Bed load graduation of sandy bed in alluvial river

被引：0
作者：
Zhang L. [1 ]
Zhang H. [2 ]
Zhao C. [3 ]
机构：
[1] College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing
[2] State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing
[3] School of Civil and Environment Engineering, Beijing University of Science and Technology, Beijing
来源：
| 1600年 / International Research and Training Center on Erosion and Sedimentation and China Water and Power Press卷 / 48期
关键词：
Bed load; Graduation; Momentum; Sandy bed; Turbulence;
D O I：
10.13243/j.cnki.slxb.20170468
中图分类号：
学科分类号：
摘要：
Bed load graduation of sandy bed in alluvial river is a key in the calculations such as bed load transport rate, riverbed erosion and siltation. In this paper, pattern of critical condition of sediment trans- port in near-wall region of sandy bed was analyzed firstly, and according to the law of momentum balance,the critical settling-rising condition of bed material in sandy bed was obtained. Based on the vertical instantaneous turbulent velocity abiding by Gaussian distribution, a theoretical relation for calculating bed load graduation in sandy bed was addressed by solving the stochastic equation. The formulae were verified by measured data from the Yellow and Yangtze Rivers, and the results showed that the measured data agreed well with proposed formulae. This study has theoretical significance and practical value for determining bed load graduation of sandy bed in alluvial river. © 2017, China Water Power Press. All right reserved.
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页码：1465 / 1472
页数：7
相关论文
共 4 条
  • [1] Gessler J., The beginning of bedload movement of mixtures investigated as natural armoring in channels, (1967)
  • [2] Gessler J., Self-stabilizing tendencies of alluvial channels, Journal of the Waterways Harbors & Coastal En- gineering Division, 96, 2, pp. 235-249, (1970)
  • [3] Diplas P., Dancey C.L., Celik A.O., Et al., The role of impulse on the initiation of particle movement under tur- bulent flow conditions, Science, 322, 5902, pp. 717-720, (2008)
  • [4] Shevelev F.A., Investigation of the Basic Hydraulic Regularities of Turbulent Motion in Pipes, (1953)
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