Study on Sediment Carrying Capacity of Breaking Wave in Muddy Coast

Various coefficients in sediment transport models must be accounted for. Models based on depth-averaged equations and sediment carrying capacity formula contain some coefficients: α, k, and m. At the present, no widely acceptable method has been developed for determining the values of these coefficients. The focus of this paper is in the development of semi-theoretical formulas for estimating these coefficients such that, in practical applications, the uncertainty involved in selecting coefficients is minimized. Model verification shows that the coefficients obtained from the proposed formulas give a good simulation of the channel bed deformation. In addition, Rouse's equation for sediment concentration distribution will become solvable because the reference concentration can be determined from the derived expression for α. The simulated concentration profiles obtained by solving the Rouse's equation and α formula agree reasonably well with the measured data.Key words: depth-averaged model, sediment transport, sediment-carrying capacity.

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Determination of the Sediment Carrying Capacity Based on Perturbed Theory

The Scientific World JOURNAL ◽

10.1155/2014/240858 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Zhi-hui Ni ◽

Qiang Zeng ◽

Wu Li-chun

Keyword(s):

Carrying Capacity ◽

Influencing Factor ◽

Least Square Method ◽

Least Square ◽

New Method ◽

Linear Regression Method ◽

Average Flow Velocity ◽

New Formula ◽

Sediment Carrying Capacity

According to the previous studies of sediment carrying capacity, a new method of sediment carrying capacity on perturbed theory was proposed. By taking into account the average water depth, average flow velocity, settling velocity, and other influencing factors and introducing the median grain size as one main influencing factor in deriving the new formula, we established a new sediment carrying capacity formula. The coefficients were determined by the principle of dimensional analysis, multiple linear regression method, and the least square method. After that, the new formula was verified through measuring data of natural rivers and flume tests and comparing the verified results calculated by Cao Formula, Zhang Formula, Li Formula, Engelung-Hansen Formula, Ackers-White Formula, and Yang Formula. According to the compared results, it can be seen that the new method is of high accuracy. It could be a useful reference for the determination of sediment carrying capacity.

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Sediment Transport over Deposited Beds in Sewers

Water Science & Technology ◽

10.2166/wst.1994.0658 ◽

1994 ◽

Vol 29 (1-2) ◽

pp. 125-133 ◽

Cited By ~ 24

Author(s):

C. Nalluri ◽

A. Ab. Ghani ◽

A. K S. El-Zaemey

Keyword(s):

Experimental Investigation ◽

Sediment Transport ◽

Cross Section ◽

Carrying Capacity ◽

Rectangular Cross Section ◽

Correlation Coefficients ◽

Bedload Transport ◽

Empirical Equations ◽

Shape Parameters ◽

Sediment Carrying Capacity

This paper is based on an extensive experimental investigation of bedload transport of noncohesive sediments at “limit deposition” in channels of circular and rectangular cross-section. The effect of permanent deposits on the invert of pipe channels on sediment carrying capacity and hydraulic resistance to flow is investigated. The sediment transport data from rectangular and pipe channels led to the development of empirical equations with high correlation coefficients. These equations showed the possibilities of their validity for either channel shape with the incorporation of appropriate shape parameters.

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The Analysis and Discussion of Sediment Transport Capacity Formula

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.188.259 ◽

2012 ◽

Vol 188 ◽

pp. 259-263 ◽

Cited By ~ 1

Author(s):

Wei Yi Zhang ◽

Gui Ying Lu ◽

Xi Shan Pan

Keyword(s):

Diffusion Equation ◽

Carrying Capacity ◽

Sediment Concentration ◽

Two Dimensional ◽

Transport Capacity ◽

Sediment Transport Capacity ◽

Sediment Data ◽

New Formula ◽

Sediment Carrying Capacity ◽

High Application

Combined with the equilibrium condition, the formula of vertical average sediment concentration has been derived from the vertical two-dimensional suspended sediment diffusion equation. Based on analyzing and comparing two hydrodynamic formulas, a new formula of sediment carrying capacity has been deduced. Some river and inshore sediment data has been collected to validate the formula and find that the new formula has higher accuracy and applicability comparing with the two hydrodynamic formulas, it shows that the new formula has a high application value.

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Preliminary Study about the Sediment Carrying Capacity Formula

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.1771 ◽

2012 ◽

Vol 535-537 ◽

pp. 1771-1774

Author(s):

Wei Yi Zhang ◽

Zhen Xiang Wang ◽

Jun Zheng

Keyword(s):

Diffusion Equation ◽

Carrying Capacity ◽

Equilibrium Condition ◽

Sediment Concentration ◽

Two Dimensional ◽

Preliminary Study ◽

Sediment Data ◽

New Formula ◽

Sediment Carrying Capacity ◽

High Application

Combined with the equilibrium condition, the formula of vertical average sediment concentration has been derived from the vertical two-dimensional suspended sediment diffusion equation. Based on analyzing and comparing two hydrodynamic formulas, a new formula of sediment carrying capacity has been deduced. Some river and inshore sediment data has been collected to validate the formula and find that the new formula has higher accuracy and applicability comparing with the two hydrodynamic formulas, it shows that the new formula has a high application value.

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Process-based suspended sediment carrying capacity of silt-sand sediment in wave conditions

International Journal of Sediment Research ◽

10.1016/j.ijsrc.2021.09.007 ◽

2021 ◽

Author(s):

Liqin Zuo ◽

Dano Roelvink ◽

Yongjun Lu ◽

Guanghui Dong

Keyword(s):

Suspended Sediment ◽

Carrying Capacity ◽

Wave Conditions ◽

Sediment Carrying Capacity

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Influence of wave and current flow on sediment-carrying capacity and sediment flux at the water–sediment interface

Water Science & Technology ◽

10.2166/wst.2014.338 ◽

2014 ◽

Vol 70 (6) ◽

pp. 1090-1098 ◽

Cited By ~ 3

Author(s):

Jun Zheng ◽

Ruijie Li ◽

Yonghai Yu ◽

Anning Suo

Keyword(s):

Sediment Transport ◽

Carrying Capacity ◽

Superposition Principle ◽

Transport Processes ◽

Sediment Flux ◽

Spatial And Temporal Scales ◽

Significant Wave ◽

New Formula ◽

Sediment Interface ◽

Sediment Carrying Capacity

In nearshore waters, spatial and temporal scales of waves, tidal currents, and circulation patterns vary greatly. It is, therefore, difficult to combine these factors’ effects when trying to predict sediment transport processes. This paper proposes the concept of significant wave velocity, which combines the effects of waves, tides, and ocean currents using the horizontal kinetic energy superposition principle. Through a comparison of the relationship between shear stress at the water–sediment interface and sediment-carrying capacity, assuming equilibrium sediment flux, a new formula for sediment-carrying capacity, which incorporates the concept of significant wave velocities, is derived. Sediment-carrying capacity is a function of the critical velocity, which increases with water depth and decreases with increasing relative roughness of the seabed. Finally, data from field observation stations and simulations are used to test the proposed formula. The results show that the new formula is in good agreement with both field and simulation data. This new formula for sediment-carrying capacity can be used to simulate nearshore sediment transport.

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