Sediment Transport: Difference between revisions

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==Lund-CIRP==
==Lund-CIRP==
Camenen and Larson (2005, 2007, and 2008) developed a general sediment transport formula for bed and suspended load under combined waves and currents.  
Camenen and Larson (2005, 2007, and 2008) developed a general sediment transport formula for bed and suspended load under combined waves and currents.  
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== Watanabe ==
== Watanabe ==
 
The total load sediment transport rate of Watanabe (1987) is given by
{{Equation|<math> q_{t*} = A \biggl[ \frac{(\tau_{b,max} - \tau_{cr}) U_c }{\rho g } \biggr]^{2.4}  </math>|2=6}}


== Soulsby-van Rijn ==
== Soulsby-van Rijn ==
The equilibrium sediment concentration is calculated as (Soulsby 1997)
The equilibrium sediment concentration is calculated as (Soulsby 1997)
{{Equation|<math> C_{*} = \frac{A_{sb}+A_{ss}}{h} \biggl[ \biggl( U_c^2 + 0.018 \frac{U_{rms}^2}{C_d} \biggr)^{0.5} - u_{cr} \biggr]^{2.4}  </math>|2=6}}
{{Equation|<math> C_{*} = \frac{A_{sb}+A_{ss}}{h} \biggl[ \biggl( U_c^2 + 0.018 \frac{U_{rms}^2}{C_d} \biggr)^{0.5} - u_{cr} \biggr]^{2.4}  </math>|2=7}}


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Revision as of 03:10, 16 January 2011

Lund-CIRP

Camenen and Larson (2005, 2007, and 2008) developed a general sediment transport formula for bed and suspended load under combined waves and currents.

Bed load

The current-related bed load transport with wave stirring is given by

  (1)

Suspended load

The current-related suspended load transport with wave stirring is given by

  (2)

The reference sediment concentration is obtained from

  (3)

where the coefficient is given by

  (4)

with being the dimensionless grain size and the kinematic viscosity of water.

The sediment mixing coefficient is calculated as

  (5)

van Rijn

Watanabe

The total load sediment transport rate of Watanabe (1987) is given by

  (6)

Soulsby-van Rijn

The equilibrium sediment concentration is calculated as (Soulsby 1997)

  (7)

Symbol Description Units
Bed load transport rate m3/s
Relative density -
Shields parameter due to currents -
Shields parameter due to waves and currents -
Critical shields parameter -
Empirical coefficient -
Empirical coefficient -
Current magnitude m/s

References

  • Camenen, B., and Larson, M. (2005). "A bed load sediment transport formula for the nearshore," Estuarine, Coastal and Shelf Science, 63, 249-260.
  • Camenen, B., and Larson, M., (2008). "A General Formula for Non-Cohesive Suspended Sediment Transport," Journal of Coastal Research, 24(3), 615-627.
  • Soulsby, D.H. (1997). "Dynamics of marine sands. A manual for practical applications," Thomas Telford Publications, London, England, 249 p.
  • Watanabe, A. (1987). "3-dimensional numerical model of beach evolution," Proceedings Coastal Sediments '87, ASCE, 802-817.