Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Secondary Flow Effects on Deposition of Cohesive Sediment in a Meandering Reach of Yangtze River
Few researches focus on secondary flow effects on bed deformation caused by cohesive sediment deposition in meandering channels of field mega scale. A 2D depth-averaged model is improved by incorporating three submodels to consider different effects of secondary flow and a module for cohesive sediment transport. These models are applied to a meandering reach of Yangtze River to investigate secondary flow effects on cohesive sediment deposition, and a preferable submodel is selected based on the flow simulation results. Sediment simulation results indicate that the improved model predictions are in better agreement with the measurements in planar distribution of deposition, as the increased sediment deposits caused by secondary current on the convex bank have been well predicted. Secondary flow effects on the predicted amount of deposition become more obvious during the period when the sediment load is low and velocity redistribution induced by the bed topography is evident. Such effects vary with the settling velocity and critical shear stress for deposition of cohesive sediment. The bed topography effects can be reflected by the secondary flow submodels and play an important role in velocity and sediment deposition predictions.
Secondary Flow Effects on Deposition of Cohesive Sediment in a Meandering Reach of Yangtze River
Few researches focus on secondary flow effects on bed deformation caused by cohesive sediment deposition in meandering channels of field mega scale. A 2D depth-averaged model is improved by incorporating three submodels to consider different effects of secondary flow and a module for cohesive sediment transport. These models are applied to a meandering reach of Yangtze River to investigate secondary flow effects on cohesive sediment deposition, and a preferable submodel is selected based on the flow simulation results. Sediment simulation results indicate that the improved model predictions are in better agreement with the measurements in planar distribution of deposition, as the increased sediment deposits caused by secondary current on the convex bank have been well predicted. Secondary flow effects on the predicted amount of deposition become more obvious during the period when the sediment load is low and velocity redistribution induced by the bed topography is evident. Such effects vary with the settling velocity and critical shear stress for deposition of cohesive sediment. The bed topography effects can be reflected by the secondary flow submodels and play an important role in velocity and sediment deposition predictions.
Secondary Flow Effects on Deposition of Cohesive Sediment in a Meandering Reach of Yangtze River
Cuicui Qin (Autor:in) / Xuejun Shao (Autor:in) / Yi Xiao (Autor:in)
2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
Study on Flow Pattern and Characteristics of Sediment Deposition in Tidal Reach of Yangtze River
| British Library Conference Proceedings | 2012
Evaluating Regime Change of Sediment Transport in the Jingjiang River Reach, Yangtze River, China
| DOAJ | 2018
2-D Numerical Modeling Unsteady Flow and Sediment Transport in Chongqing Reach of the Yangtze River
| British Library Conference Proceedings | 2004
Incorporating Sediment Mass Balance into a Meandering River Model
| British Library Conference Proceedings | 2008