梅山水道避风锚地潮流泥沙数值计算

在地形及水文测验资料收集整理的基础上,建立了梅山水道附近海域平面二维潮流泥沙数学模型,模型经水流泥沙运动相似验证后在典型大、小潮水文条件下进行了工程方案计算,分析研究了梅山水道潮汐通道封闭后其附近海域潮流动力及泥沙冲淤变化情况。研究结果表明,梅山水道潮汐通道涨、落潮量占周边其他水道比例较小,工程的实施未改变周边海域整体潮流场结构及海床冲淤基本平衡的格局,工程后拟建南、北两堤近堤附近海域海床因流速减小形成缓流、回流区,从而使泥沙产生累积性淤积,附近水利设施的运行将受到不同程度影响。

Tidal current and sediment numerical calculation for Meishan waterway

A 2-D tidal current and sediment mathematical model for Meishan waterway sea area is established on the basis of analyzing the measured data. After flow and sediment motion verification， the model is applied to calculate and analyse the changes of the tidal current and the erosion-siltation variation caused by the anchorage shelter project under typical spring-neap tide conditions. The research results show that the flood and ebb tidal volume in the Meishan waterway constitutes a small percentage of those of the surrounding waterways， bringing no changes of the flow field and sediment balance in the large sea area. Cumulative deposition trend is shown in recirculation and slow-flow region near the proposed two dikes at the south and north waterways because of velocity decreasing, which will give some impacts on the water conservancy facilities located in the adjacent areas. Therefore it is necessary to take protective measures to ensure safe operation of the small sluices and wharfs located in the sea area. The analysis research findings can provide a technical support for the project design and construction.