• Korean Architects
• /
• no.10 s.223
• /
• pp.6-21
• /
• 1987

• 한국지구과학회:학술대회논문집
• /
• 2005.02a
• /
• pp.252-252
• /
• 2005

• Economic and Environmental Geology
• /
• v.50 no.6
• /
• pp.477-486
• /
• 2017

In this study, we analyze precise seabed geomorphology and conditions for comparing the nearshore areas of the Dongdo(East Island) and the Seodo(West Island) using detailed bathymetry data and seafloor backscattering images, in Dokdo, the East Sea. We have been obtained the detailed bathymetry data and the seafloor backscattering data. The survey range is about $250m{\times}250m$ including land of islets to the nearshore areas of the southern part of the Dongdo and the Seodo. As a result of bathymetry survey, the southern area of the Dongdo(~50 m) is deeper than the Seodo(~30 m) in the water depth. The survey areas are consist of extended bedrocks from land of the Dongdo and the Seodo. The underwater rock region of the Seodo is larger than the Dongdo. In spite of similar extended rocks features from islets, there are some distinctive seabed characteristics between the southern nearshore areas of the Dongdo and the Seodo. The Talus-shaped seafloor environment formed by gravel and underwater rocks originating from the land of the Dongdo is up to about 15 m depth. And the boundary line of between extended bedrocks and seabottom is unclear in the southern nearshore of the Dongdo. On the other hand, the southern coast of the Seodo is characterized by relatively large scale underwater rocks and evenly distributed sediments, which clearly distinguish the boundary of between extended bedrocks and seafloor. This is because the tuff layers exposed to the coastal cliffs of the Dongdo are weak against weathering and erosion. It is considered that there are more influences of the clastic sediments carried from the land of the Dongdo compared with the Seodo. Particularly, the land of the Dongdo has been undergoing construction activities. And also a highly unstable ground such as faults, joints and cracks appears in the Dongdo. In previous study, there are dissimilar features of the massive tuff breccia formations of the Dongdo and the Seodo. These conditions are thought to have influenced the different seabed characteristics in the southern nearshore areas of the Dongdo and the Seodo.

• Journal of the Korean earth science society
• /
• v.39 no.2
• /
• pp.154-163
• /
• 2018

Geoacoustic model comprises physical and acoustic properties of submarine bottom layers influencing sound transmission through sea water and underwater. This study suggested for the first time that we made a geoacoustic model of long-coring bottom layers at the SSDP-105 drilling site of the Ulsan coastal area, which is located in the southwestern inner shelf of the East Sea. The geoacoustic model of 52 m depth below seafloor with three-layer geoacoustic units was reconstructed in the coastal sedimentary strata at 79 m in water depth. The geoacoustic model was based on the data of a deep-drilled sediment core of SSDP-105 and sparker seismic profiles in the study area. For actual modeling, the geoacoustic property values of the models were compensated to in situ depth values below the sea floor using the Hamilton modeling method. We suggest that the geoacoustic model be used for geoacoustic and underwater acoustic experiments of mid- and low-frequency reflecting on the deep bottom layers in the Ulsan coastal area of the East Sea.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.7 no.1
• /
• pp.41-49
• /
• 2001

미국은 연방국가이기 때문에 미국의 주요정책을 이해하기 위해서는 연방정격의 정책과 주정부의 정책 을 살펴봐야함. 연안통합관리정책도 마찬가지이며, 여기서는 우선 연방정부의 정책을 소개하며, 주정부의 정책은 다음 기회에 소개하고자 함 본고는 필자가 1년 6개익간 미국 로드아일랜드대학교의 연안자원센타 에서 연안통합관리에 관한 연수할 기회를 가졌는데 동 기간동안 수집한 자료들을 정리한 것임.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2022.06a
• /
• pp.177-178
• /
• 2022

본 연구는 미국의 다양한 연안해운 정책 중 America's Marine Highway Program(AMHP)을 중심으로 분석하였으며 도출된 시사점으로 바탕으로 우리나라 제주도 물류의 고비용을 초래하는 비효율화를 개선하는데 필요한 연안해운 정책의 방향성을 설정하고 공적 역할의 필요성을 위한 기초자료로 활용하고자 한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2000.10a
• /
• pp.97-98
• /
• 2000

까나리는 우리나라 동ㆍ서ㆍ남해 연안 및 일본, 알라스타 연안에 널리 분포하고 있으며 동해안에는 강원지역인 대진, 속초, 주문진, 동해, 임원 등에서 10-12월에 자망으로 일시에 대량 어획되고 있다. 서해안에는 4-6월에 낭장망에 의해 대량 어획되는 까나리가 액젓으로 가공되고 있으며, 4-5년 전부터 중소기업이 중심이 되어 액젓시장에 참여하고 있다. 하지만 동해안 까나리에 대하여서는 식품학적 가치가 개발되지 않아 선어의 일부분은 소건품으로 가공되어 식용되고. 나머지는 거의 대부분이 넙치 축양장 등의 양어 사료로 이용되고 있다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2001.05a
• /
• pp.571-572
• /
• 2001

찰가자미, Microstomus achne는 붕넙치과 찰가자미속에 속하며 우리나라의 동남해 연안과 일본, 소련 사할린 및 쿠릴 연해에 분포 서식하는 어류로 알려져 있다. 우리나라에서 주로 어획되는 시기인 겨울철에 찰가자미는 남해와 동해 일부 연안에서 식용으로도 이용되나, 자원량이 많지 않은 유용 수산자원 품종으로 이들 찰가자미에 대한 연구 결과들도 많이 보고되어 있지 않은 실정이다. (중략)

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.24 no.6
• /
• pp.773-784
• /
• 2018

In this study, we examined the UA (upwelling age) using wind data of AWS/ASOS in the East Sea coast and the correlation between UA and SST (sea surface temperature) from May to August in 1995 to 2016. The data used the 6 observations of the wind data of AWS/ASOS and the SST data of the COD/RISA provided by the National Institute and Fisheries Science near the East Sea coast. The UA was calculated quantitatively low but it rose when the actual cold water mass occurred. Correlation analysis between UA and SST showed the negative (-) r (correlation coefficient) predominately. At the time of cold-water mass in June to August 2013, the r had a very high negative value of -0.65 to -0.89 in the 6 observations. It proved that as the UA increases, the SST is lower. By knowing the UA, we were able to evaluate the trend of upwelling in the cold-water mass of the East Sea coast in the long term and it will contribute to minimizing the damage to aquatic organisms according to the size and intensity of the upwelling.

• Journal of Korean Society of Coastal and Ocean Engineers
• /
• v.25 no.5
• /
• pp.311-316
• /
• 2013

In this study, the wave energy potential (WEP) was evaluated using the wave data measured at nine stations along the Korean east coast and compared with the results of previous studies. Along the Korean east coast, seasonal variations in the WEP were around 6.4 kW/m in winter and 1.2 kW/m in summer, greater than spatial variations of 2.5~4.3 kW/m. In most stations, the wave power during June to July were shown to be smallest. The estimated annual average WEP was greatest in the Mukho and Jukbyeon stations located in the middle of the Korean east coast at around 4.3 kW/m, and smallest in the Jinha station at around 2.5 kW/m. The results found using the previous hindcast data showed WEP having a tendency to decrease from south to north. However, in this study, the WEP showed a tendency of being greatest in the middle of the Korean east coast and decreasing in both north and south directions.