According to experimental data, dredging in the lower Yellow River is possible and has some advantages. In general, the dredging efficiency consists of three parts: the scouring and depositing rate (SDR) in the upper ...
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According to experimental data, dredging in the lower Yellow River is possible and has some advantages. In general, the dredging efficiency consists of three parts: the scouring and depositing rate (SDR) in the upper dredged channel, the fill-in rate in the dredged channel and the scouring and depositing in the lower dredged channel. The factors affecting dredging efficiency include the dimension of dredged channel and the flow and sediment conditions, and the effects of the latter are larger than that of the former. If the ratio of width to depth of dredged channel was about from 5 to 8, and the length of dredging channel was about 10 km, the dredging efficiency would be the highest in the Lower Yellow River. For the same dimension of dredging channel, the dredging efficiency would decrease rapidly with increase of the ratio of sediment concentration to discharge. When the ratio is about 0.025, the dredging efficiency is better. When the ratio is over 0.05, the dredging efficiency almost disappears.
Dynamic characteristics of sea currents in the Yellow River Estuary, such as tidal current, residual current and storm surges are studied and the direction and quantity of sediment dispersion are analyzed in the paper...
Dynamic characteristics of sea currents in the Yellow River Estuary, such as tidal current, residual current and storm surges are studied and the direction and quantity of sediment dispersion are analyzed in the paper. The resultant direction of sediment dispersion is found northeast. The sea currents transport 40% of the total sediment load from the Yellow River to the mid sea. Optimum direction of the Yellow River outlet for full utilizing the sea currents to transport sediment to the mid sea, and strategies for stabilizing the Yellow River outlet are proposed.
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