A general formula for noncohesive suspended sediment transport

被引:69
作者
Camenen, Benoit [1 ]
Larson, Magnus [2 ]
机构
[1] Kyoto Univ, Disaster Prevent Res Inst, Fushimi Ku, Kyoto 6128235, Japan
[2] Lund Univ, Dept Water Resources Engn, S-22100 Lund, Sweden
关键词
suspended load; concentration; profile; reference concentration; diffusion parameter; current; waves; breaking waves; noncohesive sediment;
D O I
10.2112/06-0694.1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A simple and robust suspended load transport formula for noncohesive sediment is presented for application to river, estuarine, and coastal environments with the use of depth-averaged models. The formula is based on an exponential profile for the concentration and assumes a constant velocity over depth to simplify the calculations. These assumptions were validated with a large data set, including data with a steady current, wave and current interaction, and breaking waves. The formula has two parameters: the mean sediment diffusivity over depth and the bottom reference concentration. The sediment diffusivity is estimated assuming a linear combination of mixing because of breaking waves and the energy dissipation in the bottom boundary layer from the mean current, waves, or both. The bottom reference concentration is a function of the Shields parameter. Overall, the formula developed in this study yields the best agreement with the compiled data set compared with a number of existing formulas for estimating the suspended load.
引用
收藏
页码:615 / 627
页数:13
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