cetacean sighting surveys within the Korean exclusive economic zone between 2000 and 2010. The surveys took a total of 760 days and cruising for 23,866 nautical miles. The finless porpoise Neophocaena asiaeorientalis was sighted most frequently (735 times), followed by the minke whale Balaenoptera acutorostrata (396 times), the long-beaked common dolphin Delphinus capensis (102 times), and the Pacific white-sided dolphin Lagenorhynchus obliquidens (27 times). Minke whales were distributed in the Yellow Sea and coastal area of the East Sea from spring to fall. Pacific white-sided dolphin sightings were restricted to the middle and upper coastal areas of the East Sea in summer. Common dolphins were sighted from east of the southern coast to the eastern coast of the Korean Peninsula from spring to fall. Finless porpoise occurred in all Korean coastal areas, except the middle and upper eastern coast.

• 한국수산과학회지
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• 제27권3호
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• pp.299-305
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• 1994

1991년과 1992년의 $3{\sim}4$월에 한국 남해안에서 어난을 채집하여 멸치와 정어리 난 분포역의 변동을 비교하고 발생 단계별 분포밀도로써 감소율을 추정하였다. 멸치와 정어리 난은 1991년 3월과 1992년 3월말${\sim}4$월초에 대마도 남서해역에서 동시에 높은 밀도로 분포하였다. 특히 1992년에는 1991년에 비하여 멸치와 정어리난 분포범위가 남해중부 외해역까지 확장되어 있었다. 조사해역의 표층수온은 $8.6{\sim}17.8^{\circ}C$였으며, 멸치와 정어리 난의 대부분은 $14{\sim}15^{\circ}C$에서 출현하였다. 1991년 3월 $4{\sim}15$일에 있어서 난의 발생단계별 분포밀도로부터 추정된 순간감소계수를 비교하면 멸치는 0.268/일, 정어리는 0.132/일로서 정어리 난 난의 1일 감소율이 멸치에 비하여 낮은 경향을 보였다.

• 한국환경과학회지
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• 제23권12호
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• pp.1977-1985
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• 2014

Many countries around the world are amplifying interest and studies on irrigation, flood control and environment with concern on serious water problems. Especially for irrigation in water supply vulnerable areas such as coastal areas - islands, business on underwater resource security facilities are promoted to secure stable water resources due to development of society and increase of life quality. Also, various policies such as reuse of leaking underwater, utilization of underwater at waterfront, and artificial recharge, etc are planned and designed. In order to develop small sized underwater resource secure technology, verification of seawater-freshwater interface is executed and how the balance between these will develop is a great interest of coastal areas - islands. In this study, seawater-freshwater interface behavior analysis experiment was conducted while reflecting properties of coastal areas - islands and executed hydraulic similitude of saltwater intrusion form control technology on abstraction.

• Journal of the korean society of oceanography
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• 제34권2호
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• pp.86-94
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• 1999

An investigation was conducted to determine limiting nutrients in the bay systems of the southern coastal area of Korea. The elemental composition of C, N, and P in suspended particulate matter was monitored nearly monthly in Chinhae and Koje Bays and seasonally in Deukryang Bay for 2 years. Atomic C:N ratio in particulate matter ranges from 4.3 to 9.6, typical of marine phytoplankton. C:P and N:P ratios vary from the Redfield ratio to 229 (C:P) and 37 (N:P). A constant C:N ratio of 6.87 from regression of particulate C and N concentrations demonstrates that the particulate matter in the systems originates from primary production. C:P and N:P ratios from regression of C on P and N on P are well associated with changes in salinity. The low N:P ratio of 13.1 implies N limitation in the environments of the systems. This seems to result from the low N:P ratio of nutrients released across sediment-water interface. Phytoplankton response, expressed here as the increase of chlorophyll a, to N addition also verifies N limitation for phytoplankton communities. In heavy rainfall season (from June to September), the addition of excessive N via streams into the stratified coastal water proliferates phytoplankton greatly. During the phytoplankton blooms, C:P and N:P ratios are much higher than the Redfield ratio, implying P limitation. This results from the high N:P ratio in nutrients supplied from stream waters. Strong stratification during the blooms also interrupts the supply of nutrients, particularly p, from bottom waters. Dependent upon precipitation, this tendency shows great inter-annual variation.

• 해양환경안전학회지
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• 제15권4호
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• pp.315-328
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• 2009

1997년부터 2008년까지 12년 동안 가로림연안 수질환경의 특성과 장기변동 경향을 조사하였다. 3개 조사정점에서 수층(표층, 저층)별 및 계절별로 년 4회 수온, 염분, 부유물질, 화학적산소요구량, 용존산소, 영양염류, 클로로필 a에 대해 조사한 결과, 표층수와 저층수 간에 수온을 제외한 진조사항목에서 표 저층간의 차이가 없었다. 공간적 분포특성은 모든 조사항목에서 정점간 유의적인 차이가 없어 가로림만 중간부터 외측으로 원활한 해수교환이 이루어지고 있었다. 계절별로는 수소이온농도와 암모니아질소을 제외한 조사 항목에서는 유의성이 입증되었고, 정점별로 대체로 비슷한 변화폭을 나타내었다. 12년 동안 수질의 장기 변동은 네 그룹으로 구분되어 항목에 따라 부분적으로 차이가 있으나 전반적 장기 변동을 조사한 결과 근래에 들어 염분은 높아진 반면, 용존무기질소, 질산질소 및 화학적산소요구량 등이 감소하고 있어 담수의 유입이 거의 없는 대체로 양호한 수질상태를 유지하고 있으며 수산학적으로 매우 중요한 연안으로 앞으로 지속적인 보전이 요구된다.

• 한국해안·해양공학회논문집
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• 제27권5호
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• pp.364-371
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• 2015

본 연구는 험한 해양환경하에서 천해역에 떠 있는 부유체 해양양식장의 동적 거동 해석기법을 연구하기 위해 시도되었다. 본 연구의 내용은 양식장의 설치 위치를 연안이 아닌 근해지역으로 옮겼을 때 파도의 영향과 함께 계류라인이 해저면에 설치된 영향, 즉 해저면의 영향이 많은 영향을 미칠 것이라는 타 논문에서 발표된 사실을 밝히기 위해 수치해석 프로그램을 개발한 내용이며, 이를 통해 천해역에 설치된 계류라인과 해양 양식장을 모형화한 부유체 바지의 연성된 동적 응답해석을 수행할 때 해저면의 강성을 고려할 수 있는 프로그램을 확보하게 되었다.

• 한국지리정보학회지
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• 제17권3호
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• pp.132-146
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• 2014

본 연구에서는 부산(Busan)에 설치된 자동기상관측망(AWS)과 국립수산과학원에서 관측하는 부산(Busan)과 기장(Gijang)지점의 해수면온도(SST)자료를 활용하여 부산(Busan)지역의 연안에서 발생하는 대규모 냉수대에 의해 형성된 차가워진 냉기가 도시기온에 미치는 영향을 살펴보았다. 첫째, 냉수대가 발생한 날(cold water)은 연안지역과 도심지역의 기온차가 약 $1^{\circ}C$이상 나타났으며, 냉수대가 발생하지 않은 날(non cold water)은 연안지역과 도심지역의 기온차가 약 $0.5^{\circ}C$로 냉수대가 발생한 날(cold water)보다 낮은 기온차를 보였다. 둘째, 주간의 경우 냉수대가 발생한 날(cold water)은 연안지역이 도심에 비해 약 $1^{\circ}C$ 정도 낮았다. 반면 냉수대가 발생하지 않은 날(non cold water)은 연안지역과 도심의 기온차가 약 $0.4^{\circ}C$로 냉수대가 발생한 날(cold water)에 비해 낮은 분포 차를 보였다. 반면 야간의 경우는 냉수대가 발생한 날(cold water)의 연안지역이 도심에 비해 약 $1.2^{\circ}C$, 냉수대가 발생하지 않은 날(non cold water)은 연안지역이 도심에 비해 약 $0.9^{\circ}C$ 낮았다. 야간의 기온은 주간의 기온에 비해 냉수대 발생 유 무에 상관없이 높은 기온차를 보였다.

• 한국항만학회지
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• 제5권2호
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• pp.65-75
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• 1991

Tidal current and water level change in coastal waters are formulated in terms of mathematical models. A systematic discussion of the derivation of a set of governing equations, expressing conservation of mass and momentum is presented. A simplification is introduced by integrating all variables and equations over the total water depth, the Solution of the formulated problem is achieved by using the finite difference method(FDM). The applied study area is taken from Mokpo harbor and its adjacent coastal water which have significant hydrographical changes due to the construction of the estuary barrage and land reclamation work of estuary barren. Some comparisons with the observed current and water level changes the numerical solutions are found to be considerably fit well for the recent coastal water motion.

• 한국수산과학회지
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• 제40권5호
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• pp.276-281
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• 2007

The toxicity of two species of puffer fish, Takifugu xanthopterus and T. stictonotus, collected from coastal regions of Korea, was determined using a mouse bioassay. The highest toxin scores in the muscle, skin, fins, and testis in both species were below 50 mouse units (MU) per gram, and for each organ of both species the proportion of toxic specimens containing ${\geq}10MU/g$ was less than about 10%. In T. xanthopterus, the highest toxin levels in the liver, gallbladder, and ovary exceeded 1,000 MU/g (1,275-1,910), while less than 200 MU/g (12-136) was detected in the same organs of T. stictonotus. Therefore, the toxicities of muscle, skin, and testis in both species of puffer fish were within acceptable levels for human consumption.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.332-335
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• 2006

Red tide(harmful algae) in the Korean Coastal Waters has a given a great damage to the fishery every year. However, the aim of our study understands the influence of meteorological factors (air and water temperature, precipitation, sunshine, solar radiation, winds) relating to the mechanism of red tide occurrence and monitors red tide by satellite remote sensing, and analyzes the potential area for red tide occurrence by GIS. The meteorological factors have directly influenced on red tide formation. Thus, We want to predict and apply to red tide formation from statistical analyses on the relationships between red tide formation and meteorological factors. In future, it should be realized the near real time monitoring for red tide by the development of remote sensing technique and the construction of integrated model by the red tide information management system (the data base of red tide - meteorological informations). Finally our purpose is support to the prediction information for the possible red tide occurrence by coastal meteorological information and contribute to reduce the red tide disaster by the prediction technique for red tide.