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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 16, Issue 4 - Dec 2010
Volume 16, Issue 3 - Sep 2010
Volume 16, Issue 2 - Jun 2010
Volume 16, Issue 1 - Mar 2010
Selecting the target year
Distribution of Zooplankton by ADCP's Echo Intensity in the Coastal Water used Yellow Loess
Park, Ju-Sam ; Choo, Hyo-Sang ; Moon, Sung-Ryong ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 141~151
Harmful algal blooms (HABs), commonly known as red tides, are aquatic phenomena caused by the rapid growth and accumulation of certain microalgae, which can lead to marked discoloration of surface waters, and severe impacts on public health, commerce, and the environment. In South Korea, the red tides have been a serious and recurrent problem, especially along the south coast. Plenty of yellow loess was used to control an outbreak of the red tides for 15 years from 1996 until now. Yellow loess was almost sprayed in the vicinity of a large fish farming industry. In this research, the distribution characteristics and density distribution of zooplankton were investigated in autumn (Oct. 2008) and spring (Apr. 2009) using volume backscattering strength (SV) calculated by the zooplankton collected with north pacific standard (NORPAC) net and the echo intensity measured with ADCP at stations on the study area in the spraying ocean of yellow loess (SOYL), and the non-spraying ocean of yellow ocean (NOYL) by the red tide generating every year. The species number and the individuals per unit volume of the zooplankton collected in NOYL was high and it which was collected in SOYL was low. As a result of comparing the volume backscattering strength (
) calculated by species and length of the zooplankton collected with NORPAC net with the volume backscattering strength (
) calculated by the echo intensity measured with ADCP at stations on the study area, although
of NOYL were generally in agreement,
of SOYL was higher than
4.3dB, i.e. ADCP is greatly influenced by suspended solid in SOYL. The horizontal distribution map of
at the study area in autumn (Oct. 2008) and spring (Apr. 2009) was drawn.
of SOYL is higher than NOYL and autumn is higher than spring.
can suppress the overestimate or underestimate of
Effect of Temperature on Catches of Anchovy and Sea Mustard(Undaria pinnatifida) in Southern Part of East Sea of Korea
Kim, Seong-Hyeon ; Kim, Dong-Sun ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 153~159
This study looked into changes in catches of anchovy and production of sea mustard(Undaria pinnatifida) in Southern part of East Sea in Korea from 1990 to 2007 out of the fishing industry production statistics of Korea from 1969 to 2007, and then examined the relationship between the productions and the sea temperature. The production of sea mustard(Undaria pinnatifida) decreased when the sea surface temperature was high, as it adversely affected its production, while its production increased when the sea surface temperature was low, as this facilitated its growth.
Spatiotemporal Variations of Coastal Sediment Transport at Barrier Islands in the Nakdong River Estuary
Jeon, Yong-Ho ; Yoon, Han-Sam ; Lee, Kyung-Seon ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 161~168
We conducted a field survey of the generation and development of the delta area of the Nakdong River estuary, Korea. To examine deposition and erosion of the barrier islands, we observed the spatiotemporal variations of sediment transport and quantitatively estimated the settling velocity of coastal sediment. For the field survey, we established two survey sites off the coasts of Jinu Island and Doyodeung, which had shown rapid variations in deposition and erosion. At these sites, we measured the net surface elevation change of the bottom level at approximately 1-month intervals. Main findings were summarized as follows. (1) Calculated daily deposition and erosion velocity during the observation period ranged from -1.39 to 3.56cm/day at Jinu Island and from -4.0 to 3.07cm/day at Doyodeung, respectively. (2) Although two typhoons passed by the study area during the observation period, the maximum net surface elevation was larger in October than during the passage of those typhoons.
Effects of Busan-Gimhae Precipitation Conditions on the Real Barrage Discharge in the Nakdong River Basin
Yoon, Han-Sam ; Yoon, Chang-Ho ; Yoo, Chang-Ill ; Park, Jung-Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 169~174
To obtain more accurate meteorological data for analyzing the river discharge characteristics at the Nakdong River Estuary, we investigated the characteristics of the release barrage discharge observed during the 13-year period from 1996 to 2008 and calculated the differences using meteorological data for the Busan and Gimhae weather stations. The river discharge estimated using a tank model was compared to the real river barrage discharge. We discussed the correlation between the discharge and the meteorological factors that affected the estuary water environment. This study found that total annual discharge from the Nakdong river basin for the 13 years was
/month. The largest monthly mean release discharge occurred in July at
/month (26.9% for the year), followed by August and September in that order with 22.0% and 18.9%, respectively.
Topographic Placement(Structure) and Macro Benthos Community in Winter for the Shellfish Farm of Namsung-ri, Goheung
Jo, Yeong-Hyun ; Kim, Yun ; Ryu, Cheong-Ro ; Lee, Kyeong-Sig ; Lee, In-Tae ; Yoon, Han-Sam ; Jun, Sue-Kyung ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 175~183
To understand the variation of macro benthos community according to the installation of structure and topographic placement in the shellfish farm on tidal flat, the practical example of the tidal shellfish growing area at Namsung-ri Goheung was observed. The results of the research for the field observation were summarized as follows. (1) The ground gradient of the shellfish farm was very flat below about
. The shellfish farm ground took the shape of
from the shoreline to the place of 150 m seawards, and the shape of
from there to the low tide line. During ebb tide, the
shape ground stored the sea water, and the
shape ground was supposed to act as the effect factor to leak slowly or to prevent the outflow. (2) The oyster shell bag or the type of riprap wall as the boundary in the shellfish farm was classified into five types. The air exposure time and flooding time were 181 and 434 minutes, respectively. (3) In the numerical experiment, the deep-sea water wave coming in the study area had 0.5 m of maximum wave height to show the very stable conditions and the wave direction pattern of S-direction was dominant at Naro great ridge, and SE, SSW and S-direction were distributed strongly around the shellfish farm. (4) By the grain size analysis, the sediment around tidal flat consisted of gravel 0.00~5.81(average 1.70)%, sand 14.15~18.39(average 13.23)%, silt 27.59~47.15(average 30.84)% and clay 35.79~55.73(average 36.19)%, and the sediment type was divided into (g)M(lightly gravelly mud), sM(sandy mud) and gM(gravelly mud) by Folk's diagram. (5) The macro benthos community survey conducted in this site in January, 2010 showed that 1 species of Mollusca, 8 species of Polychaeta and 2 species of Crustacea appeared, and 11 species occupying over 1% of total abundance were dominant.
Applicability of Boussinesq Models for Wave Deformation and Wave-Induced Current
Cho, Young-Jun ; Park, Il-Heum ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 185~193
In the present study, wave deformation and wave-induced current were calculated under the regular wave conditions using the Boussinesq model. The model results of the wave deformation showed good agreements with the preceeding laboratory experiments of others. The wave-induced current of the fully developed sea state was calculated. For field application of model, the preceeding field data by others in the real scale of the water area were compared, the numerical result of wave deformation showed a relatively good agreement with the field data. Although the numerical result of wave-induced current was underestimated over the longshore bar developed area, the Boussinesq model is generally suitable to predict the wave-induced current.
A Study on Internet based Simulator for Training VTS Operators
Lee, Jung-Jin ; Song, Chae-Uk ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 195~200
Basing on the recommendation and guideline of IALA, Korean VTS authority made an instruction about the training and qualification of VTS operators, and three model courses for training have been performed at a training institute which has one VTS simulator. However, the simulator has not been enough to make training fully satisfactory because of several signs of limitations including inaccurate method for calculating ship's movement and inconvenient location for training. In this paper, a new simulator was proposed to make up for the weak points replacing the current simulator. The proposed simulator adopts mathematical model for calculating exactly ship's movement which heightens the effect of training with simulator. And also it can be used through Internet so as to make long-distance training possible without visiting the training center. The effectiveness and the convenience of training with the proposed simulator are expected to be improved.
A Study on the Effects of Marine Accidents by Navigation Officers' Fatigue
Cho, Jun-Young ; Keum, Jong-Soo ; Jang, Woon-Jae ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 201~207
Recently, about 600 cases of marine accidents occur annually in Korea. According to many studies and analyses on occurrence of marine accidents, 70~80% of marine accidents were caused by human factors. Among the human factors, navigation officers' fatigue is very important factor. Although navigation officers' fatigue serves as an important role in marine accidents, there is no method to exactly examine the degree of officers' fatigue. Accordingly, this study analyzed human factors according to types of marine accidents and extracted important five factors affecting navigation officers' fatigue through the questionnaire survey by means of literatures and 5-point scale. In addition, evaluation factors of marine accident risks caused by fatigue factors were divided and structured by using ISM. Lastly, it found out the importance of each fatigue factor drawn by AHP and decided marine accidents that were most highly caused by navigation officers' fatigue in order. At the result, weights were high as sleep time 0.385, stress 0.302, health condition 0.139, rest time 0.099, alcohol and drug 0.074 in fatigue factors, and death and injury 0.328, collision 0.308, grounding 0.195, sinking 0.094, fire accident 0.075 in evaluation factors of marine accident risks. Therefore, the control plan to lower marine accident risks should be prepared on the basis of high weight factors.
A Study on the Improvement of Marine Traffic System in the Ulsan Approaching Waters
Jeong, Jae-Yong ; Yoon, Dae-Gwun ; Kim, Cheol-Seung ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 209~214
This study examined environmental condition, marine accidental data, marine traffic capacity and traffic flow, and fisheries zone status near Ulsan approaching water area. A questionnaire survey of marine traffic system was conducted on experts and users, and new plan was proposed. On the basis of the responses of experts and users to questionnaire, the essential factor of navigation danger and the essential factor of collision risk as well as the improvement plans were proposed. More efficient navigational fairway was set up through this study.
A Study on the Development of Fishing Vessels Safety Technology in Aceh Province of Indonesia for Korea's ODA
Kim, Kyong-Suk ; Jang, Eun-Kyu ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 215~221
Korea has recently joined the Development Assistance Committee (DAC) and currently implements a policy of vastly expanding the size of ODA. Indonesia has highly possessed growth potential in terms of vast quantity of natural resources, cheap labor force, and large local markets. Researches on how to support the Special Territory of Aceh province were made in this study. There is a necessity to increase the capacity of matter to the fishermen, and support facilities and infrastructure assistance to support the safety system in the sea.
A Comparative Study on Low-Carbon Port Management of Busan and LA/LB - On the Basis of Port Management Cost -
Cho, Dong-Oh ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 223~228
In the midst of worldwide response to climate change, the advanced ports including LA/LB(Los Angeles/Long Beach) has started to reduce carbon emission from port area which has not been targets of interests in the worldwide cooperation. Recently, the Port of Busan has started to reduce carbon emission from the port area under the Green Port Strategy in Korea. However, the low-carbon port management increases the cost of port management and negatively impacts the port competitiveness in the short term. Therefore, the Busan Port Authority is carrying out the low-carbon projects directly and has not transfer the cost to the port users, such as shipowers, cargo owners and terminal operators. However, the Port Authority of LA/LB has transferred the cost at low-carbon port management to customers of port. In this study, comparative analysis on cost of low-carbon port management at Busan and LA/LB is carried out for sustainable port management.
A Study on the Reduction of
Emissions and Operating Costs of the Ship in Port by Shore Electric Power
Han, Won-Hui ; Lim, Kyung-Sun ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 229~234
Recently, nations around the world are putting various efforts in many aspects to decrease greenhouse gases and international cooperation is urgently required. As part of these efforts, the shipping industry is working towords establishing "green parts" that reduce the carbon content of the greenhouse gases emitted in ports and can also decrease the operating costs. This study has tried to look for how to supply shore power instead of suppling ship's own generated power as a basic researches for reduction of carbon emissions and construction of "green parts" system. And in this paper, the training ship 'SAENURI' of Mokpo Maritime University under actual operation was selected to investigate for environmental and expense effects. The results of this study showed that
emissions Mere reduced 34% and operating costs Mere reduced approximately 31% in case of using the shore paper.
Design of the Driver of 7W Class LED Lamps as a Substitute for Incandescent Lamps
Park, Young-San ; Bae, Cherl-O ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 2, 2010, Pages 235~240
In order to substitute incandescent lamps, a power supply device for 7W class LED lamps which are environmentally friendly and energy saving is designed LED lamps consist of a multitude of chip LED connected in parallel and series. 11ms it is necessary to supply LED lamps with DC voltage and current. However, when LED lamps are in use, they are connected directly to AC 220V. This is why we need to have AC/DC, DC/DC power converters including a control system of voltage and current. For this, a transformerless and simple LED lamp driver is designed 조ich can control the current and output voltage for LED string of LED lamp.