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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Marine Environment & Safety
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Journal DOI :
The Korean Society of Marine Environment and safety
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Volume & Issues
Volume 18, Issue 6 - Dec 2012
Volume 18, Issue 5 - Oct 2012
Volume 18, Issue 4 - Aug 2012
Volume 18, Issue 3 - Jun 2012
Volume 18, Issue 2 - Apr 2012
Volume 18, Issue 1 - Feb 2012
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Biogeochemistry of Alkaline and Alkaline Earth Elements in the Surface Sediment of the Gamak Bay
Kim, Pyoung-Joong ; Park, Soung-Yun ; Kim, Sang-Su ; Jang, Su-Jeong ; Jeon, Sang-Baek ; Ju, Jae-Sik ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 1~13
DOI : 10.7837/kosomes.2012.18.1.001
We measured various geochemical parameters, including the grain size, loss on ignition(LOI), total organic carbon(TOC), total nitrogen(TN), total sulfur(TS) and metallic elements, in surface sediment collected from 19 stations in Gamak Bay in April 2010 in order to understand the sedimentary types, the origin of organic matters, and the distribution patterns of alkali(Li, Na, K, Rb) and alkaline earth(Be, Mg, Ca, Sr, Ba) elements. The surface sediments were mainly composed of mud. The concentrations of Chlorophyll-a, TOC, TN, TS and LOI in sediment were the highest at the cultivation areas of fish and shellfish in the northern and southern parts of the bay. The redox potential(or oxidation-reduction potential) showed the positive value in the middle part of the bay, indicating that the surface sediment is under oxidized condition. The organic materials in sediment at almost all of stations were characterized by the autochthonous origin. Based on the overall distributions of metallic elements, it appears that the concentrations of alkali and alkaline earth elements except Ba in sediment are mainly influenced by the dilution effect of quartz. The concentrations of Sr and Ba are also dependent on the secondary factors such as the effect of calcium carbonate and the redox potential.
Water Quality Assessment at Coastal Area of the East Sea of Korea
Kim, Young-Sug ; Lee, Yong-Hwa ; Choi, Hee-Gu ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 15~24
DOI : 10.7837/kosomes.2012.18.1.015
This study aims to investigate characteristics of water quality factors by using survey results of national marine environmental monitoring system from 2004 to 2010 at coastal area of the East Sea of Korea. In this study, we chose statistical methods to analyze the correlation among water quality parameters and principal component analysis for characteristics of each water environment. In addition to this, we evaluated each water's pollution level based on eutrophication standard of OECD, Eutrophication Index(EI), and Organic Pollution Index(OPI). Major factors were chlorophyll a and salt according to the analysis at coastal area of the East Sea. The sea was divided into the south and the central part by Jukbyeon. Also, Jukbyeon in the central part of the East Sea and Gampo in the southern sea coastal waters have been classified separately. The nutritional status of coastal area of East Sea presented Mesotrophic to Oligotrophic level and EI showed less than 1. OPI in all of the coastal area at the East Sea represented that the water quality condition was favorable.
Tidal Current Characteristics around the Geomoondo Marine Afforestation
Jung, Jong-Ahm ; Shin, Chun-Su ; Kim, Jong-Kyu ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 25~32
DOI : 10.7837/kosomes.2012.18.1.025
To arrange effectively artificial reefs for marine afforestation, tidal currents were analyzed by numerical experiments. The numerical experiments were carried out by EFDC(Environmental Fluid Dynamics Code), and water column was vertically divided 5 layers. Tidal current patterns showed to be affected by main current at outside of study area, and circle currents of two were observed from analysis of residual currents. The calculated harmonic constants of tide and tidal current agreed well with those of observations at two stations for tide and two stations for tidal current. The model successfully reproduced the tidal current around the Geomoondo marine afforestation. It suggest that artificial reefs for marine afforestation should be installed belt zone at study area.
Application of Hydrographic Data Model in the Field of Maritime Safety Information for ODA Project
Oh, Se-Woong ; Lee, Moon-Jin ; Kim, Hye-Jin ; Suh, Sang-Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 33~39
DOI : 10.7837/kosomes.2012.18.1.033
Official Development Assistance(ODA) Project is initiated to assist a developing country economically and to promote its welfare. Support on training and information system development are the primary elements in the maritime safety field. The maritime safety information system(MSIS) of ODA projects deals with maritime safety information of developing nations and ensures an inter-operability between other systems. Therefore, it is required to develop MSIS based on the Universal Hydrographic Data Model(UHDM) of International Hydrographic Organization(IHO). In this paper, we have analyzed the current status and operational process of UHDM established by IHO. Oil spill response system was selected as an example of MSIS project and, also, considered the application results to the maritime safety field of UHDM.
A Study on the Ship's Speed for Reducing the Fuel Oil Consumption in Actual Ships
Kim, Soon-Kap ; Lee, Yun-Sok ; Kong, Gil-Young ; Kim, Jong-Pil ; Jung, Chang-Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 41~47
DOI : 10.7837/kosomes.2012.18.1.041
Recently, due to the rapid rise of the international oil price, the burden of fuel oil expense is relatively increasing in a ship. And the international restriction of the greenhouse gas which was generated from the burning of fuel oil is also rapidly strengthened. Therefore, to reduce the greenhouse gas and fuel oil consumption, many shipping company adopted the low speed navigation and it was focused on the improvement of fuel consumption efficiency and the usage of alternative energy in the marine engine development field. In this paper, the fuel oil consumption according to the ship's speed was measured in the actual seas and analyzed the shop test results in the shipyard and the ship navigation data from the abstract log. And then it was proposed that the ship's economic speed was 14~15kts and the optimum rpm was 140~150 in specific sea conditions.
The Development of Earthquake Disaster Prevention System in Long Span Bridge
Chang, Chun-Ho ; Yun, Jeong-Hyeon ; Lee, Yun-Me ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 49~54
DOI : 10.7837/kosomes.2012.18.1.049
The purpose of this study is to define emergency response procedures by BDMS [Building Disaster Management System] when earthquake occurs on long-span bridge structures. The study is about developing a computer-based algorithm for various earthquake intensities that works with the System. Presently, long-span bridge disaster prevention relies on closed-system centered on human intervention alone. However, this study combines IT technology and internet-based open system creating a more practical system. Additionally, assigned duties and tasks are clearly defined to all personnel involved in various disaster situations using the Active Action Diagram(AAD) techniques. Also, the design of 3-dimensional view assists to determine the appropriate initial response in times of earthquake and other disasters. The combination of the existing manual emergency response procedures and the scenario-based (IT) response system being developed will create an efficiency and fast response actions in times of emergencies.
A Study on Effect of n-heptane Mixing on PAH and Soot Formation in Counterflow Ethylene Diffusion Flames
Choi, Jae-Hyuk ; Han, Won-Hui ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 55~60
DOI : 10.7837/kosomes.2012.18.1.055
In order to investigate the effect of n-heptane mixing on PAH and soot formation, small amount of n-heptane has been mixed in counterflow ethylene diffusion flame. Laser-induced incandescene and laser-induced fluorescene techniques were employed to measure soot volume fraction and polycyclic aromatic hydrocarbon(PAH) concentration, respectively. Results showed that the mixing of n-heptane in ethylene diffusion flame produces more PAHs and soot than those of pure ethylene flame. However, signals of LIF for 20% n-heptane mixture flame were lower than that of pure ethylene flame. It can be considered that the enhancement of PAH and soot formation by the n-heptane mixing of ethylene can be explained by methyl(
) radical in the low temperature region. And it can be found that reaction rate of H radical for 10% n-heptane plays a crucial role for benzene formation.
The Effectiveness of the Dispersant Use during the "Deepwater Horizon" Incident -REVIEW of the Proceedings from 2011 International Oil Spill Conference-
Cho, Hyun-Jin ; Ha, Chang-Woo ;
Journal of the Korean Society of Marine Environment & Safety, volume 18, issue 1, 2012, Pages 61~65
DOI : 10.7837/kosomes.2012.18.1.061
Once oil has spilled, oil spill responders use a variety of countermeasures to reduce the adverse effects of spilled oil on the environment. Mechanical methods of containment and recovery are preferred as the first response when the use of other methods fail or are ineffective. In these cases, the application of oil dispersants shall be use only as a last resort. While effectiveness of dispersants in removing oil form the sea surface is proven, the use of dispersants is controlled in almost all countries due to the toxicity of their active agents and the dispersed oil on the marine environment. However, according to reports, after dispersant application, no significant toxicity to fish or shrimp was observed in the field-collected samples. Moreover, the results also indicate that dispersant-oil mixtures are generally no more toxic to the aquatic test species than oil alone. During the Deepwater Horizon Incident, dispersants were applied to floating oil and injected into the oil plume at depth. These decisions were carefully considered by state and federal agencies, as well as BP, to prevent as much oil as possible from reaching sensitive shoreline habitats. Net Environmental Benefit Analysis for dispersant use assumed that dispersants appear to prevent long-term contamination resulting absence of oil in the substrate and will benefit marine wildlife by decreasing the risk of significant contamination to feathers or fur. Further study to use dispersants with scientific baseline is needed for our maritime environment which consistently threaten huge oil spill incidents occurrence.