• Title/Summary/Keyword: 목포해역

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Application of Tidal Computations for Mokpo Coastal Zone (목포해역에서의 조석모형 적용)

  • Oh, N.S.;Kang, J.H.
    • Journal of Korean Port Research
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    • v.12 no.1
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    • pp.105-111
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    • 1998
  • A horizontal 2-D model which includes the wetting-drying treatment technique in the intertidal zone is applied for the prediction of tidal changes. The flow model is applied to Mokpo coastal zone and verified by measurement data. Comparing computation results with observed values for the M2 tidal constituent, agreeable correspondence is detected. The validity of the model is also proven by applying it to such areas which have narrow width and rapid velocity, irregular topography and complex geometry. Thus, this model can be used as the compatible prediction model for the tidal change and pollutant transport due to the development of Mokpo coastal zone.

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Numerical Modeling of Cohesive Sediment Transport at Mokpo Coastal Zone (목포해역 점착성 퇴적물의 수송에 관한 수치모의)

  • Jung T.S.;Kim T.S.;Jeong D.K.
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.9 no.1
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    • pp.36-44
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    • 2006
  • Cohesive sediment transport in coastal region has been studied by numerical modeling. A finite element numerical model was setup to simulate hydrodynamics and sediment transport in the coastal region with complex topography. Only physical features of observed sediments has been used to determine erosion rates of bottom sediments together with the previous research results. The simulation results using the simply determined equation of erosion rates were compared with time variations of the observed SS concentration and showed good agreements. In conclusion, this method can be used to estimate transport of cohesive sediment conveniently.

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Inundation Simulation on a Vertical Dock Using Finite Element Storm Surge Model (유한요소 폭풍해일 모형을 이용한 직립안벽에 대한 범람모의)

  • Suh, Seung-Won;Lee, Hwa-Young
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.24 no.4
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    • pp.235-246
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    • 2012
  • Typhoon induced surge simulations are done to make an establishment of coastal disaster prevention plan. To apply efficient run-up and overtopping on vertical harbor docks, in which prevailing wet-dry scheme cannot be satisfied due to infinite steepness, an imaginary internal barrier concept introduced and analyzed. Before real application on the Mokpo harbor area, feasibility tests are done on an idealized simple geometry and as a result it is found that the moderate width of the barrier might be 1 m. The threshold value of the minimum wet depth $H_{min}$ for land area, which behaves sensitive role in inundation area and depth, depends on grid size. However it is revealed that 0.01 m is adequate value in this fine finite element with 10 m spacing. A hypothetical typhoon of 100 years return period in central pressure and maximum velocity is generated based on historical tracks. Simulation of possible inundation on Mokpo area is performed with asymmetrical vortex of hypothetical typhoon and wave coupling. Model results show general agreement in pattern compared to other's prediction, however possibility of inundation enlargement is expected in harbor area.

Rising Tendencies of both Tidal Elevation and Surge Level at the Southwestern Coast (서남해안의 해수면 상승과 해일고 증가 경향)

  • Kang, Ju-Whan;Park, Seon-Jung;Park, Min-Won
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.20 no.1
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    • pp.14-24
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    • 2008
  • Recently, rising tendency of high water level is detected at southwestern coast. The result of harmonic analysis shows increasing trend of mean sea level, decreasing trend of the amplitudes of semi-diurnal tidal constituents, and increase of Sa tidal constituent, therefore, additional increase of high water level at Summer season. It shows also that maximum surge level has increased greatly, according to the frequent visit of big typhoon such as RUSA and MAEMI. Considering the correspondence of Sa and typhoon period, namely July${\sim}$September, extraordinary high water level would be more probable. Especially, Mokpo and Jeju would be considered to have many chances of extraordinary high water level in the future.

A Study on the Construction of Coastal VTS in Mokpo Coastal Waters (목포연안에서의 연안VTS설치에 관한 연구)

  • Moon, Beom-Sik;Jong, Jae-Yong;Gug, Seung-Gi;Kim, Se-Won;Park, Jin-Soo
    • Journal of Navigation and Port Research
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    • v.26 no.3
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    • pp.261-268
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    • 2002
  • At recently, Oil spill accident of large size oiler that happen domestic and outside the country is occured to social impact us as well as economical damage in sea environment. Also, because spread extent of pollution accident is reaching harbor, bay and close water areas, as necessity that traffic control ships are sea place. VTS is changing to concept that control space is magnified gradually. Our country is operated to 14 harbors which is control center. But abroad is operating coastal VTS that do main waterway and coastals to authority dimension. Therefore, necessity that traffic density of ship manages high coastals and ship traffic of waterway to our country is risen. This paper is execute sea traffic survey at Mokop sea areas and sea casualty occurs. It proposal that coastal VTS center field of most suitable and position of radar site.

A Study on the Scope of Passenger Vessels and Dangerous Goods Carriers Subject to Maritime Traffic Safety Audits (해상교통안전진단 대상 여객선 및 위험화물운반선 범위에 관한 고찰)

  • Lee, Hong-Hoon;Kim, Sung-Cheol;Kim, Deug-Bong
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.23 no.7
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    • pp.767-774
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    • 2017
  • Maritime traffic safety audits (MTSA) were enacted in order to ensure marine traffic safety throughout changes or the construction of water facilities, port facilities, etc. After the introduction of MTSA, the scope of subject vessels was restricted to an LOA of more than 100 m or a maximum speed of more than 60 knots as of 2014. In this study, the scope of subject vessels was re-examined in comparison with specific marine traffic safety areas and tanker prohibited areas identified in the maritime safety act. Furthermore, the state of subject vessels and exception cases for MTSA were also analyzed. As a result of these analyses, MTSA were deemed necessary for dangerous goods carriers of more than 1,000 G/T in specific marine traffic safety areas and dangerous goods carriers of more than 794 G/T in tanker prohibited areas. Finally, the necessity of further review was suggested given the present scope of subject vessels.

Environmental Characteristics of Shore Pollution Source in Southern Part of Sinan, Jangsando area in the West Coast, Korea (서해 신안 장산 남부해역의 육상오염원 환경특성 분석)

  • Yoon, Hayan;Shin, Yongsik
    • Journal of Marine Life Science
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    • v.2 no.2
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    • pp.56-61
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    • 2017
  • This study examined the environmental characteristics of shore pollution sources in the southern part of the Sinan, Jangsando area in the West Coast of Korea. A shoreline survey of the watershed was conducted to identify the pollution sources and measure the water discharge rate and microbial hygiene of water and finally estimate the possible impact area of pollution. Forty five of pollution sources in total were identified and they were grouped into sewage (33), agriculture waste water (1) and waste water from inland fish farm (11). Nine among them were discharged into the seawater and discharge volume was 72,857~281,250 l/min. Fecal coliforms of St. 72 (sewage) and St. 74 (shrimp farm) were 490 MPN/100 ml and 49 MPN/100 ml and the impact zones of the pollution were 4,389 m and 1,900 m respectively.

Spatio-temporal Distributions of Macrobenthic Community on Subtidal Area around Mokpo, Korea (목포 주변 해역 조하대 저서동물 군집의 시 ${\cdot}$ 공간적 분포)

  • Lee, Jae-Hac;Choi, Jin-Woo;Park, Heung-Sik
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.5 no.2
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    • pp.169-176
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    • 2000
  • This study was carried out to clarify the spatial and temporal patterns of macrobenthic assemblages on the subtidal area around Mokpo, southwest of Korea. A total of 238 species and 663 ind./$m^{2}$ were collected. Polychaetes were the most abundant faunal group that comprised 88 species and had a mean density of 389 ind./$m^{2}$. In the semi-enclosed Youngsan River estuarine bay and neighbouring Mokpo Port area were composed of fine sediments with high organic content, and revealed large seasonal variations in the salinity of surface water and bottom dissolved oxygen in contrast to little seasonal changes in those parameters in the outer area. The study area was classified into four station groups by the cluster analysis; the harbor area, the offshore area, and the inner and outer estuarine bay. Two estuarine bay areas showed different species composition; the dominant species of inner bay were Tharyx sp., Poecilochaetus johnsoni, Heteromastus filiformis and other opportunistic species whereas those in the outer bay were Ruditapes philippinarum, Corophium sinense. From the environmental data and species composition of benthic community, the inner bay was characterized to have unstable benthic faunal assemblages, especially under the seasonal disturbance and receiving large amount of organic matter input and intermittant discharge of fresh water. The coastal developments around Mokpo city also seem to have stressed the subtidal communities spatio-temporally.

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Studies on Fish Distribution Characteristics Using a Scientific Echo Sounder in the Yellow Sea (음향조사에 의한 황해 주요어족생물의 분포특성에 관한 연구)

  • 황두진;신형효;강돈혁
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.38 no.2
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    • pp.140-148
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    • 2002
  • The primary goal of this study is to determine the distribution characteristics using a scientific echo sounder in the Yellow Sea west of South Korea. The survey was carried out between 33$^{\circ}$00'N~37$^{\circ}$00'N latitude and 124$^{\circ}$00'E~126$^{\circ}$00'E longitude during the months of May and August, 1999 and April, 2000. The ships used in this survey were the R/V Chung-kyeong(G/T 300) and R/V Dong-baek(G/T 1,050) of Yeosu National University. The results obtained are as follows : 1. From the oceanographic data the Yellow Sea were divided into three sea areas which were the western waters of Chejudo, Mokpo and Kunsan. The oceanographic conditions were different in each of these three areas and the western waters of Chejudo were higher about 1~5$^{\circ}C$ more than the western waters of Gunsan. Generally, thermoclines were presented clearly in all three areas, but more so in August than in May according to seasons. 2. The horizontal distribution of S$_{A}$(area backscattering coefficient per unit area) value is that the western sea waters of Chejudo area are higher than that of the western sea waters of Mokpo and Gunsan. 3. The vortical distribution of S$_{A}$ value varies with thermocline that the harder thermocline is, the higher the S$_{A}$ value is. 4. The S$_{A}$ values on the types of biomass distribution are different with frequency. At the 38kHz, the demersal schools have higher values than the pelagic schools. At the 120kHz, the pelagic schools have higher values than the demersal schools.