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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Marine Environment & Safety
Journal Basic Information
Journal DOI :
The Korean Society of Marine Environment and safety
Editor in Chief :
Volume & Issues
Volume 19, Issue 6 - Dec 2013
Volume 19, Issue 5 - Oct 2013
Volume 19, Issue 4 - Aug 2013
Volume 19, Issue 3 - Jun 2013
Volume 19, Issue 2 - Apr 2013
Volume 19, Issue 1 - Feb 2013
Selecting the target year
Assessment of the Environmental Value of the Geum-river Estuary
Kwon, Young-Ju ; Yoo, Seung-Hoon ; Park, Se-Hun ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 417~429
DOI : 10.7837/kosomes.2013.19.5.417
The current study attempted to assess the environmental value of Geum-river estuary for rational management decision-making. To investigate the comprehensive properties of the Geum-river estuary, we applied the contingent valuation method based on multi-attribute utility theory. We surveyed a randomly selected sample of 400 and 600 households of the Geum-river estuary-neighboring area (Jeollabuk-do, Chungcheongnam-do), and other nation-wide large districts (except Jeollabuk-do, Chungcheongnam-do, and Jeju-do), respectively, and carried out person-to-person interviews with subjects on their willingness-to-pay for the estuary conservation and management program. Respondents, overall, accepted the contingent market system and were willing to contribute a significant amount, that is 1,497 won for the residents from the Geum-river estuary-neighboring area and 4,343 won for the residents from other nation-wide large districts on average, per household per year. These results implied that there were large difference between the two groups. The aggregate values of the Geum-river estuary for the estuary-neighboring area and other nation-wide large districts amount to 2.13 and 70.15 billion won, respectively, per year. This quantitative value deduced from the current study, could be a useful baseline fact for any decision-making process particularly in the establishment of management policies for the Geum-river estuary.
Establishment of Environmental Assessment using Sediment Total Organic Carbon and Macrobenthic Polychaete Community in Shellfish Farms
Cho, Yoon-Sik ; Lee, Won-Chan ; Kim, Jeong-Bae ; Hong, Sok-Jin ; Kim, Hyung-Chul ; Kim, Chung-Sook ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 430~438
DOI : 10.7837/kosomes.2013.19.5.430
In this study, the seasonal field survey was conducted in Goseong Jaran Bay(22 stations), Geoje Hansan Bay(15 stations) and Jinhae Bay(18 stations). We analyzed the sediment environmental parameters(Chemical Oxygen Demand, Ignition Loss, Acid Volatile Sulfides, Total Organic Carbon) and biotic parameters of macrobenthic polychaetes(number of species, density, diversity, evenness). It had a good correlation between total organic carbon and polychaete diversity(R
Temporal and Spatial Variations of Water Quality in the Cheonsu Bay of Yellow Sea, Korea
Park, Soung-Yun ; Heo, Seung ; Yu, Jun ; Hwang, Un-Ki ; Park, Jong-Su ; Lee, Sung-Min ; Kim, Chang-Mi ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 439~458
DOI : 10.7837/kosomes.2013.19.5.439
Temporal and spatial variations of water quality were investigated in the Cheonsu Bay of Yellow Sea, Korea from 2010 to 2011. Water samples were collected at 16 stations and physicochemical parameters were analyzed including water temperature, salinity, suspended solids (SS), chemical oxygen demand (COD), dissolved oxygen (DO), Chlorophyll a and nutrients. Spatial distribution patterns of all survey items were not clear among stations but the bimonthly variations were distinct except the bottom water of the suspended solids. The trend analysis by principal component analysis (PCA) during 2 years revealed the significant variations in water quality in the study area. Spatial water qualities were discriminated into 3 clusters by PCA; station cluster in the surface water 1, 2~11, and 12~16, the bottom water 1, 2~7, and 8~16. Annual bimonthly water qualities were clearly discriminated into 3 clusters by PCA. But tend of cluster in the surface and bottom water was difference, period most of the research was low in nutrient. Ecology-based water quality criteria was a good level of grade II. Bimonthly results are shown as III grade(normal) at June and August, II grade(good) at October and December and I grade for February and April. Water quality was showed by the input of fresh water same as those of Kyoungin coastal area, Asan coastal area, Gunsan coastal and Mokpo coastal area in the Cheonsu.
Fishing Characteristic of Beam Trawl Fishery in the Coastal Waters of Chungnam Province, Korea
Kim, Si-Yeop ; Im, Yang-Jae ; Jo, Hyun-Su ; Cha, Byung-Yul ; Kwon, Dae-Hyeon ; Hwang, Hak-Jin ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 459~466
DOI : 10.7837/kosomes.2013.19.5.459
To understand the fishery characteristics by a beam trawl off the coast of the Chungnam province, covering
25`N, a beam trawl was deployed 2~4 times a month from March 2008 to February 2009. The catch was consisted of 96 species of 63 families belonging to 19 orders. Among these, organisms were identified as 54 species of fish, 27 species of crustaceans, 9 species of gastropoda, bivalves, and 6 species of cephalopods. Trachysalambria curvirostris which is the target species of the beam trawl fishery occupied only 2.1% of the total catch, showing a low ratio of catches. Most of T. curvirostris was harvested from July to November while small amount of T. curvirostris was captured from May to December. In this study, we concluded that the bycatch ratio except T. curvirostris in T. curvirostris fishery was relatively high, thus the fishery of T. curvirostris might affect the fishery resource management of bycaught species off the coast of Chungnam province.
Overview of Major Oil Spill at Sea and Details of Various Response Actions 2. Analysis of Marine Oil Pollution Incidents in Korea
Kim, Kwang-Soo ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 467~475
DOI : 10.7837/kosomes.2013.19.5.467
In order to seize quantitative materials as part of studies on measures for oil pollution prevention and control, the statistics of oil pollution incidents in Korean coastal waters for 10 years from 2003 to 2012 were analyzed with relation to the number of oil spills and the volume of oil spilt according to causes, sources and sea areas of spills. Total number and total volume of oil spills for 10 years were found to be 2,833 cases and 17,877 kL, respectively. 50.4 %(1,429 cases) of total number of oil spills were caused by negligence, although oil spillage due to negligence was 294 kL(1.7 %). While oil spillage caused by marine accidents was 17,400 kL(97.3 %), marine accidents accounted for 27.9 %(790 cases) of total number of oil spills. While negligence had a great influence on the number of oil spills, marine accidents had a huge impact on the amount of oil spilt. Fishing boats accounted for 42.7 %(1,210 cases) of the number of oil spills, and although oil tankers accounted for 9.2 %(261 cases) of the number of oil spills, oil spillage from oil tankers was 15,488kL(86.7 %). It means that oil tankers such as VLCC or ULCC may be the main sources of major oil spills and a few very large spills are responsible for a high percentage of the amount of oil spilt. While the number of oil spill incidents was closely related to the accidents of fishing boats, the volume of oil spilt was greatly affected by the major oil spill incidents of oil tankers such as M/T Hebei Spirit. The number and volume of oil spills were shown to be 1,613 cases(56.9 %) and 3,804 kL(21.3 %) in South Sea, 700 cases(24.7 %) and 13,501 kL(75.5 %) in West Sea, and 520 cases(18.2 %) and 572 kL(3.2 %) in East Sea of Korea, respectively. The highest number of oil spills was found in South Sea and the most volume of oil spilt was shown in West Sea of Korea for 10 years.
A Basic Study on the VTS Operator`s Minimum Safe Distance
Kim, Jong-Sung ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 476~482
DOI : 10.7837/kosomes.2013.19.5.476
This study aims to enhance the effectivity of VTS(Vessel Traffic Service) control by investigating the minimum safe distance between vessel and vessel, vessel and land(obstacle) for the vessel`s safe navigation within the VTS control area. In addition, to suggest basic data for the safe navigation, this study has done survey and analysis to each VTS center, and individual on the minimum safe distance to VTS operators of each ports of korea. Through ocean voyage by training ship, Singapore and Malacca strait`s congested vessel traffic zone`s control distance was compared and investigated the difference on safe distance by the different VTS operators. As a result, there was huge difference of minimum safe distance between the VTS operators belong to the same center. Over all, the port with gentle coastline, like donghae, the safe distance was wider than the other port. On the other hand, port with complex coastline and frequent entry and departure of the vessel, like mokpo, the safe distance was the shortest of all. Therefore, development of module suitable to port`s natural conditions and traffic volume`s necessity is required, for the operators affiliated to the same VTS center control according to formal method. Lastly, the full discussion by the expert group about establishment of standard control procedure in the future should be considered as well.
A Study on Evaluation of Marine Traffic Congestion based on Survey Research in Major Port
Yoo, Sang-Rok ; Jeong, Cho-Young ; Kim, Chol-Seong ; Park, Sung-Hyun ; Jeong, Jae-Yong ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 483~490
DOI : 10.7837/kosomes.2013.19.5.483
In this study, we analyzed AIS measured data for ten days by selecting the four main ports with many ships arriving in the national ports. The peak time congestion of the main ports, calculated by survey research, was about 3.8-5.7 times higher than the hourly average congestion. This is very different from the results of the advanced research, evaluating the marine traffic congestion of the Ulsan main port based on the existing Port-MIS statistical data, which showed a peak time congestion of about 1.7 times higher than the hourly average. This identifies the problem of distorting the traffic characteristics of the current passage. Therefore, in order to evaluate marine traffic congestion, it would be more appropriate to calculate it based on survey research, rather than Port-MIS statistical data.
A Study on the Navigation Rules of Wing-In-Ground Effect Craft
Yun, Gwi-Ho ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 491~496
DOI : 10.7837/kosomes.2013.19.5.491
Since IMO(International Maritime Organization, hereafter IMO) has decided the Wing-In-Ground craft as one of the ships, A few regulations and recommendations have been revised and approved internationally and domestically. However, the navigation rules considering types and navigation characteristics to secure the safe navigation of Wing-In-Ground craft are not sufficient and especially, there are no navigation rule between Wing-In-Ground crafts. In this situation, it is judged that the navigation rules related to the Wing-In-Ground crafts in any condition of visibility should be moved to the section of the ones in sight of one another to define the responsibilities between WIG and other vessels, and the new regulation, which Type `B` and `C` WIGs should avoid Type `A` WIG, has to be established to ensure the safe navigation between WIGs on the current laws.
Numerical Simulation for New Marine Instrumentation Buoy
Ryu, Youn-Chul ; Seong, Yu-Chang ; Lee, Gyoung-Woo ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 497~502
DOI : 10.7837/kosomes.2013.19.5.497
There are currently 10 types of buoy, mostly which` design and development is dependent on foreign technology. In this study, it is aimed at the development of small instrumentation buoy and at the design proposal presented a numerically safety. The numerical method has the simulation of variety of marine environments, such as wave response amplitude ratio and each flux changes. Through the numerical simulation of buoy`s kinetic movement, it is analyzed that Pitching motion increases by the frequency response of encounter and Added resistance appears to be the most significant on transverse waves. Finally, the proposed buoy is confirmed with the response` safety under simulation` conditions.
Study on Improving Safety Cultures by Analysing Behavior Characteristics of Korean Seafarers
Kim, Young-Mo ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 503~510
DOI : 10.7837/kosomes.2013.19.5.503
This study aims to propose safety culture design to ease to find out and control behavior characteristics of Korean seafarers. By empirical research of 377 Korean seafarers, the result revealed that significant characteristic of Korean seafarers was "affection to others" and custom of Confucianism affected Korean maritime society prevalently. But there were no significant differences between groups, such as rank, age, gender and sailing route with vessel type except educational background. Furthermore, this study concluded that positive reinforcement was more useful than negative reinforcement to promote safety operation of vessels. Regarding the vessel`s safety management, the fact that means for vessel`s safety management are linked only to the levels of educational background suggests that the efficiency of vessel`s safety operation would be achieved by introducing suitable safety management system depending on the level of educational background.
A Comparative Study on Cognition Difference of Maritime Polices` Organization Culture
Kim, Jong-Gil ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 511~517
DOI : 10.7837/kosomes.2013.19.5.511
Maritime police recognize that the organizational culture of various acting as a member of the organization. Also, marine policing and security activities to determine the number of build. The overall culture of maritime police who share the organization sub-culture may take place. Maritime police organizational culture and a variety of types of group culture, hierarchical culture, development culture, rational culture examined the differences in perceptions. Maritime police aware of the general results of the analysis are as follows; First, the maritime police officers of the age group of 20 was the highest recognition in hierarchy culture and rational culture. Second, the maritime police officers of the rank of captain was the highest recognition in development culture and rational culture. Third, differences in the perception of organizational culture by recruitment analysis show the difference in cultural groups showed, in particular, the special recruitment group of police officers, and maritime police culture can be seen tend to appear low.
A Study on Characteristics of Exhaust Gas Emissions of Water-Bunker Oil Mixed by Homogenizer
Choi, Jung-Sik ; Han, Sang-Goo ; Choi, Jae-Hyuk ; Park, Sang-Kyun ; Park, Ro-Seong ; Kim, Dae-Hun ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 518~524
DOI : 10.7837/kosomes.2013.19.5.518
In this study, we conducted a study on characteristics of exhaust gas emissions from boiler when water-bunker oil mixed by homogenizer was burned in boiler. The results showed that NOx concentration and CO concentration of the homogenized bunker oil was decreased by 19% and 54% compared to pure bunker oil pretreatment was not being performed. And, in the case of water-bunker A oil, the NOx concentration was decreased with increasing water mixing ratio in bunker A oil. In particular, the NOx concentration in exhaust gas of 20 %water-80 %bunker A oil decrease by 45 % compared with pure bunker-A. However, the CO concentration in exhaust gas of 20 %water-80 %bunker A oil shows irregular changes. This means that the mixing of water more than a certain amount can cause a decrease in combustion performance. From this result, it can be found that critical mixing ratio of water in bunker A oil for normal combustion is 15% in this study. Deposition amount of soot that is collected in the vicinity of the chimney was decreased with increasing water mixing ratio.
Effects of Fuel Injection Timing on Performance in Old Marine Diesel Engine (Using M/S "Hae Rim" of Training Ship)
Lim, Jae-Keun ; Cho, Sang-Gon ; Lee, Ho-Heon ; Im, Hyung-Sup ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 525~530
DOI : 10.7837/kosomes.2013.19.5.525
In this study, the generator engine of training ship M/S "HAE RIM" of Kunsan National University which is being operated for 20 years was used in the experiment. The experiment was carried out under the engine speed of 1200rpm, then the load was varied 30 kW intervals from 0 to 90 kW and the injection timing was varied
CA intervals from BTDC
CA. In the case of advancing fuel injection timing from BTDC
CA, specific fuel consumption is decreased by 1.37%, NOx is increased by 11.59 %, soot is decreased by 23.5 % and
is decreased by 2.8 %. Accoring to the analysis of effects of fuel injection timing on combustion & exhaust emissions characteristics on an old marine diesel engine, it is proved that the optimum fuel injection timing is BTDC
faster than that of original injection timing.
Real Time Measurement of Exhaust Emissions from Main Engine using Training Ship
Choi, Jung-Sik ; Lee, Sang-Deuk ; Lee, Kyoung-Woo ; Chun, Kang-Woo ; Nam, Youn-Woo ; Yoon, Seok-Hun ; Choi, Jae-Hyuk ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 531~537
DOI : 10.7837/kosomes.2013.19.5.531
In this study, we conducted real-time measurement at the ship arrivals and departures at the port and at a constant speed of 150 rpm for exhaust emissions from a main engine installed on the training ship, HANBADA, of Korea Maritime University. The result showed that the concentration of nitrogen oxide was measured in the range of 800 ppm to 1,000 ppm at constant speed mode. On the other hand, the concentration of nitrogen oxide during ship arrivals and departures was significantly fluctuated between 210 ppm and 1,230 ppm. And, the concentration of carbon oxide at the arrivals and departures was also larger than that of at constant speed mode. These results show that the ship maneuvering skills to prevent a sudden load change of main engine at the arrivals and departures of ship is needed. Additionally, it means that the difference of exhaust emissions generated between the constant speed mode and the arrival/departure has to be considered when invented many technologies are adopted into the reduction technologies of air pollutants from ships.
Evaluation of Cavitation Characteristics for ALBC3 Alloy Coated with Ni-Cr Series Self Fluxing Alloy in Marine Environment
Lee, Seung-Jun ; Kim, Seong-Jong ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 538~544
DOI : 10.7837/kosomes.2013.19.5.538
In this study, cavitation characteristics of a thermal spray coating were evaluated in order to improve durability and cavitation resistance. For a coating material, a Ni-based self-fluxing alloy was thermal-sprayed over a ALBC3 alloy substrate and subsequently modified by heat treatment.The resulted self-fluxing coating layer had relatively high hardness compared to the base material, and thus would be expected to exhibit good durability. However, the cavitation characteristics were deteriorated due to the intrinsic porous structure of the coating. Therefore, it is essential to optimize heat treatment condition during thermal spraying coating process for self-fluxing alloy, and in this research the increase in heat treatment temperature is thought to increase the fluidity of B and Si in the self-fluxing alloy and to remove pores or defects, leading to the characteristics enhancement.
Effects of Shot Peening Time on Microstructure and Electrochemical Characteristics for Cu Alloy
Han, Min-Su ; Hyun, Koang-Yong ; Kim, Seong-Jong ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 545~551
DOI : 10.7837/kosomes.2013.19.5.545
In this study, shot peening technique was employed with shot peening time for durability improvement and surface modification of copper alloy to investigate the electrochemical characteristics and microstructural variations. As a result of shot peening, roughness was distributed over the surface, and homogenization phenomenon was observed with increasing shot peening time due to the enhancement of coverage. The results revealed that hardness increased for shot peened specimens and particularly 3.5 mins of shot-peening time represented a hardness improvement of 52 %, showing similar electrochemical characteristics to that of the un-peened surface.
An Algorithm for Optimized Accuracy Calculation of Hull Block Assembly
Noh, Jac-Kyou ;
Journal of the Korean Society of Marine Environment & Safety, volume 19, issue 5, 2013, Pages 552~560
DOI : 10.7837/kosomes.2013.19.5.552
In this paper, an optimization algorithm for the block assembly accuracy control assessment is proposed with consideration for the current block assembly process and accuracy control procedure used in the shipbuilding site. The objective function of the proposed algorithm consists of root mean square error of the distances between design and measured data of the other control points with respect to a specific point of the whole control points. The control points are divided into two groups: points on the control line and the other points. The grouped data are used as criteria for determining the combination of 6 degrees of freedom in the registration process when constituting constraints and calculating objective function. The optimization algorithm is developed by using combination of the sampling method and the point to point relation based modified ICP algorithm which has an allowable error check procedure that makes sure that error between design and measured point is under allowable error. According to the results from the application of the proposed algorithm with the design and measured data of two blocks data which are verified and validated by an expert in the shipbuilding site, it implies that the choice of whole control points as target points for the accuracy calculation shows better results than that of the control points on the control line as target points for the accuracy of the calculation and the best optimized result can be acquired from the accuracy calculation with a fixed point on the control line as the reference point of the registration.