• 한국해양학회지
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• v.24 no.3
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• pp.132-147
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• 1989

A total of 83 surface sediments and 55 sea water samples, collected from the southwestern sea of Cheju Island, were analyzed in order to understand their textural characteristics, geochemical composition and the clay mineralogical features. The sediments were subdivided into ten textural classes, namely clayey sand, slightly gravelly muddy sand, sandy clay, clay and mud. The coarse and fine-grained mixed sediments are distributed in the northern part and around the Island, whereas the fine-grained deposits are mainly distributed in the central and southern parts of the study area; small scale mud patches are distributed in the southwestern and northern parts of Cheju Island. The high concentration of total suspended matter in study area gradually increase toward the southwestern and northwestern offshore area. The concentration of geochemical elements is as follow: the content of Mn, Al, Zn, Cr, Cu and Sn increase toward the southern part which is covered mainly with fine-grained deoposits, whereas the content of Ca, Mg and Ag is higher in the northern area; the elements such as Ni, Na, Fe and Pb are more concentrated relatively in muddy deposits rather than in sandy sediments. The light minerals such as Na-Ca feldspars show a high content around the Socotra Rock, toward the Soheugsan and Cheju Islands, but the K-feldspars are relatively high around the Cheju Island. It was noticed that the provenance of these sediments is partly influenced by the geological characteristics near the island. X-ray diffractogram for clay minerals from the southeastern mud patch and around the Soheugsan Island shows the diagnostic calcite peak indicating that the greater part of these clay fraction may have been derived from present and ancient Hwangho River. The high concentration of smectite in the northern part near the Cheju and around the Soheugsan Islands, eastern side of Socotra Rock probably result from supplies smectite altered from volcanic materials distributed in the Cheju Island and Socotra Rock, whereas the samples near the Chuja and northern parts of the Cheju Island contain weak calcite peak and high concentration of kaolinite and chlorite which is closely related to the geolgical characteristics on the adjacenting land area.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.5
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• pp.3345-3350
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• 2014

We investigated to assess the relationships between the major nutrients and phytoplankton dynamics during the spring season in 2010 and 2011 at 23 stations in Jinhae Bay, Korea. The bay is divided into four different zones based on pollutant sources and geographical characteristics. Nutrient limitation (>80%) was significant in Zone II, which is located in central bay and is influenced by the water well mixed from outer bay. The limited nutrient was followed in Zone III and IV that was occupying between 17% and 83%. However, the low levels are being kept below 35% in Zone I, which is characterized by the semi-enclosed eutrophic area of Masan and Haegam bays. Based on the PCA (principle component analysis) analysis, the nitrogen (N) sources in 2010 were particularly dominant and it may be due to the water mixing and wastewater formed from bottom layers and sewage. In 2011, major nutrients including nitrogen, silicon and phosphorus were dominant in the bay and are supplied by the river discharge after rainfalls with low salinity conditions. In particular, the N nutrients being supplied in 2010 are correlated with pennate diatoms Pseudo-nitzchia spp. and is not related to the phytoplankton population densities in 2011. The present study suggests that N sources play an important role in the proliferation of diatom, and the rapid nutrient uptakes by them are potential nutrient limitation factors in the bay.

• Proceedings of KOSOMES biannual meeting
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• 2007.11a
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• pp.175-176
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• 2007

선박통항이 빈번하고 해상 교통밀도가 높아 해양사고가 빈번한 서남해역의 해상교통안전에 기여하고자 진도 연안VTS 센터를 구축, 2006년 7월 19일 개국식을 갖고 본격적인 운영을 하고 있다. 따라서 본 연구에서는 진도 연안VTS 관제범위내 주변환경과 항행 위해요소 분석, 교통실태 관측조사 및 해양사고 분석을 통한 해상교통환경평가를 실시하여 진도 연안VTS 관제범위내 해상교통시스템 개선을 위한 항행 위해요소를 제시한다

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.310-313
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• 2013

서남해 해역의 집약관리시스템, 기상신호표지시스템, 원격감시제어시스템 등 통합적으로 관리하는 통합관리시스템의 문제점을 도출하고 대책을 마련하여 효율적이고 합리적으로 관리하기 위한 방안을 모색하고자 하였다.

• 한국방재학회:학술대회논문집
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• 2011.02a
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• pp.216-216
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• 2011

목포는 지형 특성상 도시기반이 낮게 조성되어 있어 폭풍해일에 의한 영향이 그리 크지 않더라도 조위가 크게 상승하는 대조기에 해안 저지대에서는 침수범람이 빈번하게 발생하는 지역이다. 특히 1997년 8월 태풍 WINNIE(9713)와 2004년 7월 태풍 MINDULLE(0407)의 간접영향시기가 대조기 고조와 중첩됨에 따라 목포 내항 및 북항 일대에 해수범람 피해가 발생한 바 있으며, 이러한 피해에 대응하여 목포 해안시설물 표고는 1997년 이전의 D.L.(+)480~500cm(목포지방해양수산청, 1998)를 D.L.(+)550cm로 증고한 상태이다. 태풍이 발생하여 내습하는 시기에 해당하는 2010년 7월~9월까지 목포지역 조석예보표(www.khoa.go.kr)에 따르면 거의 매달 500cm 이상의 조위가 예측(최고 511cm, 2010년 8월 11일)되었고, 2004년 범람이 발생한 7월과 8월에는 5.2m 이상의 조위가 3회 이상 예측된 바 있다. 또한 2000년 이후 목포지역의 태풍에 의한 해일고가 매년 50cm 내외로 기록(최고 59 cm, 태풍 RUSA(0215)됨을 고려할 때 D.L.(+)550cm의 목포 해안시설물 표고는 범람피해로부터 안전을 확보하기에는 어려움이 있을 것으로 우려된다. 특히, 최근 2년 동안은 우리나라에 직접 영향을 미친 태풍이 없었으나, 올해 8월 중순에는 대조기에 태풍 DIANMU(1004)가 내습하여 남해안 일대에 피해가 발생하였고, 올해 9월 초에 서해안으로 상륙한 태풍 KOMPASU(1007)는 강한 세력을 유지하면서 북상하여 서해안 일대 및 수도권에 큰 피해가 발생하였다. 만약 태풍 KOMPASU(1007)가 태풍 DIANMU(1004)가 내습했던 대조기 또는 9월 중순의 대조기에 내습했다고 가정한다면, 목포와 같은 서남해안의 저지대는 물론 많은 해안지역에 엄청난 피해가 발생했을 것으로 사료된다. 이에 본 연구에서는 관련연구와 자료분석을 통해 목포해역의 침수범람 위험성을 파악하고, 올해 발생한 태풍의 수치모의 적용을 통해 위험성을 검토하고자 한다.

• Journal of the Korean Association of Geographic Information Studies
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• v.23 no.4
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• pp.184-207
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• 2020

This study aimed to determine candidate areas for tidal current-pumped storage hybrid power plants using GIS-based site selection analysis. The study area is the southwestern sea surrounding Jindo Island in South Korea. Factors to be considered for the site selection analysis were derived considering the design and installation characteristics of the hybrid power plant. Numerical simulation to predict tidal speed was performed using the MOHID(Modelo HIDrodin?mico) and the results were converted into spatial data. Subsequently, a GIS-based overlay analysis method proposed in this study was applied to derive the installation candidate area. A total of 10 regions were identified as candidate sites. Among them, it was determined that the power generator could be installed in relatively wide sea areas in Jindo, Seongnamdo, and Hajodo.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.36 no.2
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• pp.61-69
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• 2024

Wave conditions are crucial for offshore wind farm design, particularly in determining structural loads and layout. However, there is limited wave hindcasting research for the Wangdeungdo Island area, a potential offshore wind site. This study used the MIKE21 model for a year-long wave hindcast around Wangdeungdo in 2021. Validation showed high reproducibility for significant wave heights with RMSE values of 0.177 and 0.225 and Pearson correlations of 0.971 and 0.970 at Sangwangdeungdo and Buan buoys. Subsequent analysis of the wave characteristics near Wangdeungdo indicated significant seasonal variations and differences in maximum significant wave heights across locations, which are expected to significantly impact the design loads for offshore wind structures.

• Korean Journal of Environmental Biology
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• v.34 no.4
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• pp.329-345
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• 2016

In order to study the community structure and distribution pattern of macrobenthos in the subtidal area of Shia Sea between Haenam peninsula and Shinan-Jindo area at southwest coast of Korea, duplicate sediment samples were taken seasonally by van Veen grab (surface area, $0.1m^2$) from 49 stations between November 2001 and August 2002. The surface sediment facies were muddy sandy gravel near Mokpo-Gu channel, gravel in the Myoungrang channel with high tidal currents, and sandy muddy in the southern Uido area. Ignition loss in the sediment ranged from 0.5 to 1.5% with a mean of 0.6%. A total of 271 taxa were collected with a mean density of $166ind.\;m^{-2}$ and a mean biomass of $29.2g\;m^{-2}$. Polychaetes were dominant faunal group in terms of species richness and abundance, accounting for 34% and 40% of total species number and abundance, respectively. Molluscs accounted for 44% of biomass. Bio-Env analysis revealed that sediment composition and ignition loss affected the spatial distribution of subtidal macrobenthic community in the study area. Major dominant species were Photis longicaudata, Septifer keenae, Maldane cristata, Lumbrineris longifolia, Heteromastus filiformis and Coptothyris grayi. Based on cluster analysis, four station groups were classified. They were associated with sediment types. Bivalve, Striarca symmetrica, polychaetes, Glycera chirori, Heteromastus filiformis and decapod Latreutes planirostris were major contributing fauna in station group A, B, C, and D, respectively. These results suggest that macrobenthic community of the Shia Sea is normally influenced by sediment type and related ignition loss.

• Proceedings of KOSOMES biannual meeting
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• 2006.11a
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• pp.1-8
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• 2006

국민소득 증대와 주 5일 근무제 시행으로 육상레저관광에서 해양레저관광으로 그 추이가 이동되고 있다. 해양레저를 즐기고자하는 수요는 증가하고 있으나, 기반시설 부족으로 활성화가 이루어지지 못하고 있는 실정이다. 특히 우리나라 서남해안 해역은 2,000 여개의 다도해가 자연방파제 역할을 하고 있으므로 해양레저 산업을 활성화 시키는데 적합한 천혜의 자연조건을 보유하고 있다. 본 연구에서는 우리나라 해양레저 기반시설의 현황과 문제점을 분석하고, 서남해안 해양레저 산업 활성화에 필요한 친환경 마리나 시설 구축에 관한 자연조건, 해상조건 분석, 다목적용 마리나 시설에 관하여 논한다.

• 한국해양학회지
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• v.8 no.1
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• pp.33-45
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• 1973

Plankton samples used for the present study were collected by the NORPAC net during the CSK cruises in the Korean waters in March and August, 1967. Regional and seasonal variations in the zooplankton biomass (wet weight, mg/㎥) were noticed in the Korean waters. In March the highest biomass, 130mg/㎥ on the average, occurred in the southern part of Japan Sea, but the lowest biomass of less than 50mg/㎥ occurred in the Yellow Sea and the western sea of Cheju Island Contrally, in August, the average biomass of 120mg/㎥ was measured in the Yellow Sea, the western sea of Cheju Island and the coastal waters of southern Korea, while the biomass of Japan Sea was the lowest of the regions surveyed. In comparison with the zooplankton biomass, total number of zooplankton per cubic meter of water strained also showed regional and seasonal fluctuations. In general, variations in the number of zooplankton specimens follows the same trend as in the biomass. The largest number, up to 800mg/㎥ on the average, occurred in the southern part of Japan Sea in March and the lowest number, less than 200mg/㎥ occurred in the Yellow Sea and the western sea of Cheju Island. In August, as shown by the biomass fluctuations, the largest number of zooplankton 850mg/㎥ on the average occurred in the Yellow Sea, the western sea of Cheju Island and the coastal region of southern Korea. But the lowest number of less than 500mg/㎥ was found in the Japan Sea. Among the various groups of zooplankton examined, the following were dominant components of the zooplankton population: Copepoda, Chaetognatha, Siphonophora, Euphausiacea, Cladocera, Appendicularia, and Amphipoda. The zooplankton conposition was significantly differed between the Japan Sea and Yellow Sea. Copepods which usually occupied over 66% in the Japan Sea and thd Korean Strait samples occupied only 42% of the catches in August, while cladocerans and chaetognaths were relatively abundant, i. e., 15 and 18% of the total organisms. The most dominant species of copepods and chaetognaths were Paracalanus parvus, Oithona similis, Acartia clausi, Calanus helgolandicus, Sagitta enflata, S. bedoti, S. elegans and S. crassa.