Wave Height Reduction Inside Pohang New Port, Korea, Due to the Construction of a Detached Breakwater

Abstract

The effect of a detached breakwater, which was constructed to improve harbor tranquility inside Pohang New Port, was examined through the comparison of wave data measured before and after the construction of the breakwater. The observation data showed that the wave energy was effectively reduced by the breakwater, although the wave height measured outside the breakwater was higher after its construction. The wave energy was reduced in all of the measured wave-propagating directions, but it was also observed that the breakwater became less effective in protecting against northeastwaves than in protecting against NNE waves. The BOUSS-2D Boussinesq-type wave model was employed to analyze the pattern of wave propagation, showing that, before the breakwater’s construction, NE waves could directly enter the port, increasing the wave energy inside the port. After the breakwater’s construction, simulations showed that the detached breakwater effectively blocked the waves approaching the port from both the NNE and NE directions, although the wave heights of the waves from the extreme NE direction inside the port increased. Considering that the estimated probability of failing to preserve the port tranquility was only 0.2–0.5% for these extreme NE waves, it was concluded that no secondary structures were necessary, and the existing breakwater was sufficient for the protection of the port.

Induced Waves from Typhoon Maysak: Model Optimization and Evolution Characteristics in Yeongil Bay, South Korea

“…Figure 1 illustrates the wave observation locations and the movement path of Typhoon Maysak. The wave conditions in the Korean sea waters were obtained through an online platform called WINK (Wave Information Network Korea) (Jeong et al, 2018) and the in-field wave records (Ryu et al, 2022).…”

Investigating the Harbour Basin Tranquillity in the Genaveh Port Development Plan

“…Port development can be accomplished by constructing a new harbour basin or expanding the existing basin, where the purpose is usually to increase the marine capacity and upgrade port operations, which both have a direct impact on the regional economy [1]. To increase the port capacity, it is necessary to build a harbour basin that is surrounded by an artificial breakwater to provide suitable tranquillity at the harbour basin [2,3]. The important tasks of the harbour basin are to create a safe berthing and anchorage for vessels, provide a platform to transfer passengers safely between vessels and land and improve the efficiency of vessel transportation by reducing the waiting time of vessels at the port [4,5].…”

“…3 /m/s), x and y are the Cartesian coordinates (m), h and d are the total water depth and still water depth (m) respectively, n is the porosity coefficient, C is the Chezy resistance number ( m /s), α and β represent the resistance coefficient for laminar and turbulent flow in porous media, S is the water level compared to the base level (m), ψ 1 and ψ 2 are the dispersive Boussinesq terms, and R xx , R xy and R yy are the excess momenta from surface rollers.…”