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通过一维及ECOMSED二维水动力数值模型,分别计算了黄茅海河口潮波传播中的非线性效应和径流对潮波的影响,以及潮能通量和潮能耗散。计算结果表明:1)在潮汐的高潮和低潮时,非线性效应对潮水位的影响较为明显,且越向上游影响越显著;2)当径流量加大到一定程度时,沿程潮差逐渐向上游减小,而当径流较小时,潮差则沿程增大;3)崖门射流口潮能辐聚,同时单位面积能耗率也最高,沿河道向上游,能通量与能耗率均有所下降,能耗与能通量的共同作用,导致了沿程潮差的变化;4)在一定的潮汐和流量边界条件下,具体的整体和局部河道形态决定了河口能量分布和耗散性质,从而决定了不同河口的动力场的具体特点。
Through one-dimensional and ECOMSED two-dimensional hydrodynamic numerical model, the nonlinear effects of tidal wave propagation and the effects of runoff on tidal waves, as well as tidal energy flux and tidal energy dissipation, are calculated respectively. The results show that: 1) At the climax and low tide of tides, the nonlinear effect has more obvious influence on the tidewater level, and the more obvious the impact is to the upstream; 2) When the runoff increases to a certain extent, While the smaller the runoff, the tide difference increases along the distance; 3) The Yamen jet tidal current can converge, and the energy consumption rate per unit area is also the highest. Along the channel, upstream flux, energy The rate of energy consumption decreases, and the combined effect of energy consumption and energy flux leads to the variation of tidal range. (4) Under certain tidal and flow boundary conditions, the specific global and local channel shapes determine the energy distribution of estuaries And dissipative properties, which determine the specific characteristics of the dynamic estuary of different estuaries.