Experiment on Suspended Sediment Transport Rate in Weak Dynamic Cohesive-Sediment-Laden Flow
As a basic representation of flow movement in the Yellow River estuary,the weak dynamic cohesive-sediment-laden flow plays an important role in the evolution of this area.By means of indoor flume experiment,the basic movement characteristics of weak dynamic cohesive-sediment-laden flow were first summarized,and then the (Suspended Sediment Transport Rate) SSTR impacted by hydrodynamic conditions,sediment supply,and water quality conditions was subsequently explored in this paper.It is concluded from the results that variation of the SSTR differs largely for different conditions.When hydrodynamic conditions become weak the SSTR decreases,of which the decreasing range depends on sediment supplies.The range is smaller in lower sediment supply,and larger in higher sediment supply,with the fact that when sediment supply becomes higher and exceeds a critical value,the ratio of SSTR for different hydrodynamic conditions will remain approximately invariable.As sediment supply increases the SSTR increases as well,of which the increasing range is dependent upon hydrodynamic conditions.The weaker the hydrodynamic conditions,the smaller the range.However,when hydrodynamic conditions get stronger and exceed a critical value,the ratio of SSTR for different sediment supplies will roughly not exhibit variation.It is also found that a lamination will occur in sediment-laden flows induced by both high sediment concentration and weak hydrodynamic conditions appearing at the same time,of which the heavier the ion concentration,the lower the SSTR,however,when the ion concentration becomes higher and exceeds a critical value the SSTR will nearly not vary with it.
weak dynamic flow cohesive sediment suspended sediment transport rate flow condition sediment supply water quality condition
Xu Wensheng Zhou Wei Chen Li Liu Lin
Division of Soil and Water Conservation, Changjiang River Scientific Research Institute,Wuhan,430010 Changjiang Survey Planning Design and Research Co., Ltd., Wuhan,430010, China State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University, Wuhan, Changjiang Waterway Institute of Planning & Design, Wuhan, 430000, China
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
256-265
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）