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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society for Marine Environment & Energy
Journal Basic Information
Journal DOI :
The Korean Society for Marine Environmental Engineering
Editor in Chief :
Volume & Issues
Volume 12, Issue 4 - Nov 2009
Volume 12, Issue 3 - Aug 2009
Volume 12, Issue 2 - May 2009
Volume 12, Issue 1 - Feb 2009
Selecting the target year
Fresh Water Flume Analysis Using an Unstructured Grid Ocean Circulation Model
Hwang, Jin-Hwan ; Park, Young-Gyu ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 227~234
Using a finite volume ocean circulation model based on an unstructured grid (FVCOM), we studied the structure of a fresh water bulge that influences on the Region Of Freshwater Influence. Fresh water discharged a river forms a coastal boundary current to the righthand side and a cyclonically circulation freshwater bulge that grows with time. In the middle of the bulge, vertical motions bring fresh water to the bottom. When tidal motions are included, the bulge disappears while the boundary currents becomes wider. Through a simple comparison of areas occupied low salinity water we quantified vertical and horizontal mixing due to the tide and showed that the tidal motion enhances the vertical mixing. During the first few tidal cycles right after the onset of the river discharge, due to tidal excursion the horizontal mixing becomes stronger. The vertical mixing by the tide mixes the fresh water After a certain time the water around the river mouth is well mixed and the horizontal excursion of the fresh water near the river mouth does not have much effect on the horizontal mixing. When there is no tidal motion horizontal mixing is mainly by the inertial instability at the surface and the horizontal mixing becomes stronger over time.
Distributions of Water Temperature and Salinity in the Korea Southern Coastal Water During Cochlodinium polykrikoides Blooms
Lee, Moon-Ock ; Choi, Jae-Hoon ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 235~247
In order to elucidate the cause of Cochlodinium polykrikoides blooms in the Korea southern coastal water, we investigated observational data of water temperatures and salinities in summer and winter, obtained from the stoppage of ship by NFRDI (National Fisheries Research and Development Institute) as well as composite images by NOAA from 1995 to 2008. Cochlodinium polykrikoides blooms occurred when water temperature was approximately
and salinity was 31.00 psu on average in Narodo neighboring seas. Different thermohaline fronts were observed between the Korea southern coastal water and the open sea water in summer and winter, respectively. That is, in winter four fronts were observed between the Korea southern coastal water with low temperature and low salinity, intermediate water originated from Tsushima Warm Current, Tsushima Warm Current with high temperature and high salinity, and the China coastal water with low temperature and low salinity. In contrast, in summer two fronts were observed between the Korea southern coastal water with low temperature and high salinity, Tsushima Warm Current with high temperature and low salinity, and the China coastal water with high temperature and high salinity. These thermohaline fronts also proved to be formed by two water masses with a different physical property, in terms of T-S diagrams. Consequently, we noticed that C. polykrikoides blooms occurring in Narodo neighboring seas in summer had a close relationship with thermohaline fronts observed between the Korea southern coastal water and Tsushima Warm Current.
Material Budgets in the Youngsan River Estuary with Simple Box Model
Lee, Kyeong-Sig ; Jun, Sue-Kyung ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 248~254
Budgets of fresh water, salt, DIP and DIN in the Youngsan river estuary were estimated seasonally in order to clarify the characteristics of material cycling and flux of nutrients with a simple box model. Inflow volumes of freshwater into system was approximately
and existing water mass of freshwater in system calculated by salt budget was approximately
. Mean residence time of freshwater was calculated to be about 0.26~2.03 day. water exchange
assumed with salinity between estuary and adjacent ocean. Inflow mass of DIN and DIN were approximately 76.63~1,149.91 ton/month and 2.91~61.22 ton/month, respectively. Residence times of DIP and DIN were calculated to be 0.45~1.10 day and 0.28~1.92 day, respectively. The ratio of water residence time versus DIP, DIN residence time was calculated that freshwater residence time was longer than DIP, DIN residence time except for summer season. Thus, We assume that circulation of Nutrients in the system will happen rapidly except for summer season. Specially DIP in Winter could assume to outer input source existence because of seawater inflow in system and high DIP concentration in open sea.
Estimation of Efficient Use of Volume and Facility Volume Distribution of Artificial Reefs deployed in the Busan Sea Region
Kim, Ho-Sang ; Lee, Jeong-Woo ; Won, Seung-Hwan ; Kim, Jong-Ryeol ; Yoon, Han-Sam ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 255~263
This study assessed the facility volume distribution for artificial reefs (ARs) deployed at the sea bottom in fishing grounds in the Busan Sea region, and estimated the efficient use of volume in the initial AR group. Analysis of the volume of AR facilities in the Busan Sea region indicated that the quantity and surface areas of deployed facilities varied greatly between 1997 and 2004. However, a rapid decrease in AR facility volume after 2003 indicated an increased use of different kinds of ARs, such as steel or ceramic ARs. And the results revealed that a total of 2,777 AR facilities were deployed in the Gijang sea region with a founding ratio of 89%; corresponding numbers for the Heaundae and Namgu sea region were 7,691 and 84.9%, and 905 and 96% for the cubic type of AR in the Saha and Gangseo sea regions. The analysis indicated that ARs deployed in the Busan sea region maintained a good conservation ratio of more than 85%. The loss in AR volume (approximately 15%) was due to subsidence, breakaway, and incomplete deployment.
Numerical Simulation of Spilled Oil Dispersion in Taean Coastal Zone
Jung, Tae-Sung ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 264~272
Due to an oil spill accident occurred in Taean coastal zone wide range of coastal waters were polluted. Inaccurate prediction of spilled oil trajectory is known as a cause that has increased the pollution damage in the beginning stage. In this study, a numerical modeling of spilled oil dispersion has been conducted to know which physical factors caused the severe and wide pollution. Especially the simulation is focused on how to model hydrodynamic circulation accurately. The simulation results showed that the hydrodynamic flow is very important in predicting oil fate, specially, in the short-term dispersion of spilled oil.
Computational Analysis of Parabolic Overtopping Wave Energy Convertor
Liu, Zhen ; Hyun, Beom-Soo ; Jin, Ji-Yuan ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 273~278
Overtopping Wave Energy Convertor (OWEC) is an offshore wave energy convertor for collecting the overtopping waves and converting the water pressure head into electric power through the hydro turbines installed in the vertical duct which is fixed in the sea bed. The numerical wave tank based on the commercial computational fluid dynamics code Fluent is established for the corresponding analysis. Several incident wave conditions and shape parameters of the overtopping device are calculated. The straight line type and parabolic type of the sloping arm are compared in the optimal designing investigation of the overtopping characteristics and discharge for OWEC device. The numerical results demonstrate that the parabolic sloping arm is available for wave running up and the overtopping discharge increasing.
Response Activities for Tar Ball Pollution from the 'Hebei Spirit' Oil Spill in the Southwestern Sea of Korea
Cho, Hyun-Jin ; Kim, Jeong-Yeop ; Yang, Mun-Chul ; Seo, Kang-Ryul ; Min, Nam-Gi ; Im, Sung-Huk ; Jeon, Sung-Gun ; Kim, Hee-Sik ; Kim, Young-Hwa ; Kim, Gi-Hun ; Chang, Sun-Hee ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 279~283
Approximately 12,547 kL of oil from the tanker 'Hebei Spirit' released into the western sea of Korea, which subsequently reached and covered extensive areas of the western coastlines of Korea. In the following days great numbers of tar balls hit the southwestern coast. Three different cleanup methods were used to mediate the southwestern coastline tar ball pollution by Korea Coast Guard (KCG) net setting, manual pick up, and sweeping them up. Net setting was useful in protecting coastlines from being hit by tar balls. The cold weather in winter conditions helped the tar ball response efforts because it caused them to harden, allowing them to be swept up from beaches and to be gathered up by hand.
An Estimation of the Amount of Ship's Ballast Water to be Discharged at Korean Major Ports
Choi, Hark-Sun ; Kim, Han-Soo ; Lee, Seung-Guk ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 284~288
The International Convention for the Control and Management of Ships Ballast Water & Sediments was adopted by consensus at a diplomatic conference of IMO at 2004. To prepare the Ballast Water Management Convention, fundamental technologies such as treatment system, type approval, risk assessment and various technical informations for formulation of the regulation for national strategy shall be developed. The information item of voyage and discharge of ship's ballast water are gathered by visiting vessel and agent at port. Using the 97 results by ships type characteristic analysis on the relation between loading/unloading and discharge/uptake of ballast water, the amounts of discharge/uptake of ballast water at each port and all of country in Korea are predicted. Hence, It is apparent that the uptake of ballast water is predicted to about 70 million ton in total of Busan, Incheon, Kwangyang and Ulsan ports at 2006 which is over 3 times than discharges.
Novel Fiber Optic Microbend Sensor for the Measurement of Cable's Curvature
Oh, Sang-Woo ; Choi, Hyeuk-Jin ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 289~295
In this paper the measurement method of cable's curvature using fiber optic microbend effect and its experimental results are presented. The novel structure of fiber optic microbender, which can generate microbend effect on the optical fiber in the case of both directional bending of cable, was designed. Through the experiment using suggested sensing system, the increasing trend of attenuated optical power was found out under the range from
of curvature. To the multi and distributed measurement, using OTDR, the scattered optical pulses at the bending points are measured and compared with the result which was measured by optical power meter.
A Study for the Dynamic ENC Development
Park, J.M. ; Oh, S.W. ; Song, Y.S. ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 296~301
The ENCs, which is a database for the use of maritime navigation within the ECDIS on the ships are recently being utilized in wide marine applications. But, even though official ENCs have been produced according to the IHO S-57 and S-52 standards, current ENCs are limited to their static characteristics of contents and structures being inherited from the analog media style of the traditional paper charts. Thus these limitations are often recognized as barriers to the full use of high resolution and advanced digital technologies. This paper presents prototype development results which demonstrate dynamic ENC features using high density ENCs and simulated tidal information to support various marine GIS fields as well as efficient and safe navigation purpose.
Effect of Nano Particles on the Hathcing rate of Artemia sp. Cyst Zooplankton
Jeong, Yeon-Kyu ; Lee, Byeong-Woo ; Park, Chan-Il ; Choi, Kwang-Soo ; Kim, Mu-Chan ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 302~306
9 kinds of nanoparticle used for this study was a particle with the size of less than 100 nm of diameter, and Artemia sp. cyst examined what kind of influence to have upon the process hatched out in nauplius. 82% hatched in nauplius at the opposition ward where a nanoparticle wasn't added after 24 time course. AGZ020, Nano silver, P-25, Sb and SnO nanoparticle showed hatching rate of 18%, 20%, 13%, 50% and 0% respectively by the 20mg/L density, and it became clear that a harmful effect is big, but I had a harmful effect compared with the opposition ward by 75%, 60%, 73% and 73% respectively by Ag-
, In, Sn and Zn nanoparticle, but a feeble thing was known relatively compared with AGZ020, Nano silver, P-25, Sb and SnO nanoparticle. The difference has caused this with the ingredient a nanoparticle has. Ag is included 2 % and AGZ020, Nano silver and P-25 nanoparticle are used widely as anti-fungus agent, and the SnO nanoparticle which became combination is a light catalyst pill, and oxygen is used for a Sn particle. This and others, a possibility that use is generalized and flows into aquatic environment in sequence the home electronics, functionality cosmetics, anti-fungus agent and a light catalyst pill at present becomes high for nanoparticles and others. The anxiety which has an influence on the ecology world in the water with this can be generated, so I'd have to study the potential danger a nanoparticle has continuously.
Scheme on Environmental Risk Assessment and Management for Carbon Dioxide Sequestration in Sub-seabed Geological Structures in Korea
Choi, Tae-Seob ; Lee, Jung-Suk ; Lee, Kyu-Tae ; Park, Young-Gyu ; Hwang, Jin-Hwan ; Kang, Seong-Gil ;
Journal of the Korean Society for Marine Environment & Energy, volume 12, issue 4, 2009, Pages 307~319
Carbon dioxide capture and storage (CCS) technology has been regarded as one of the most possible and practical option to reduce the emission of carbon dioxide (
) and consequently to mitigate the climate change. Korean government also have started a 10-year R&D project on
storage in sea-bed geological structure including gas field and deep saline aquifer since 2005. Various relevant researches are carried out to cover the initial survey of suitable geological structure storage site, monitoring of the stored
behavior, basic design of
transport and storage process and the risk assessment and management related to
leakage from engineered and geological processes. Leakage of
to the marine environment can change the chemistry of seawater including the pH and carbonate composition and also influence adversely on the diverse living organisms in ecosystems. Recently, IMO (International Maritime Organization) have developed the risk assessment and management framework for the
sequestration in sub-seabed geological structures (CS-SSGS) and considered the sequestration as a waste management option to mitigate greenhouse gas emissions. This framework for CS-SSGS aims to provide generic guidance to the Contracting Parties to the London Convention and Protocol, in order to characterize the risks to the marine environment from CS-SSGS on a site-specific basis and also to collect the necessary information to develop a management strategy to address uncertainties and any residual risks. The environmental risk assessment (ERA) plan for
storage work should include site selection and characterization, exposure assessment with probable leak scenario, risk assessment from direct and in-direct impact to the living organisms and risk management strategy. Domestic trial of the
capture and sequestration in to the marine geologic formation also should be accomplished through risk management with specified ERA approaches based on the IMO framework. The risk assessment procedure for
marine storage should contain the following components; 1) prediction of leakage probabilities with the reliable leakage scenarios from both engineered and geological part, 2) understanding on physio-chemical fate of
in marine environment especially for the candidate sites, 3) exposure assessment methods for various receptors in marine environments, 4) database production on the toxic effect of
to the ecologically and economically important species, and finally 5) development of surveillance procedures on the environmental changes with adequate monitoring techniques.