Variation of Harbor Oscillations in Yeongil Bay

Jeon, Min-Su; Lee, Joong-Woo; Jeong, Jae-Hyun; Yang, Sang-Yong; Jeong, Young-Hwan

Journal of Navigation and Port Research 2006;30(6):533-539.
Published online August 30, 2006.

영일만 항만에서의 부진동 변화에 관한 연구

전민수, 이중우, 정재현, 양상용, 정영환

Variation of Harbor Oscillations in Yeongil Bay

Min-Su Jeon, Joong-Woo Lee, Jae-Hyun Jeong, Sang-Yong Yang, Young-Hwan Jeong

Abstract

Today the harbor oscillation problems are the most significant factor to design harbors serving the very large ships. Large vessels moored in the elastic hawsers at the coastal harbors are often displaced due to the resonance between the long period waves and mooring system The cargo handling may be interrupted and the hawsers may be broken, especially when the amplification becomes remarkable. The most significant harbor which is confronted with harbor oscillation problem in Korea is the Pohang New Port. Many cases of problems are being notified by the pilot association and local office of MOMAF. However, it is difficult to prevent the arrival of long waves causing oscillation within this harbor. Moreover, government already started new port plan at the mouth of Yeongil Bay without treating problems occurred in the Pohang New Port. This study deals with the variation of harbor oscillation due to the construction of 4.1km breakwater at the bay mouth and new port plan. Numerical method used are fairly standard form from the extended mild slope equation. The obtained numerical results were compared with the field measurement from the previous study and this will bring a certain level of discussion and consideration of variation in the future port development.

Key Words: Coastal harbor;Harbor oscillation;Mooring system;Numerical method;Extended mild-slope equation; Field measurement