Vertical suspended sediment diffusion and nearshore sediment-carrying capacity theory

LI Ruijie; DONG Dexing; ZHENG Jun; ZHANG Weiyi; PAN Xishan

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LI Ruijie, DONG Dexing, ZHENG Jun, ZHANG Weiyi, PAN Xishan. Vertical suspended sediment diffusion and nearshore sediment-carrying capacity theory[J]. Haiyang Xuebao, 2012, 34(5): 169-173.

Citation:

LI Ruijie, DONG Dexing, ZHENG Jun, ZHANG Weiyi, PAN Xishan. Vertical suspended sediment diffusion and nearshore sediment-carrying capacity theory[J]. Haiyang Xuebao, 2012, 34(5): 169-173.

LI Ruijie, DONG Dexing, ZHENG Jun, ZHANG Weiyi, PAN Xishan. Vertical suspended sediment diffusion and nearshore sediment-carrying capacity theory[J]. Haiyang Xuebao, 2012, 34(5): 169-173.

Citation:

LI Ruijie, DONG Dexing, ZHENG Jun, ZHANG Weiyi, PAN Xishan. Vertical suspended sediment diffusion and nearshore sediment-carrying capacity theory[J]. Haiyang Xuebao, 2012, 34(5): 169-173.

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Vertical suspended sediment diffusion and nearshore sediment-carrying capacity theory

1.
Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Nanjing 210098, China;Environment Marine Laboratory, Hohai University, Nanjing 210098, China
2.
Guangxi Academy of Sciences, Nanning 530007, China
3.
Environment Marine Laboratory, Hohai University, Nanjing 210098, China
4.
Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Nanjing 210098, China

Received Date: 2011-11-24
Rev Recd Date: 2012-08-12

Abstract

Abstract

According to chezy formula and two-dimensional suspended sediment diffusion equation, assumed that the vertical diffusion coefficient of sediment is a constant, then a new sediment-carrying capacity formula is derived theoretically.The new sediment-carrying capacity formula not only can be used in general, also applied to high suspended sediment concentration condition.The first-order approximate expression of the formula is coordinated with Liu-formula on its form, which is used in the nearshore frequently.Like Liu-formula, this approximate expression does not contain sediment settling velocity explicitly either.It is proved that the Liu-formula is rational and this empirical formula is reasonable in the theory.For its high-order approximate expression, the new sediment-carrying capacity formula contains sediment settling velocity explicitly, which is coordinated with Velikanov and Zhang's formulae.Therefore, the rationality of Zhang's formula is proved.Analyzed the physical meaning of derived formula and compared it with Liu-formula and Zhang-formula.In addition, the new formula indicated that the approximation of sediment-carrying capacity formula should be multinomial of velocity's second power.There will be some errors if use low order items as its approximate expression.
- chezy formula,
- vertical diffusion coefficient,
- suspended sediment diffusion,
- sediment-carrying capacity formula,
- near-shore area

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References(21)

References

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