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Beach Profile Model with Size-Selective Sediment Transport. I: Laboratory Experiment and Sensitivity Study
| 题名： | Beach Profile Model with Size-Selective Sediment Transport. I: Laboratory Experiment and Sensitivity Study |
| 其他题名： | Aagaard,T.,and Hughes,M.G.(2010)."Breaker turbulence and sediment suspension in the surf zone."Mar.Geol.,271(3-4),250-259. |
| 正文语种： | 英文 |
| 作者： | Chatchawin Srisuwan |
| 关键词： | Beach profile evolution;Size-selective sediment transport;Sediment grain sorting;Wave flume experiment;Nearshore hydrodynamics |
| 摘要： | The response of physical models of beach profiles to random breaking waves was studied to investigate size-selective sediment transport and cross-shore profile evolution. Three types of beach profiles with different sediment mixtures were considered and subjected to waves until profiles reached equilibrium. Size-selective sediment transport was evident in the experiments, with the mean sediment size varying up to 20％ along the beach profiles. Consistent coarsening and fining of the surface sediment in the experiments revealed size-selective sediment transport governed by cross-shore variations in energy dissipation, affecting important beach profile features such as sandbar structures and offshore and foreshore slopes. The theoretical basis of the transport phenomenon was described by analyzing the relationship between the transport processes and essential wave and hydrodynamic parameters obtained using a new set of numerical models. The results showed that beach profile changes and associated sediment grain sorting are most sensitive to instantaneous total water velocity and local energy flux under propagating waves. |
| 出版年： | 2015 |
| 论文唯一标识： | P-108Y2015V141N02003 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)WW.1943-5460.0000255 |
| 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： | 02 |
| 页码： | 21-30 |
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