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3-D fluid-mud dynamics in the Jiaojiang Estuary, China

机译：椒江河口的3-D流体-泥浆动力学

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摘要

A 3-D model has been developed for the muddy Jiaojiang Estuary and adjoining coastal waters, and verified against field observations. To simulate fluid-mud formation, the model uses a fine resolution grid near the bottom and involves coupling processes between hydrodynamics and fluid mud such as the sediment-induced buoyancy, increasing turbulent kinetic energy sink and kinematic viscosity, mixing by internal waves riding on the lutocline, and non-Newtonian properties of fluid mud. The effective hydrodynamic drag was reduced in the presence of fluid mud. It is shown that the estuary is infilled by tidal pumping and that longitudinal and transversal gradients of suspended sediment concentration, salinity, and currents control the formation of mud banks. Thus a 3-D model is necessary to estimate the fate of mud, although the model results are very sensitive to details of the parameterization of the hydrodynamics-mud feedback processes.
机译：已经为泥泞的椒江河口和毗连的沿海水域开发了一个3-D模型，并已通过实地观测进行了验证。为了模拟流体泥浆的形成，该模型在底部附近使用了一个高分辨率网格，并涉及了流体动力学和流体泥浆之间的耦合过程，例如沉积物引起的浮力，增加的湍动能吸收和运动粘度，内部波的混合作用。 lutocline和非牛顿流体泥浆的特性。在流体泥浆的存在下，有效的流体动力阻力减小了。结果表明，河口被潮汐泵浦填充，悬浮泥沙浓度，盐度和水流的纵向和横向梯度控制着泥浆的形成。因此，尽管模型结果对流体动力学-泥浆反馈过程的参数设置细节非常敏感，但是3-D模型对于估算泥浆的命运是必要的。

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