长江口综合整治工程波要素计算方法

Calculation methods of wave in comprehensive regulation project of the Yangtze River estuary

长江口位于开敞海域,波浪随季节变化,波况极为复杂。工程水域的设计波要素关系到海塘防洪安全,对于长江口综合整治工程有着重要影响。采用经验公式和数学模型两种方法计算长江口海域的波浪。研究结果表明,两种方法计算的平均波高相近;数学模型计算的波周期更符合波浪传播变形规律,经验公式计算的波周期偏保守、对工程来说偏安全。对两种计算方法的优缺点进行了比较分析。建议采用数学模型计算长江口水域的波要素,并采用经验公式进行复核。必要时结合波浪实测数据和物理模型,提高计算结果的准确性,为长江口综合整治工程提供可靠的设计波要素。

the Yangtze River estuary is located in the open sea area,so the waves vary with the seasons and the wave conditions are extremely complex.The design wave elements in the engineering water area are related to the flood control safety of seawall,and have an important influence on the comprehensive regulation project of the Yangtze River estuary.In this study,empirical formulas and mathematical models are used to calculate the waves in the Yangtze River estuary.It can be seen from the research results that the average wave height calculated by the two methods is close,the wave period calculated by the mathematical model is more in line with wave propagation and deformation law,and the wave period calculated by the empirical formula is conservative and more safer for engineering.The advantages and disadvantages of the two methods are compared and analyzed.It is suggested that mathematical model should be used to calculate wave elements in the Yangtze River estuary and empirical formula should be used to check them.If necessary,combined with the measured wave data and physical model,the accuracy of the calculation results can be improved,so as to provide reliable design wave elements for comprehensive regulation project in the Yangtze River estuary.