高集海堤打开后马銮湾开口对厦门东西海域的影响

Influence of Maluan Bay opening on the western and the eastern waters of Xiamen after Gaoji Crossway opening

随着厦门高集海堤打开及东西海域清淤工程实施,厦门海域边界条件和水动力环境均发生了较大变化.根据最新边界条件、地形条件和水文泥沙条件,通过数学模型研究打开马銮湾对厦门东西海域的影响.研究结果表明大潮条件下,高集海堤打开后,高集海堤处产生自西向东的净潮量为3 930亿m3,西海域的水体交换能力显著增强;进一步打开马銮湾后,增加的涨、落潮总潮量平均4 560亿m3,增加的潮量分别通过鼓浪屿断面和五通断面进出西海域和同安湾,分配比例接近1∶1.马銮湾开口可以增加东西海域水体交换能力,但东西海域水质是否改善取决于马銮湾水质情况.

With the opening of Gaoji Crossway and the dredging performance in Tongan Bay and in the western waters of Xiamen,the boundary conditions and hydrodynamic environment of Xiamen sea have changed greatly.Based on the latest boundary conditions,topography conditions and hydrology and sediment conditions,the influence of Maluan Bay opening on Tongan Bay and the western waters of Xiamen is studied used mathematical modelling.As results,under the conditions of spring tide when Gaoji Crossway was opened,the net tidal volume generated from the Gaoji Crossway opening was 3 930×10 8 m 3,and the exchange capacity of water in the western waters was significantly enhanced.After further opening of Maluan bay,the total tidal volume will increase in average of 4 560×10 8 m 3 flowing in through Gulangyu sections and Wutong sections to Tongan Bay and the western waters,respectively,with allocation proportion close to 1∶1.The water exchange capacity between Tongan Bay and the western waters can be enhanced after the opening.However,the water quality of Tongan Bay and the western waters will depend on the water quality of Maluan Bay.