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Parameterization of Time-Averaged Suspended Sediment Concentration in the Nearshore Public Deposited

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  • To quantify the effect of wave breaking turbulence on sediment transport in the nearshore, the vertical distribution of time-averaged suspended sediment concentration (SSC) in the surf zone was parameterized in terms of the turbulent kinetic energy (TKE) at different cross-shore locations, including the bar crest, bar trough, and inner surf zone. Using data from a large-scale laboratory experiment, a simple relationship was developed between the time-averaged SSC and the time-averaged TKE. The vertical variation of the time-averaged SSC was fitted to an equation analogous to the turbulent dissipation rate term. At the bar crest, the proposed equation was slightly modified to incorporate the effect of near-bed sediment processes and yielded reasonable agreement. This parameterization yielded the best agreement at the bar trough, with a coefficient of determination R2 ≥ 0.72 above the bottom boundary layer. The time-averaged SSC in the inner surf zone showed good agreement near the bed but poor agreement near the water surface, suggesting that there is a different sedimentation mechanism that controls the SSC in the inner surf zone.
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  • Yoon, H. D., Cox, D., & Mori, N. (2015). Parameterization of Time-Averaged Suspended Sediment Concentration in the Nearshore. Water, 7(11), 6228-6243. doi:10.3390/w7116228
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  • 7
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  • 11
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  • This material is based upon work supported by the National Science Foundation under Grant Nos. 1356978 and 0351741. Daniel Cox acknowledges the support of the Japan Society for the Promotion of Science for partial support of this work. Hyun-Doug Yoon was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2014R1A1A1008095) and research fund of Myongji University.
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