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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
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Journal DOI :
The Korean Society of Marine Environment and safety
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Volume & Issues
Volume 17, Issue 4 - Dec 2011
Volume 17, Issue 3 - Sep 2011
Volume 17, Issue 2 - Jun 2011
Volume 17, Issue 1 - Mar 2011
Selecting the target year
Characteristics of Water Temperature and Salinity in the Bottol Bada, Yeosu during Summer in 2010
Cho, Eun-Seob ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 301~306
DOI : 10.7837/kosomes.2011.17.4.301
This study was determined to analysis the characteristics of water mass in the Bottol Bada, Yeosu in August, 2010 based on the data from the distribution of water temperature and salinity. Sampling was carried out a total of three times (i.e. July 29, August 13, and August 30, 2010) and performed at three stations. Observation was done during the period of time 10:00-15:00, indicating the decreasing tidal height and turn of tide. In July 29, thermocline was found at 4 m in St. 1, but the stratification did not observe in August 13 and August 30. The remarkable water temperature between surface and bottom was found in St. 2 and St. 3, whereas St. 1 did not find. A particular finding during this study showed a cold water mass at bottom layer from St. 2 and St. 3, which was first occurred in July 29 and persisted in August 30 without any of destruction. Water temperature had a remarkable fluctuation between surface and bottom, whereas salinity had a unique in St. 1. St. 2 and St. 3 showed the increasing salinity according to water depth in August 13 and August 30. Transparency had considerable fluctuations in St. 1 and St. 3 depending to sampling date, but St. 2 did not fluctuate. Consequently, the Bottol Bada had a significantly different water mass between inner and outer waters. Furthermore, strong irradiance and weak wind play an important role in developing the stratification between surface and bottom, in particular the introduction of offshore waters contribute to highly developing the stratification in the Bottol Bada during the period of August in 2010.
The Application of Unmanned Aerial Photograpy for Effective Monitoring of Marine Debris
Jang, Seon-Woong ; Lee, Seong-Kyu ; Oh, Seung-Yeol ; Kim, Dae-Hyun ; Yoon, Hong-Joo ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 307~314
DOI : 10.7837/kosomes.2011.17.4.307
This study proposed detection method of Marine debris using unmanned aerial photography. For unmanned aerial photography, a RC(Radio Control) helicopter which has good movability and economics was used. To a camera mounting, a gimbal equipment was attached to the bottom of the RC helicopter. The gimbal equipment is very useful because it is not seriously affected by vibration and rolling. In addition, we invented that digital image processing algorithm using Matlab program for detection of marine debris from photographs. Particularly, background subtraction in invented algorithm was applied. As a result, marine debris of a variety of forms from different sand states of coast were reliably detected. In the future, monitoring using proposed method was expected to contribute that the solution to representative problem of monitoring area selecting and estimate the total litter mass over the beach. Moreover, It is considered a greater application possibility to marine environmental observations.
Estimation of Ecological Carrying Capacity for Oyster Culture by Ecological Indicator in Geoje-Hansan Bay
Lee, Won-Chan ; Cho, Yoon-Sik ; Hong, Sok-Jin ; Kim, Hyung-Chul ; Kim, Jeong-Bae ; Lee, Suk-Mo ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 315~322
DOI : 10.7837/kosomes.2011.17.4.315
The importance of aquafarming is increasing all over the world, however the coastal environment in the semi-closed inner bay has been aggravated due to the long term production and the high stocking density. For the sustainable aquafarming, there is a requirement for a eco-friendly fishery management by the estimation of ecological carrying capacity. The model development and application is still in the initial step, because it has to consider the whole ecosystem and all culture activities. As an alternative, there is a requirement for ecological indicator to assess the ecological performance. This study tried the estimation of ecological carrying capacity using ecological indicator. The production and the facility of the oyster farms was 4,935M/T,
in Geoje-Hansan Bay(2008). Filtration pressure indicator was 0.203 which could provide a guidance on the present level of culture development. According to the environmental characteristics and the present oyster farms in Geoje-Hansan Bay, the newly assessed filtration pressure for the acceptable ecological carrying capacity was 0.102. Consequently, ecological carrying capacity in Geoje-Hansan Bay was 2,480M/T,
and this represents the level of culture that can be introduced into Geoje-Hansan Bay without leading to significant changes to ecological process, species, populations or communities. Our study utilized the ecological indicator to estimate ecological carrying capacity of oyster farming for sustainable productivity and this could be the scientific basis for the eco-friendly fishery management.
The study On An Yacht Moorings Establishment Location Analysis Using Optimum Spiral Method
Park, Sung-Hyeon ; Joo, Ki-See ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 323~329
DOI : 10.7837/kosomes.2011.17.4.323
This study is to determine an optimal yacht mooring location candidate among many alternative candidates in order to obtain the maximized efficiency under the natural conditions using integer programming. To deal with marina's construction location, the optimal construction location is selected using 21 important factors analysis for 4 candidates in the Mokpo city. The development period and the initial investment cost weight are one and half times more than the others among 21 factors. The optimal spiral analysis of weighted linear model shows that the Peace Square sea area is selected as the most optimal place among 4 candidates. This proposed model has not been applied in the optimal marina's facility candidate selection problem yet. This paper will contribute to determine the most reasonable alternative. Also, this proposal model can be applied to other marina's facility candidate selection problem in other regions.
Study on the Retreatment Techniques for NOAA Sea Surface Temperature Imagery
Kim, Sang-Woo ; Kang, Yong-Q. ; Ahn, Ji-Sook ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 331~337
DOI : 10.7837/kosomes.2011.17.4.331
We described for the production of cloud-free satellite sea surface temperature(SST) data around Northeast Asian using NOAA AVHRR(Advanced Very High Resolution Radiometer) SST data during 1990-2005. As a result of Markov model, it was found that the value of Markov coefficient in the strong current region such as Kuroshio region showed smaller than that in the weak current. The variations of average SST and regional difference of seasonal day-to-day SST in spring and fall were larger than those in summer and winter. In particular, the distribution of the regional difference appeared large in the vicinity of continental in spring and fall. The difference of seasonal day-to-day SST was also small in Kuroshio region and southern part of East Sea due to the heat advection by warm currents.
A Numerical Prediction of Residence Time According to Freshwater Influx in Enclosed Bay
Kim, Jin-Ho ; Lee, In-Cheol ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 339~343
DOI : 10.7837/kosomes.2011.17.4.339
This study is to examine the effect of freshwater influx on residence time to understand a long-term material transportation in enclosed bay. To predict the residence times of the coastal water in Masan bay, we were carried out the numerical simulations by using a EFDC model to simulate seawater circulation and particle tracking. The average residence times of Masan bay obtained from the particle release simulations under the condition to neglect a freshwater influx were estimated to be about 110 days in northern part of the bay to near Dotseom, 40 days in around Modo and 20 days in Budo to open sea. However, the average residence times under the condition consider with freshwater influx decreased about 81 days in both Region 1(northen Masan bay to near Dotseom) and Region II (Dotseom to Modo), but the Region III(Modo to Budo) and Region IV(Budo to open sea) incresed about 58 days and 17 days, respectively.
Assessment of Permissible Inflow Load for Water Quality Management in Yeoja Bay, Korea
Kim, Hyung-Chul ; Lee, Won-Chan ; Kim, Jong-Gu ; Hong, Sok-Jin ; Kim, Kyoung-Mi ; Cho, Yoon-Sik ; Park, Sung-Eun ; Kim, Jin-Ho ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 345~356
DOI : 10.7837/kosomes.2011.17.4.345
Based on the consideration of land based pollutant discharges from the basin and seawater quality related carrying capacity and the seawater quality improvement in receiving water bodies of Yeoja Bay where eutrophication and organic pollution are in progress, were evaluated. The permissible inflow loads of BOD, TN and TP by using the geographical features and box modelling method were estimated. As results, it is shown that the reduction rate of discharged BOD and TP loads were 39.3% and 30.8 %, respectively, however, 6.9% was estimated for TN. According to the pollutant loading in each tributary and generated load of the basin, it is given much weight on the land use group, and also was shown in discharged load estimation. This suggests that it is important to control nonpoint source pollutant such as livestock and land use groups as well as point source to contribute the proposition of the water quality improvement plan according to the characteristics of the bay.
The Variation of the Dissolved Inorganic Nutrients in the Costal Area of Gunsan, Yellow Sea from 2001 to 2010
Heo, Seung ; Kweon, Jung-Ro ; Park, Jong-Soo ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 357~365
DOI : 10.7837/kosomes.2011.17.4.357
The variation of the dissolved inorganic nutrients were investigated four times per year in the costal area of Gunsan, Yellow Sea from 2001 to 2010. Water samples were collected at 10 stations and phsico-chemical parameters were analyzed including water temperature, salinity, suspended solids, dissolved oxygen, chemical oxygen demand, chlorophyll a and dissolved inorganic nutrients. The average of dissolved inorganic nitrogen(DIN) for ten years at Gunsan area showed similar concentration between surface and bottom. The average of DIN at surface was 0.421mg/L (0.198~0.846mg/L) and bottom was 0.344mg/L(0.148~0.717mg/L). The highest value of annual average of DIN at surface was 0.846mg/L in 2002 and the lowest value was 0.198mg/L in 2010. The percentage of ammonia, nitrite and nitrate for the average DIN of 10 years showed 27%, 3% and 70% which showed most of DIN was nitrate. Dissolved inorganic phosphate(DIP) for ten years at Gunsan area showed similar concentration between surface and bottom and DIP was decreasing from 2003 to 2010. The average of DIP of 10 years was 0.024mg/L and annual average 0.021mg/L in 2008, 0.007mg/L in 2009 and 0.008mg/L in 2010 which showed decreasing pattern from 2007 to 2010. The average of DIN/DIP ratio from 2002 to 2010 was 6.0(3.2~10.1) at surface and 4.6(2.6~7.0) at bottom. The average value of dissolved inorganic silicate from 2004 to 2010 showed 0.372mg/L at surface layer and 0.352mg/L at bottom layer and was on decreased from 2006 to 2010. The Spearman's correlation analysis was carried out to knowrelation among the salinity and dissolved inorganic nutrients at the surface and bottom layer. The correlation factor of DIN was -0.72, DIP was -0.46 and dissolved inorganic silicate was -0.63 at surface layer and DIN was -0.70, DIP was -0.44 and dissolved inorganic silicate was -0.57 at bottom layer. The dissolved inorganic nutrients at the nearshore of Gunsan was affected from the freshwater discharge of Geum river. Especially, a lot of DIN flowed into the nearshore of Gunsan from Guem river. The concentration of dissolved inorganic nutrients at Gunsan showed high at station 1, 2 and 3 and there was a little concentration differences according to the cruise time. The concentration of dissolved inorganic nutrients showed high value at the station 1, 2, 3 which exist nearshore of Gunsan city and it means these stations mainly affected by Geum river and Gunsan city. The annual average of dissolved inorganic nutrients showed gradually decreased from 2003 to 2010 and we need more research on this conditions.
Biological Properties of Common Squid in the Yellow Sea of Korea
Choi, Kwang-Ho ; Kwon, Dae-Hyeon ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 367~373
DOI : 10.7837/kosomes.2011.17.4.367
We investigated the biological characteristics of the squid, Todarodes pacificus Steenstrup through the samples caught monthly in the Yellow Sea(
) from 1985 to 1987. Monthly mantle length frequency were separated into Autumn spawning group and winter spawning group with Tanaka's method(1956) to determine the main group of the squids caught in the Yellow Sea. The ratio of winter spawning group was higher than that of autumn spawning group. Monthly gonadosomatic index of females increased on July in 1985, on October in 1986, and October in 1987 and decreased later in each year. That of males increased on June in 1985, on July in 1986, and June in 1987. The length of 50% group maturity of female was 20.7 cm mantle length(ML) in 1985, 17.9 cm ML in 1986, and 17.2 cm ML in 1987. The ratio of female was higher than that of male in the group over 24 cm ML, and the ratio of male was higher than that of female in the group under 24 cm ML. We concluded that the length of 50% group maturity of squids was affected by the density of the population status.
A Study on Development of Operational System for Oil Spill Prediction Model
Kim, Hye-Jin ; Lee, Moon-Jin ; Oh, Se-Woong ; Kang, Joon-Mook ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 375~382
DOI : 10.7837/kosomes.2011.17.4.375
There is no system to obtain the basic data and proceed data and user input interface is complex, thus there are some limitation to utilize the oil spill prediction model. It is difficult to build the scientific response strategy in order to respond oil spill accident rapidly because it is impossible to operate the oil spill prediction model any time. In this study, the optimum operational system for oil spil prediction model has been developed considering the present system. External real time data has been linked because of impossibility of building all basic data and minimum database has been build in this study. Through this data system, real time oil spill prediction model can be utilized. And the user interface has been designed to reduce the error of the interface between user and model and the output interface has been proposed to analyze the result of modeling at multidimensional aspect. While the system for oil spill prediction model as the result of this study has some uncertainties because of depending on external data, the thing that we can predict oil spill using operate the model rapidly as soon as the accident occurred can be meaning in the response field.
A Study on Ship's Maneuverability Evaluation by Real Ship Test
Im, Nam-Kyun ; Han, Song-Hee ; Nguyen, Thanh Nhat Lai ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 383~389
DOI : 10.7837/kosomes.2011.17.4.383
At the design stage, it is very important to know the ship maneuvering characteristics from the view point of ship performance and for the safety of navigation. IMO only gives some criteria for ships in full load even keel condition. However, the ship generally is operated not only in full load condition but also in half load condition or ballast condition. Therefore we must estimate the ship maneuvering in different loading condition to ensure that the ship will satisfy with IMO rules and navigate safely in every condition. In this paper, we have investigated the maneuvering characteristics of a ship by simulation and experiments with real ship. By comparing with the results of simulation, the real ship tests conform with simulation test and previous researches. Therefore, the method base on real data is well done to estimate the ship maneuvering in different loading conditions. The change of ship's manoeuverability accoriding to ship's operation conditions was estimated.
A Study on Adequacy of Audit Techniques and Advancement of Ship-Handling Simulation for Maritime Safety Audit
Lee, Yun-Sok ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 391~398
DOI : 10.7837/kosomes.2011.17.4.391
SHS(Ship-Handling Simulator) is virtual generation of vessel traffic situation under various environmental conditions. Recent, with the introduction of MSA(Maritime Safety Audit), SHS is being used as a key facility to determine the safety of navigation. However, the current audit techniques specified in the implementation guidance of MSA have been prepared by generalizing common procedures and evaluation methods used by institutions operating simulator systems. Therefore, they need to be reviewed and supplemented. This study analyzed the adequacy of current audit techniques based on the limitations and problems, then suggested the advanced scheme of SHS such as standardization of ship models, standard manoeuvring and evaluation method. The results of this research will contribute to improving the quantification and reliability of audit techniques used in the MSA as well as upgrading of the simulator system.
A Study on the Present Status and Future Directions of Maritime Safety Audit
Cho, Ik-Soon ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 399~405
DOI : 10.7837/kosomes.2011.17.4.399
Recently, the navigation risk is increasing significantly with growth of marine traffic volume and construction of marine facilities, water bridges, port development and marine wind farm etc. To reduce this kinds of risk, Ministry of Land, Transport and Maritime Affairs enacted a new law called MSA(Maritime Safety Audit) as a comprehensive maritime traffic safety management scheme in order to ensure safety improvements from the early planning stage to post managing of the development which affect the maritime traffic environment. MSA as a tool for improving maritime traffic safety is a formal safety assessment in the existing or future ship's fairway by an independent audit team. It examines the potential hazards of maritime traffic safety, if necessary, and is to ensure the implementation of appropriate safety measures. The object of this paper is to comprehensively evaluate the achievements and implementation problems of MSA about the 2 years, to define the fundamental problems of MSA by conceptualizing and analyzing MSA limits. MSA requires further examination about the introduction of screening and scoping in order to increase the efficiency and objectivity. It will be required the measures concerning policies directions as a tool for planning process for project owner. It will lead to right understanding concerning audit scheme and used in various ways such as amendments to related law.
A Study on Improvement of KMA WE-FAX Service
Yun, Jong-Hwui ; Cook, Sung-Gi ; Seol, Dong-Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 407~412
DOI : 10.7837/kosomes.2011.17.4.407
Even though KMA(Korea Meteorological Administration) has been doing WE-FAX service in past 40 years, most of korean ship's officers use Japan/USA WE-FAX instead of KMA WE-FAX during passage in the NW Pacific. In this regards, the authors carry out the research on the improvement of KMA WE-FAX service, examining the officers's opinions to KMA WE-FAX service along with comparing Korea, Japan & USA synoptic weather charts. As a result, it is suggested that (1) Have KMA WE-FAX service known to the officers in the course of education and training, (2) Persuade ocean-going ships to participate VOS to provide more accurate weather charts. (3) Provide additional weather charts such as Wave analysis, Surface forecast and put useful weather informations on weather charts to enhance navigational safety.
A Study on the Performance Characteristics of the High Temperature Heat Storage Tank using MgO Materials
Cho, So-Ang ; Shin, Chang-Hoon ; Lee, Su-Sang ; Yoon, Seok-Hoon ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 413~418
DOI : 10.7837/kosomes.2011.17.4.413
The global warming by abuse of fossil fuel is going to become an important problem which must be solved by human beings. This research is to develop a high temperature heat storage tank with high efficiency and to investigate the performance characteristics of this tank to help these energy problem. But the researches for this area have not been enough until now and specially the researches for high temperature heat storage tank are very few. For this research, heat storage bricks were made using MgO powder and studied about the performance characteristics of high temperature heat storage tank by experimental method. Through this research, it was confirmed that MgO can be used as a heat storage material for high temperature range.
A CFD Analysis Study on the Characteristics of Hydrogen Production by High Temperature Steam Electrolysis(HTSE) Using High Temperature Heat
Han, Won-Hui ; Choi, Jung-Sik ; Yoon, Seok-Hun ; Yoon, Doo-Ho ; Choi, Jae-Hyuk ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 419~427
DOI : 10.7837/kosomes.2011.17.4.419
The characteristics for hydrogen production and the thermochemical properties of high temperature steam electrolysis(HTSE) device have been numerically analyzed in a two-dimension, steady-state with using the COMSOL
. The main parameters for the calculation are applied voltage, ASR(Area-specific Resistance), temperature and pressure of the inlet gas flow. The results showed that thermal-neutral voltage was 1.2454 V and rather than the cell temperature increases or decreases with increasing applied voltage by thermal-neutral voltage starting this voltage the temperature in high voltage tended to rise and temperature in the low voltage tended to fall. And with, increasing the values of ASR, temperature inside the cell and the hydrogen production rate were decreased.
A Study on the Condensation Prevention of Bulk Carrier
Oh, Sae-Gin ; Kim, Won-Ouk ; Kim, Seung-Hwan ; Lee, Seung-Geun ; Kim, Jong-Su ;
Journal of the Korean Society of Marine Environment & Safety, volume 17, issue 4, 2011, Pages 429~434
DOI : 10.7837/kosomes.2011.17.4.429
Bulk cargo loaded into ship can be damaged by various kinds reasons. This paper aims to analyze about cargo damage of coil carrier ship due to condensation. Condensation is the formation of liquid drops of water from water vapor. Condensation consists of small drops of water which form when warm water vapour or steam touches a cold surface such as a window. In general, condensation have occurred by temperature difference at large building and ship's tank. It is phenomenon that can occur often to oceangoing vessel moving temperature difference places in similar time. This paper proposes a new method using dehumidification device and fan heater to prevent bulk cargo damage of coil carrier ship from condensation.