原文传递
Modeling the Temporal Evolution of Dredging-Induced Turbidity in the Far Field
| 题名： | Modeling the Temporal Evolution of Dredging-Induced Turbidity in the Far Field |
| 其他题名： | Bray,R.N.(2008).Environmental aspects of dredging,Taylor&Francis,London,NY. |
| 正文语种： | 英文 |
| 作者： | Dongdong Shao |
| 关键词： | Dredging;Turbidity plume;Far-field transport;Environmental impact assessment |
| 摘要： | A mathematical model of the transport of dredging-induced turbidity in the far field was developed in this study. Unlike the majority of the existing models, which assume a steady state, the present model retains the transient term, ∂c/ ∂t, to predict the temporal evolution of the spatial extent and concentration of the sediment plume. The unknown source strength is calibrated using field data. The appropriate turbulent diffusion coefficient in the longitudinal direction, Dx, is set to comply with the real situation with negligible longitudinal diffusion. The complete transient model formulation was then used to analyze the effects of key modeling parameters, such as the water depth, h, mean tidal current velocity, u, turbulent diffusion coefficients in the longitudinal and transverse directions, Dx and Dy, as well as the sediment-settling velocity, ws, on the model prediction, in particular the approach to the steady state and the ultimate suspended sediment concentration level at the steady state. The semianalytical model thus developed with improved functionality can be used for worst-case assessments of the steady-state flow conditions in the far-field transport of the sediment plume generated by dredging operations. |
| 出版年： | 2015 |
| 论文唯一标识： | P-108Y2015V141N05004 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)WW.1943-5460.0000295 |
| 期刊名称： | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| 拼音刊名(出版物代码)： | P-108 |
| 卷： | 141 |
| 期： | 05 |
| 页码： | 16-23 |
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