• Title/Summary/Keyword: port breakwater

Search Result 118, Processing Time 0.026 seconds

Effects on the Wave Heights in a Port Caused by the Phase Differences of the Left and Right Diffracted Waves Passing through a Detached Breakwater (이안제를 지나는 좌·우측 회절 파랑의 위상차가 항내 파고에 미치는 영향)

  • Kim, Tak Kyeom;Kwon, Kyong Hwan;Ryu, Ha Sang;Kim, Gyung Soo
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.28 no.6
    • /
    • pp.397-407
    • /
    • 2016
  • The traveling waves of the left and right of the detached breakwater are bent behind the detached breakwater by diffraction, causing phase interference, superimposed and propagated. If the direction of the waves becomes same and they head to the entrance of a port due to the geographical conditions, superimposed wave energy could influence inside of a port. In this study, we investigated the influence of the phase difference of the left and right diffraction waves generated according to the length of the detached breakwater on the wave heights in a port through numerical experiments when the detached breakwater at a port entrance is installed. From this result, it was confirmed that the wave heights in a port is increased or decreased by the influence of superimposed caused by the phase difference of the left and right diffraction waves due to the length of the detached breakwater.

A Study on the Wave Height Distribution around Oil-Buoy in front of Detached Breakwater (방파제 전면에 설치된 원유부이 주변해역의 파랑분포에 관한 연구)

  • 손창배;김창제;강성진
    • Journal of the Korean Institute of Navigation
    • /
    • v.25 no.4
    • /
    • pp.423-433
    • /
    • 2001
  • As a part of the development program of Ulsan Port, construction of detached breakwater is planned. In Ulsan Port, several oil-buoys exist. If the detached breakwaters have been constructed, these oil-buoys will be located within 1 km from the planned breakwaters. Construction of the breakwaters gives rise to changes of wave conditions on the sea areas, especially in front of the breakwater and it affects mooring of tankers, which supply oil to the oil-buoy In this study, in order to calculate standing wave distribution after construction of a breakwater, numerical model is proposed based on unsteady mild slope equation. Calculation is performed by testing different wave heights, directions and reflection coefficients of breakwater. In addition, the influence to working condition of tanker moored at the oil-buoy is evaluated by using measured wave conditions and calculated results.

  • PDF

Analysis of Effect on Seawater Flow Change and Circulation Inside Port Due to the Construction of South Breakwater and Weir at Gamcheon Port

  • Hong, Namseeg
    • Journal of Ocean Engineering and Technology
    • /
    • v.34 no.2
    • /
    • pp.136-146
    • /
    • 2020
  • In this study, numerical simulations are used to analyze the effect of the south breakwater and weir on seawater flow change and circulation within the Gamcheon port. Flow patterns in the eastern direction are particularly affected by the breakwater during the ebb tide and current velocity is slightly reduced by construction of the weir. Additionally, seawater circulation is reduced by both features. In order to increase seawater circulation, a seawater flux structure is needed on the west breakwater. A weir-type structure will be more efficient than a seawater flux culvert.

A Study on the Lateral Force Acting on a Ship in the adjacent Waterway of Busan and Gamcheon Breakwater (부산항과 감천항 방파제 인접 항로에서 선체에 작용하는 횡압류 현상에 관한 연구)

  • 이윤석;김철승;공길영
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2004.04a
    • /
    • pp.311-316
    • /
    • 2004
  • In order to secure the traffic safety especially in the entrance waterway of harbour, it is important that the breakwater and the port facilities should be designed properly considering ship-handling difficulty and traffic flow. In this study, the lateral force acting on ship hull under the external force(wind, current, wave) is investigated quantitatively for the container ship approaching to the Busan and Gamcheon breakwater. The relation of ship-handling difficulty to the breakwater and the arrangement of ship's routine are examined based on the lateral force under the external force. Some of reviews to secure traffic safety on the design of breakwater are discussed.

  • PDF

Analysis of Harbor Tranquility due to Port Expansion

  • Moon, SeungHyo;Lee, JoongWoo;Kwon, SeongMin;Song, HyunWoo
    • Journal of Navigation and Port Research
    • /
    • v.43 no.5
    • /
    • pp.320-327
    • /
    • 2019
  • This study examined the port expansion plan for the fishery port at the east coast of Korea, in accordance with permission conditions for coastal ports such as a limit on the cargo volume and passenger demand for the coastal tourism belt formation. The site was chosen as a municipal coastal port attracting the new ocean industry and building waterfront zone as a hub of new marine tourism. Two different numerical models (Swan and Bouss 2D) were used. Before applying to the target sea area, some numerical tests were conducted for the variation according to Bouss-2D's strong/weak and nonlinear technique compared to the irregular diffraction of semi-infinite breakwater with a theoretical solution. As a result, there was a difference in strong nonlinearity with breaking waves and it was necessary to experiment with a strong nonlinear analysis technique for the actual site. Two numerical models were applied to the fishery port site and the tranquility of some alternatives were analyzed. The numerical results show the most suitable plan was ALT-1, with satisfied harbor tranquility and reasonable economic sense. The extension of the east breakwater and enlarged turning basin of the F-Land plan have brought generally more stable harbor tranquility than the ALT-1. The result can be used as a reference for the port expansion plan in the future.

Numerical Analysis of Waves Profiles coming with Oblique Angle to Permeable Submerged Breakwater on the Porous Seabed

  • Kim, Nam-Hyeong;Woo, Su-Min
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2013.06a
    • /
    • pp.275-276
    • /
    • 2013
  • This analysis method is based on the wave pressure function with the continuity in the analytical region including fluid and porous structures. Wave profiles coming with oblique angle to permeable submerged breakwater on the porous seabed are computed numerically by using boundary element method. When compared with the existing results for the oblique incident wave, the results of this study show good agreement. The results indicate that wave profiles own high dependability regarding the change of oblique incident waves and permeable submerged breakwater on the porous seabed. Therefore, the analysis method of this study are estimated to be applied as an accurate numerical analysis referring to oblique incident waves and permeable submerged breakwater on the porous seabed in real sea environment.

  • PDF

A Study on the Drift Phenomenon of a Ship on the Waterway near the Breakwater of Busan and Gamcheon Port (부산항과 감천항 방파제 인접 항로에서 선체에 작용하는 횡압류 현상에 관한 연구)

  • Lee Yun-Sok;Kim Chol-Seong;Kong Gil-Young;Im Nam-Kyun;Lee Chung-Ro
    • Journal of Navigation and Port Research
    • /
    • v.29 no.1 s.97
    • /
    • pp.1-7
    • /
    • 2005
  • In order to secure the traffic safety especially in the entrance waterway of harbour, it is important that the breakwater and the port facilities should be designed properly considering ship-handling difficulty and traffic flow. In this study, the lateral force acting on ship hull under the external force(wind, current, wave) is investigated quantitatively for the container ship approaching to the Busan and Gamcheon breakwater. The relation of ship-handling difficulty to the breakwater and the arrangement of ship's routine are examined based on the lateral force under the external force. Some of reviews to secure traffic safety on the design of breakwater are discussed.

Effect of Water Quality Improvement by Seawater Exchange Breakwater Install (해수교환 방파제 설치에 따른 수질개선효과)

  • Han, Dong-Joon;Lee, Dal-Soo
    • Journal of environmental and Sanitary engineering
    • /
    • v.21 no.3 s.61
    • /
    • pp.61-72
    • /
    • 2006
  • This study was carried out for verification of efficiency of seawater exchange breakwater which was installed in joomoongin harbor for the first time in our country. The joomoongin harbor, where seawater exchange breakwater has been constructed, shows typical for fishery and tourist port city specifics of greatest pollutants discharge volume in spring and summer, when tourist inflow and fishery activity is most vigorous. On the East Sea seawater flux through seawater exchange breakwater for the smallest waves (up to 0.5 m) was found out to be $1,526-3,052m^3/day$. After construction of seawater exchange breakwater, Zone 1 and Zone 2 of stagnant water inside the port were found to be a lot improved. Zone 3, adjacent to outport area, was found to be lower comparing with Zone 1 and Zone 2. The results of statistical analysis show that comparing with water quality improvement effect before and after seawater exchange, water quality after installation of seawater exchange breakwater became much better, primarily because of physical change around the harbour.

A Study on Tranquility by the Development of New Type Floating Breakwater (신형식부방파제의 개발과 정온도에 관한 연구)

  • Lee, Hyun Jin;Kim, Do Sam;Shin, Moon Seup
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.25 no.3
    • /
    • pp.154-164
    • /
    • 2013
  • In this study, a new type floating breakwater was proposed to improve the capability of wave attenuation compared with the existing floating breakwater in Wonjun Port, which is located in Masan City, Korea. In order to develop the optimal design, many different configurations considering the shape and location of vertical barrier and horizontal plate were examined based on the shape of existing floating breakwaters in Wonjun and Tongyeong Port. The analytical and numerical results of the new type floating breakwater showed better performance in long-period wave attenuation than the existing floating breakwater in Wonjun. Therefore, the new type floating breakwater can improve harbor tranquility in Wonjun Port.

Numerical Analysis of Waves coming with Oblique Angle to Submerged Breakwater on the Porous Seabed (침투층 위의 잠제에 경사각을 가지고 입사하는 파랑의 수치해석)

  • Kim, Nam-Hyeong;Woo, Su-Min
    • Journal of Navigation and Port Research
    • /
    • v.37 no.3
    • /
    • pp.283-289
    • /
    • 2013
  • Wave profiles coming with oblique angle to trapezoidal submerged breakwater on the porous seabed are computed numerically by using a boundary element method. The analysis method is based on the wave pressure function with the continuity in the analytical region including fluid and structure. When compared with the existing results on the oblique incident wave, the results of this study show good agreement. The fluctuation of wave profiles is increased in the rear of the submerged breakwater due to the increase of the transmission coefficient, as the incident angle increases. In addition, in the case of the wave profiles passing over the submerged breakwater on porous seabed, it is able to verify that the attenuation of wave height occurs more significantly due to the wave energy dissipation than that of passing over the submerged breakwater on the impermeable seabed. The results indicate that wave profile own high dependability regarding the change of oblique incident waves and porous seabed. Therefore, the results of this study are estimated to be applied as an accurate numerical analysis referring to oblique incident waves and porous seabed in real sea environment.