Effect of bed load transport on the energy dissipation of step-pool system

被引：0
|
作者：
Li W. [1 ,2 ]
Li Z. [3 ,4 ]
Wang Z. [2 ]
机构：
[1] Shenzhen Water (Group) Co., Ltd., Shenzhen
[2] State Key Laboratory of Hydro-science and Engineering, Tsinghua University, Beijing
[3] Key Laboratory of Yellow River Sedimentation of the Ministry of Water Resources, Zhengzhou
[4] School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha
来源：
Li, Zhiwei (lzhiwei2009@163.com) | 1600年 / International Research and Training Center on Erosion and Sedimentation and China Water and Power Press卷 / 28期
关键词：
Bed load transport; Energy dissipation; Field experiment; Mountain stream; Step-pool system;
D O I：
10.14042/j.cnki.32.1309.2017.03.003
中图分类号：
学科分类号：
摘要：
Step-pool system is a typical bed micro-morphology in high gradient mountain rivers, which creates extremely high turbulence intensity and thus dissipates a majority the flow energy. The increase of the bed load transport intensity changed the flow field and reshaped the bedform, thus the energy dissipation effect of the step-pool system changed. A physical model of artificial step-pool system was constructed in a locally regular channel of the upper Wenxia River, a tributary of Han River in the middle Yangtze River. Experiments were conducted to study the flow field and energy dissipation in different flow discharges and bed load transport rates. Experimental results illustrated that the increase of bed load transport intensity significantly changed local flow field in the step and pool. The turbulence intensity on the step increased and the turbulence intensity in the pool decreased sharply. The increase of bed load transport intensity leaded to variation of the energy dissipation distribution. The energy dissipated by bed load transport increased, thus the energy dissipation effect of the bed structure of step-pool system decreased and the pool of the step-pool system was filled up. © 2017, Editorial Board of Advances in Water Science. All right reserved.
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页码：338 / 345
页数：7
相关论文
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