EXPERIMENTAL STUDY OF FLOW RESISTANCE IN A STRAIGHT OPEN-CHANNEL WITH GRAVEL BED

被引：0
|
作者：
Zeng, C. [1 ]
Li, C. W. [1 ]
机构：
[1] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Hong Kong, Hong Kong, Peoples R China
来源：
PROCEEDINGS OF THE SECOND INTERNATIONAL POSTGRADUATE CONFERENCE ON INFRASTRUCTURE AND ENVIRONMENT, VOL 1 | 2010年
关键词：
Laboratory experiment; straight open channel; gravel bed; velocity profile; flow resistance; TURBULENT VELOCITY PROFILES; MOUNTAIN RIVERS; BOUNDARY SHEAR; ROUGHNESS;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
An understanding of flow resistance due to gravel bed is the most basic knowledge required by hydraulic engineers for determining stage and discharge characteristics of river courses. In the present study, a laboratory experiment has been carried out in order to investigate the flow resistance law for a straight gravel-bed open-channel with different bed slopes and flow rates. It turns out that roughness length scale (k(s)) is dependent on the bed slope (S-0) and increases as S-0 increase. The profiles of mean streamwise velocity agree well with the common distribution law. The effects of bed slopes and relative submergence on flow resistance were further analyzed.
引用
收藏
页码：75 / 83
页数：9
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