中文摘要：

长兴岛实施滩涂圈围工程对周边水动力环境具有一定的影响。为了研究其波及范围和影响程度,根据大量的现场监测资料,建立了长江口二维水动力模型,分别对围涂造地工程实施前后的潮流场进行数值模拟。分析表明：围涂造地对长江口的影响区域主要集中在围堤工程区东侧横沙通道下游、工程区南侧长兴南岸水道下游等局部水域内,对距离较远的水域基本没有影响,整体河势受影响程度较小。

英文摘要：

The reclamation of Changxing Island has an impact on the surrounding hydrodynamic condition. In order to analyze the influential range and degree,a two- dimensional hydrodynamic model was established for Changjiang estuary based on a large amount of in- situ monitoring data. The current fields before and after the project construction was simulated by the model. The simulation results show that the influence of the project is mainly on the water area near the construction site such as the downstream of Hengsha Channel on the east side of the project and the south water channel of Changxing Island on the south side of the project. The impact on the whole river regime is relatively small.