Flow movement and sediment transport in compound channels

被引：36

作者：

Hu, Chunhong ^{[2
,3
]}

Ji, Zuwen ^{[1
]}

Guo, Qingchao ^{[1
]}

机构：

[1] IWHR, Beijing 100048, Peoples R China

[2] China Inst Water Resources & Hydropower Res IWHR, Beijing 100048, Peoples R China

[3] Int Res & Training Ctr Eros & Sedimentat, Beijing 100048, Peoples R China

来源：

JOURNAL OF HYDRAULIC RESEARCH | 2010年 / 48卷 / 01期

关键词：

Compound channel; floodplain; flow exchange; main channel; sediment concentration distribution; velocity distribution; DISCHARGE; SECTIONS; SHEAR;

D O I：

10.1080/00221680903568600

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

There are many studies on the flow movement in compound channels, yet few are concerned with sediment transport. An experimental study on the flow movement and sediment transport in compound channels is presented. The experimental results indicate that the distribution of longitudinal velocity with depth in the main channel and the floodplains has a logarithmic component. The longitudinal velocity with flow depth in the interactive region does not obey a logarithmic distribution, but involves a wake function. In the boundary region, the longitudinal velocity obeys a parabolic distribution. In addition, based on the suspended sediment diffusion equation and the flow interaction between main channel and floodplains, expressions are derived to predict the lateral eddy viscosity and the sediment diffusion coefficients. Finally, an analytical solution for the lateral distribution of the depth-averaged velocity and sediment concentration in a compound channel is obtained. The results from the analytical solution agree well with experimentation.

引用

页码：23 / 32

页数：10

共 22 条

[1]

Chien N., 1999, MECH SEDIMENT TRANSP, DOI DOI 10.1061/9780784404003

[2]

ERVINE DA, 1982, P I CIVIL ENG, V2, P456

[3]

FUKUHARA T, 1990, INTERNATIONAL CONFERENCE ON RIVER FLOOD HYDRAULICS, P153, DOI 10.1109/MEMSYS.1990.110268

[4] SEDIMENT TRANSFER TO OVERBANK SECTIONS [J].