莺歌海离岸码头接岸方式对岸滩演变影响研究

依据海洋站多年波浪观测资料,采用波能平衡波浪数学模型与沿岸输沙公式相结合的方法对莺歌海离岸码头接岸工程实施引起的沿岸输沙量变化及岸线变形进行计算研究。计算结果表明,离岸码头接岸结构采用实体引堤将会切断沿岸堤两侧输沙通道,使得两侧岸滩沿堤以不同速率向海淤涨,破坏了附近天然沙滩的自然稳定状态,不利于海岸线的保护;当码头接岸结构调整为透空结构后,工程区海岸线变化幅度较小,有利于维持岸滩稳定。

Study on the effect of beach evolution by offshore wharf shore-connecting structure of Yingge Sea

Based on many years wave observation of ocean station, This paper studies the longshore sediment transport and coastline deformation by a joint method of formula and wave energy balance of wave mathematical model. The results show that both sides of the embankment, which is nearly crossed the shore line, will silt seawards in different rate for the longshore sediment movements stopped by wharf sturcture. The naturally beach stable equilibrium is destroied by the embankment, and this goes against the coastal protection. When the shore-connecting structure are adjusted to the permeable structure, the shoreline changes very slightly in the project area, it is beneficial to keep beach stability.