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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 14, Issue 4 - Nov 2011
Volume 14, Issue 3 - Aug 2011
Volume 14, Issue 2 - May 2011
Volume 14, Issue 1 - Feb 2011
Selecting the target year
The Policy Review and Water Quality Characteristics of National Fishing Harbors and Designated Ports in East Coast of Korea
Lee, Dae-In ; Kim, Gui-Young ; Moon, Ju-Hoon ; Eom, Ki-Hyuk ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 213~223
DOI : 10.7846/JKOSMEE.2011.14.4.213
The status and changes of water quality of national fishing harbors and designated ports in East Coast of Korea were analyzed to support establishment effective water environmental management. COD (Chemical Oxygen Demand) concentration was satisfied to designated water quality criteria in most areas, but TN (Total Nitrogen) and TP (Total Phosphorus) exceeded the criteria frequently. Also, peak concentration was summer in COD and SS (Suspended Solid), but winter in TP. Eutrophication index of Ganggu and Pohang (old) area were the highest. Pollution index by function of COD, TN, and TP of Ganggu, Pohang, Jumunjin, and Guryongpo was high with gradual increasing recently, on the contrary, that of Samcheok, Imwon, and Chuksan was decreased. Pollution index involving multi-indictors relation to organics and inorganics was necessary for water quality assessment. Designated water quality criteria needed to be improved because the criteria of Jukbyun and Chuksan was applied more strictly compared to the other regions although without difference of environmental characteristics. Furthermore, the criteria notified lately needed to be related to management pollutants from land-based sources. The continuous diagnosis and monitoring on sediment quality within the study area were necessary for prevention of water pollution and eco-friendly disposal of dredged sediment. Especially, monitoring of Designated Ports was implemented partially, however monitoring ratio of National Fishing Har-bors was 7% to whole part. Therefore, systematic and integrated environmental monitoring for ports and harbors with charge of national management was reestablished by strengthening and securing a legal basis.
Study on the Improvement of Ballast Water Risk Assessment of GloBallast
Lee, S.G. ; Kang, W.S. ; Kim, E.C. ; Shin, K.S. ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 224~229
DOI : 10.7846/JKOSMEE.2011.14.4.224
Recently, the management of the marine invasive alien species introduced by ballast water has come to the core as an urgent task. Because, hazardous organisms cause harmful effects on the ecosystem. Hazardous organisms also negatively affect fisheries, commercial shipping activities, and marine resources. In this regard, IMO used to operate GloBallast, Ballast Water Risk Assessment System, in order to manage the introduction of invasive species by ballast water. GloBallast is constructed to assess the relative risk due to the movement of ballast water between nations, using the volume and the number of times of ballast water discharge, the environmental similarity between ports, and the abundance of hazardous species as the main factors. According to the results of the demo-operation of GloBallast, it was found out that the environmental similarity factor had affected most highly the results of risk assessment. Therefore, in this study, the correlation between the main factors used in GloBallast risk assessment were re-examined, and some methods were suggested in order to reflect these main factors in the risk assessment more reasonable.
Study on Power Measurement and Comparison of Marine Current Turbine in a Towing Tank
Do, In-Rok ; Kim, Moon-Chan ; Lee, Seung-Ki ; Hyun, Beom-Soo ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 230~238
DOI : 10.7846/JKOSMEE.2011.14.4.230
The experimental study for the performances of 100 kW marine current turbines (Horizontal Axis Turbine) has been conducted with three cases of 700 mm diameter model in PNU 100 m towing tank. Three cases of impeller have been designed according to the variation of section configuration and tip shape. The model tests have been carried out at different speed of revolution to find out the scale effect (Reynolds number effect). The designed rake impeller was the best among them in the efficiency point of view especially at high Tip Speed Ratio (TSR). The present study is expected to be extended to conduct at high reynolds number as well as the computational study for the validation.
An Application Status and Consideration of System Improvement on the Sea Area Utilization Conference and Impact Assessment
Lee, Dae-In ; Kim, Gui-Young ; Jeon, Kyeong-Am ; Eom, Ki-Hyuk ; Yu, Jun ; Kim, Yeong-Tae ; Moon, Ju-Hoon ; Kam, Min-Jae ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 239~248
DOI : 10.7846/JKOSMEE.2011.14.4.239
This paper evaluated types and characteristics of development projects occurred in coastal area (Public Water) by analyzing an application status of Sea Area Utilization Conference System that effective protect and manage marine environment and ecosystem from various artificial utilization and development enforced in 2008. Also, system improvement for stable settlement and security of efficiency considering exposed problems during system enforcement were diagnosed. The number of Sea Area Utilization Conference (SAUC) performanced during the period of 2009-2010 was 3,705, which consisted of simple SAUC (87.0%), general SAUC (12.8%), and Sea Area Utilization Impact Assessment (SAUIC; 0.2%). The general SAUC was accomplished for Public Water reclamation (43.4%), seawater supply and drainage (17.5%), dredging sediment (5.5%), installation of port facilities (4.6%) and fishing harbor facilities (2.3%), and others (23.4%). Statements of Environmental Impact Assessment (EIA) were reviewed mainly for construction of port facilities (32.9%), followed by construction of industrial complex, development of tourism and leisure complex, road construction, and development of energy facilities. It would be necessary to strengthen effectiveness of the system, advertisement, and capability of conference and review agency, and to enhance confidence of marine EIA continuously, according to the increase of development projects, and diversity and enlargement of development types.
Variation in Residence Time and Water Exchange Rate by Release Time of Pollutants Over a Tidal Cycle in Masan Bay
Park, Sung-Eun ; Lee, Won-Chan ; Hong, Sok-Jin ; Kim, Hyung-Chul ; Kim, Jin-Ho ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 249~256
DOI : 10.7846/JKOSMEE.2011.14.4.249
Lagrangian particle transport model coupled with the EFDC have been performed to estimate the residence time and water exchange rate by release time of pollutants over a tidal cycle in Masan Bay. The modelled residence time for the whole bay was about 40 days, ranging from less than 20 days in the southern parts of Budo, to over 100 days in the upper parts of Somodo. The spatial difference of residence time was controlled by tidal residual currents and the distance to the bay channel. The area mean residence time during spring and neap tides was estimated to be about 36 days and 42 days, respectively. The time required for 30% exchange of water was calculated as ranging from 65 to 105 days by release time of pollutants.
Dissolved Nutrient Balance and Net Ecosystem Metabolism Using a Simple Box Model in Gamak Bay, Korea
Eom, Ki-Hyuk ; Lee, Won-Chan ; Park, Sung-Eun ; Hong, Sok-Jin ; Kim, Hyung-Chul ; Cho, Yoon-Sik ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 257~263
DOI : 10.7846/JKOSMEE.2011.14.4.257
The budgets of fresh water, salt and nutrients were estimated in order to clarify the characteristics of material cycle in the Gamak Bay in 2006 with Simple Box budget Model. Outflow volume of freshwater into system was approximately
. Inflow masses of DIP and DIN were approximately 397.0~1158 mole/day and 1750~8328 mole/day, respectively. The Source or sink of DIP was under the control of the variation of fresh water budget in the system. the mass balance and NEM was largely determined by flushing time of material.
Study on the Characteristics of Thrust and Torque for Partially Submerged Propeller
Park, H.G. ; Lee, T.G. ; Paik, K.J. ; Choi, S.H. ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 264~272
DOI : 10.7846/JKOSMEE.2011.14.4.264
Shipbuilders carry out the operation test to check the conditions of the main propulsion system and auxiliaries for moored vessel in the quoy before the sea trial. The estimation of the thrust and torque for the partially submerged propeller should be prepared to ensure the safety of mooring line and the ship. In this paper, the variations of the thrust and torque according to the shaft submergence and the propeller rotating speed in bollard pull condition are investigated with the model test and the numerical analysis. Based on these resaearch, the empirical formula representing the physical phenomena of the partially submerged propeller is derived and validated through comparison to measurement results of full-scale propellers under the quoy operation test.
Viscous Flow Analysis around a Wind Turbine Blade with End Plate and Rake
Kim, Ju-In ; Kim, Wu-Joan ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 273~279
DOI : 10.7846/JKOSMEE.2011.14.4.273
Turbulent flow analysis around a wind turbine blade was performed to evaluate the power performance of offshore wind turbine. Fluent package was utilized to solve the Reynolds-averaged Navier-Stokes equations in non-inertial rotating coordinates. The realizable k-
model was used for turbulence closure and the grid system combining structured and unstructured grids was generated. In the first, lift and drag forces of 2-D foil section were calculated and compared with existing experimental data for the validation. Then torque and thrust of the wind turbine blade having NACA 4-series sections were calculated with fixed pitch angle and rpm. Tip speed ratio was varied by changing wind speed. In the next, three kinds of end plate were attached at the tip of blade in order to increase the power of the wind turbine. Among them the end plate attached at the suction side of the blade was found to be most effective. Furthermore, performance analysis with tilt angle and rake was also performed.
Development of Hydrocarbon Oil Detection Sensor using the Swelling Property of Silicone Rubber
Oh, Sang-Woo ; Lee, Moon-Jin ; Choi, Hyeuk-Jin ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 280~286
DOI : 10.7846/JKOSMEE.2011.14.4.280
In this research, the oil detection method and the characteristic of sensor using the selective reaction of silicone rubber in response to hydrocarbon oil will be described. As a sensing principle, the swelling property of silicone rubber in response to hydrocarbon fuel is used, also a strain gauge is used to transduce the volume change to an electrical signal. The sensor core is manufactured with a strain gauge embedded in silicone rubber by the curing process and experiments for characteristics of sensor core with various oils were carried out. It is shown that the sensor core can be used as an oil spill detection sensor. Also, for the application to the sea area, a buoy type sensor platform is integrated with a sensor core and a strain amplifier and it is tested in the simulated oil spill condition. In this study, it is proven that the integrated sensor can be used for the detection of various oils.
A Study on the Estimation of the Deformation of Object under Hydrostatic Pressure Test Using Image Processing
Lee, S.G. ; Oh, S.W. ; Choi, H.J. ; Lee, S.H. ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 287~292
DOI : 10.7846/JKOSMEE.2011.14.4.287
To evaluate the pressure-resistant performance of underwater equipment, hyperbaric chamber test facility which can make the hydrostatic pressure is used. In this test, strain gage is generally applied to measure the strain of object under test is suitable for measuring a tiny deformation, but it can not measure a large deformation. Thus this paper suggests a method to estimate the over -order deformation of object under test by the image processing with the image acquired from underwater camera in the hydrostatic test. The main procedure of suggested method comprises the first step to find significant points by processing the image two dimensionally and the second step to estimate a deformation of object under test by tracking the motion of these points. If completing the remained research which is estimating the deformation and comparing it with a real one, it can be a method to measure the over -order deformation of object under test.
Consideration of Species-specific Risk Assessment Method of Ballast Water
Lee, S.G. ; Kang, W.S. ; Kim, E.C. ; Shin, K.S. ; Oh, J.H. ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 293~300
DOI : 10.7846/JKOSMEE.2011.14.4.293
Many countries of the world, including IMO, has noticed that foreign marine hazardous organisms, which were introduced by ballast water, have disturbed the marine ecosystem of its own nation, and posed a serious threat to human health and the value of environment and economy. Therefore, IMO has tried to manage the introduced species by assessing the risk of ballast water, and suggested three risk assessment methods, such as environmental matching risk assessment, speciesbiogeographical risk assessment, and species-specific risk assessment. In this thesis, species-specific risk assessment method was considered, and a risk assessment program established by applying it was described.
Analysis of Heating and Desalination Cycle Using Low Temperature Seawater
Lee, H.S. ; Lee, S.W. ; Jung, D.H. ; Moon, D.S. ; Kim, H.J. ;
Journal of the Korean Society for Marine Environment & Energy, volume 14, issue 4, 2011, Pages 301~306
DOI : 10.7846/JKOSMEE.2011.14.4.301
The paper presents an analysis of the heating cycle and discusses a desalination cycle that uses lowtemperature seawater. The basic heating cycle model is the heat pump cycle, and seawater desalination is usually performed by the indirect freezing desalination method. The low temperature of the seawater (below
) acts as the heat source of the evaporator. R-134a, R-1234yf, R-600a are used as working fluids. In the 2-stage compression cycle, the compressor's work decreased by about 15.6% from that in the 1-stage compression cycle. Further, the COP in the 2-stage cycle was 17.6% higher than that in the 1-stage cycle. In the indirect desalination cycle, the energy per unit fresh water productivity in the 2-stage cycle was 19.8% lower than that in the 1-stage cycle.