Fractional model of cross sectional suspended sediment flux and its application in the Changjiang (Yangtze) Estuary

WU Jia-xue; SHEN Huan-ting; WU Hua-lin

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WU Jia-xue, SHEN Huan-ting, WU Hua-lin. Fractional model of cross sectional suspended sediment flux and its application in the Changjiang (Yangtze) Estuary[J]. Haiyang Xuebao, 2002, 24(6): 49-58.

Citation:

WU Jia-xue, SHEN Huan-ting, WU Hua-lin. Fractional model of cross sectional suspended sediment flux and its application in the Changjiang (Yangtze) Estuary[J]. Haiyang Xuebao, 2002, 24(6): 49-58.

WU Jia-xue, SHEN Huan-ting, WU Hua-lin. Fractional model of cross sectional suspended sediment flux and its application in the Changjiang (Yangtze) Estuary[J]. Haiyang Xuebao, 2002, 24(6): 49-58.

Citation:

WU Jia-xue, SHEN Huan-ting, WU Hua-lin. Fractional model of cross sectional suspended sediment flux and its application in the Changjiang (Yangtze) Estuary[J]. Haiyang Xuebao, 2002, 24(6): 49-58.

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Fractional model of cross sectional suspended sediment flux and its application in the Changjiang (Yangtze) Estuary

Received Date: 2000-11-03
Rev Recd Date: 2002-07-24

Abstract

Abstract

The errors of the cross-sectional sediment flux estimation mainlyorig in from survey sitelay out and flux calculation method.The flux model should copy with the principle of the minimum statistical errors of flux estimation.A grid with equal cell area is designed since only this type of grid introduces the fewest statistical errors in the flux estimation.Considering the sediment of different grain-sizes has different properties and transport behaviors,fractional concentration of suspended sediment is taken to estimate the various fractional fluxes.Vertical interpolation of the variables takes alogarithmic method and horizontal interpolation takes a cubic spline method. The cros-ssectional fractional flux model of suspended sediment in a tidal estuary is further developed and applied to the estimation of fractional sediment fluxes and sediment transport mechanism in the Changjiang Estuary. The cross-sectional sediment fluxes in the spring tide are characterized by larger in wards and larger outwards transportations with the latter being larger than the former,while sediment fluxes in the neap are characterized by smaller inwards and smaller outwards transports with the latter being larger than the former. The principal transport mechanisms of residual fluxes are Lagrangian transport and tidal pumping.
- sediment flux,
- tidal estuary,
- Changjiang(Yangtze) Estuary

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References

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