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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 9, Issue 4 - Nov 2006
Volume 9, Issue 3 - Aug 2006
Volume 9, Issue 2 - May 2006
Volume 9, Issue 1 - Feb 2006
Selecting the target year
Survey of Responses Regarding the Development of Fishing Village and Port in the Busan Region
Kim Yeong-Pyo ; Yoon Han-Sam ; Kim Heon-Tae ; Ryu Cheong-Ro ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 65~71
This study evaluated the results of a questionnaire survey taken by visitors and residents likely to be directly or indirectly affected by a proposed fishing village and port development in the Busan region. The questionnaire focused on various potential effects that the development would have on the local community and on ways to improve the development process, as well as on the priorities of such investment and the direction the development should take. Our goal was to determine the sentiments of the local citizenry regarding the proposed fishing village and port development in the Busan region.
Anaerobic Digestion Fish Offal(I): Effect of Reactor Configuration and Sludge Bed Fluidization on Start-up of Digester
Jeong Byung-Gon ; Kim Byung-Hyo ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 72~78
Effect of organic loading rate on digester performance was evaluated under the conditions of same surface area/reactor volume ratio and different reactor diameter. At the low loading rate of
, high rate of organic removal could be obtained regardless of reactor diameter. It can be estimated that reactor configuration can not affect reactor performance at the low loading rate. However, different performance depending on reactor diameter was observed at the organic loading rate of
. That is, volatile acid accumulation and low COD removal efficiency was observed in reactor having 6.4 cm diameter, while volatile acid was not accumulated at all and high COD removal efficiency was observed in reactor having 3 cm diameter. Such a difference of reactor performance depending on reactor diameter can be explained that sludge bed can be fluidized by evolved gas bubble in narrow reactor while sludge bed can not be fluidized by evolved gas bubble only in wide reactor. At a high organic loading rate of
, it can be judged that there is no relation between reactor configuration and reactor performance because all reactors showed very low COD removal efficiencies regardless of reactor diameter. Sludge bed fluidization is one of the most important factors in achieving efficient start-up of anaerobic digester. Narrow and tall type reactor is favorable condition for making sludge bed fluidization at a constant surface area/reactor volume ratio. Thus, it can be judged that reactor configuration and sludge bed fluidization have great influence to reactor performance.
Turbulent Flow over 2-D Rectangular-Shaped Roughness Elements with Various Spacings(Part 1 : Time Averaged Flow)
Hyun B.S. ; Suh E.J. ; Kim M.R. ; Choi K.C. ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 79~84
The present study deals with the flow over a flat plate with repeated roughness elements of 2-dimensional rectangular shape, which can be applied into the study on the natural geographical roughness and the turbulent flow on roughened solid surface. Experiment was performed using PIV technique in the circulating water channel. Results showed that the flow over roughness elements was characterized by the high shear flow emanating from top of roughness element and the recirculating region formed at the trough of two roughness elements. In general, the ratio between the spacing and the height of roughness elements plays a crucial role in developing the flow pattern near wall surface.
Turbulent Flow over 2-D Rectangular-Shaped Roughness Elements with Various Spacings(Part 2 : Turbulence, Friction Velocity and Integral Parameters)
Hyun B.S. ; Suh E.J. ; Moon J.S. ; Kim G.W. ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 85~91
This study deals with the flow over a flat plate with repeated roughness elements of 2-dimensional rectangular shape, which can be applied into the study on the natural geographical roughness and the turbulent flow on roughened solid surface. Part 1 of the study showed that the ratio between the spacing and the height of roughness elements plays a crucial role in developing the flow pattern near wall surface. The present study complements the turbulence characteristics, the utilization of friction velocity as well as integral parameters. Results confirmed that k-type roughness(s/H=7 or 14) is certainly a more effective means than d-type roughness (s/H=3.5) in thickening the viscous region.
Effect of Stern Wedge on the Wave Making Resistance of Chine Hull Form
Lee Dae-Hoon ; Lew Jae-Moon ; Kang Dae-Sun ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 92~97
Hull forms of a high speed small boat have been developed through numerical studies. A round bilge type hull form has been drived form a using chine hull form with HCAD, a hull form variation software. Wave resistance and the flow fields around the ships have been computed using well-known software, WAVIS. This software employs Rankine source method with non-linear tree surface condition as well as dry transom boundary conditions. The round bilge hull form showed better resistance performance than to the chine hull form for the whole speed range. However, considering the building and labor costs of the small shipyard, the chine hull form has been selected and its wave resistance characteristics has been improved by modifying the bow regions and applying the stem wedge. It is found that the effect of stem wedge is quite satisfactory to improve the resistance characteristics of high speed chine hull form.
A Study of Multi Hull Form Design for Small Leisure Fishing Vessels
Lee Seung-Hee ; Lee Young-Gill ; Kang Dae-Sun ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 98~108
The vessels, already built and is operating in Korea, have the hull form of catamaran, with LOA(Length Over All) 15 m, LBP(Length Between Perpendiculars) 12 m, GT(Gross Tonnage) 9.77ton, Light Load Displacement 15.1ton. Korean Society of Ship Inspection & Technology, Chungnam National University, Inha University, Seoul National University and Advance Marine Tech co. ltd developed by cooperation it for fishing vessels. And it used FRP(Fiber Reinforced Plastics) for hull material and main engine of diesel
with a water jet system. Based on these results, this paper describe small leisure fishing vessels with multi-hull, in relation to the project of CTYS(Regional Reserch Center for Transportation System of Yellow Sea Inha University) that aimed to development of trimaran hull form(LOA=17m, LBP=14m(Side Hull=6m), GT=9.77ton, Light Weight=11.2 ton).
The Effect of Enhanced Zooplankton on the Temporal Variation of Plankton in a Mesocosm
Kang Jung-Hoon ; Kim Woong-Seo ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 109~119
This study investigated the effect of artificially enhanced mesozooplankton on the phytoplankton dynamics during fall blooming period using a mesocosm in Jangmok bay located in the Southern Sea of Korea in 2001. The four bags with 2,500 liter seawater containment were directly filled with the ambient water. And then, abundances of mesozooplankton in two experimental bags were treated 6 times higher than those in control bags by towing with net(
) through the ambient water. Phytoplankton community between control and experimental bags were not significantly different in terms of chlorophyll-a(chl-a) concentration and standing crop (one-way ANOVA, p>0.05) during the study period. Initial high standing crop and chl-a concentration of phytoplankton drastically decreased and remained low until the end of the experiment in all bags. Diatoms, accounting for most of the phytoplankton community, consisted of Skeletonema costatum, Pseudo-nitzschia seriata, Chaetoceros curvisetus, Ch. debilis, Cerataulina pelagica, Thalassiosira pacifica, Cylindrotheca closterium, and Leptocylindrus danicus. Noctiluca scintillans dominated the temporal variation of mesozooplankton abundances, which peaked on Day 10 in the control and experimental bags, while the next dominant copepods showed their peak on Day 7. Shortly after mesozooplankton addition, copepod abundance in the experimental bags was obviously higher than that in the control bags on Day 1, however, it became similar to that in the control bags during the remnant period. It was supported by the higher abundance and length of both ctenophores and hydromedusae in experimental bags relative to the control bags. However, the cascading trophic effect, commonly leading to re-increase of phytoplankton abundance, was not found in the experimental bags, indicating that copepods were not able to control the phytoplankton in the bags based on the low grazing rate of Acartia erythraea. Besides that, rapidly sunken diatoms in the absence of natural turbulence as well as N-limited condition likely contributed the no occurrence of re-increased phytoplankton in the experimental bags.
Marine Environment Protection in Northeast Asia and NOWPAP: Achievements and Challenges
Chung Suh-Yong ;
Journal of the Korean Society for Marine Environment & Energy, volume 9, issue 2, 2006, Pages 120~129
This paper aims at investigating the developments and challenges of Northwest Pacific Action Plan (NOWPAP), a regional cooperation mechanism to protect marine environment in Northeast Asia. As one of 16 UNEP's Regional Seas Program, NOWPAP has evolved since its inception in 1994. Based on the belief that a cooperative institution may work more efficiently to address common regional concerns on marine environment, China, Japan, Russia and South Korea have developed NOWPAP under the UNEP's leadership. NOWPAP now has its own independent secretariat, and 4 regional activity centers while expanding its partnership with other institutions. However, NOWPAP must address several challenges that it now faces for better achievement of its goals. They include consideration of unique geopolitical situation in this region, participation of North Korea, incorporation of sustainable development concept in its activities, reconsideration of equal opportunity principle for more efficient cooperation, and securing sufficient financial resources.