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依据质量守恒定律 ,将流场和悬沙场分别分解成 3种不同时间尺度的速度和悬沙浓度的叠加 ,从理论上较严密地导出了适合于河口海岸区域 ,在波 流共同作用下一般形式的三维悬沙扩散方程 ;通过对脉动扩散项与波动扩散项的参数化 ,给出了适合于具体计算的三维悬沙扩散方程 .与以往扩散方程不同的是 ,新给出的方程中能清晰地反映波浪、水流同时对悬沙扩散的影响
According to the law of conservation of mass, the flow field and the suspended sediment are respectively decomposed into superposition of velocities and suspended sediment concentrations at three different timescales. The generalized form suitable for estuarine and coastal regions is derived theoretically more strictly. The three-dimensional suspended sediment diffusion equation is given, and the three-dimensional suspended sediment diffusion equation suitable for specific calculation is given by parameterizing the fluctuating diffusion term and the fluctuating diffusion term. The difference from the previous diffusion equation is that the new equation Reflect the wave, water flow at the same time the impact of the proliferation of suspended sediment