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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Suspended sediment transport in the Deepwater Navigation Channel, Yangtze River Estuary, China, in the dry season 2009: 1. Observations over spring and neap tidal cycles
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Suspended sediment transport in the Deepwater Navigation Channel, Yangtze River Estuary, China, in the dry season 2009: 1. Observations over spring and neap tidal cycles

机译：2009年旱季，中国长江口深水航道中的悬浮泥沙输送：1.春季和潮汐周期的观测

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摘要

[1] The in situ data in the Deepwater Navigation Channel (DNC), Yangtze River Estuary (YRE), China, in the dry season 2009, shows spring tides associated with greater maximum velocities, more mixing, less stratification, and diffused fluid mud; whereas neap tides are associated with smaller maximum velocities, greater stratification, inhibited mixing, and stratified fluid muds. The balance of salt flux indicates the seaward salt transport is dominated by fluvial flows, and the landward salt transport is generated by compensation flows during spring tides, but shear effects during neap tidal cycles. The balance of suspended sediment flux illustrates the offshore sediment transport is dominated by fluvial flows as well, but the onshore transport is induced by tidal-pumping effects on spring tides, and shear effects on neaps. The suspended sediment transport is strongly affected by the salinity distribution and salinity-gradient-induced stratification in the DNC. The spring-neap asymmetry is generated by the estuarine gravitational circulation during low-flow conditions; while the flood-ebb asymmetric stratification within a tidal cycle is due to the semidiurnal tidally movement of the salt front.
机译：[1] 2009年枯水期，中国长江口（YRE）深水航道（DNC）的原位数据显示，春季潮汐与最大流速更高，更多的混合，更少的分层以及流体泥浆的扩散有关。 ;潮汐与最大速度较小，分层较大，混合受阻以及流体泥浆分层有关。盐通量的平衡表明，向海的盐分运移主要由河水流动引起，向陆上的盐分运移是由春季潮汐时的补偿流产生的，但在潮汐周期中具有剪切作用。悬浮泥沙通量的平衡说明，海上泥沙的输送也以河流流量为主，但陆上的输送是由潮汐泵吸对春季潮汐的影响以及剪力对小结的影响所引起的。 DNC中盐分分布和盐度梯度诱发的分层强烈影响悬浮的泥沙运移。弹簧间隙不对称性是由低流量条件下的河口重力循环产生的。而潮汐周期内潮起潮落不对称分层是由于盐锋的半日潮汐运动。

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