EMPIRICAL FORMULATION OF SEDIMENT PICKUP RATE IN TERMS OF WAVE ENERGY FLUX DISSIPATION RATE

被引：3
|
作者：
Goda, Yoshimi [1 ]
机构：
[1] ECOH Corp, Tokyo 1100014, Japan
来源：
COASTAL ENGINEERING JOURNAL | 2013年 / 55卷 / 04期
关键词：
Suspended sediments; sediment concentration; sediment pickup rate; wave breaking; wave energy dissipation; sediment transport equation; FIELD-MEASUREMENTS;
D O I：
10.1142/S0578563413500125
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The rate of sediment pickup for suspension by breaking waves is shown to be proportional to the dissipation rate of wave energy flux within the surf zone. A database of mean concentration of suspended sediment has been compiled by collecting various data of field measurements and large-scale laboratory tests and by calculating the depth-averaged mean concentration. The wave energy flux dissipation rate is computed with the PEGBIS model for random wave breaking on beaches of arbitrary profile. By comparing the mean sediment concentration and the energy flux dissipation rate, a sediment pickup coefficient is assessed at a value of 0.0045 on the average. Use of this coefficient makes it possible to estimate the cross-shore variation of mean sediment concentration. Peak values of mean sediment concentration within measured cross-shore profiles agree well with the prediction based on the wave energy flux dissipation rate.
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页数：17
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