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中文摘要：
以辽东湾为研究区域,利用EFDC建立三维水动力模型,研究人工岛布置方式对周围海域水动力及水交换的影响。研究结果表明,人工岛的建设阻碍了水流运动,迎水面投影长度越长,其对水流的阻碍作用越大,容易形成较大的低流速区,同时区域内的水体交换能力也越差;人工岛岸线的复杂程度对区域的水动力也有一定影响,曲折多变的人工岛岸线易形成半封闭水域,水体流动性变差,不易于水体交换;比较分析大潮和小潮时各人工岛方案与无岛方案的速度,结果表明人工岛对周围海域的影响与潮流强度密切相关。探讨了表征水体交换能力指标半交换时间及体积交换率,后者更能展现人工岛布置方式对周围海域水体交换的影响。研究成果为填海造陆工程提供了一定的参考依据。
英文摘要：
A three-dimensional hydrodynamic model of the Liaodong Bay was developed in the flame of Environmental Fluid Dynamics Code （EFDC） to study the effects of the artificial island layout on hydrodynamics and water exchange in the coastal waters. The results show that the island blocks water flow and the width of its upstream face is the most significant factor of the blocking effect. An island with a larger width has a greater blocking effect and forms a larger area of low-velocity flow, thereby resulting in a lower capacity of water exchange in the study area. Complexity of island shoreline is also a considerable factor of the flow hydrodynamics： A zigzag shoreline is easier to form a semi-enclosed area of very low flow and poor conditions of water exchange. We compared the blocking effects and flow velocities in the water region near the island in tidal flows of different intensities and found out that the impact of the island much depended on tidal intensity. The capacity of water exchange is described and compared using two parameters： half-life time and volume-exchange rate. The latter is found better describing the differences in water exchange produced by different island layouts.
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