A Formula for Bed Load Transport Based on the Characteristics of Sediment Particles Position on River Bed

被引：0
|
作者：
Zhou S. [1 ]
Zhang G. [1 ]
Liu Y. [1 ]
Wang Y. [1 ]
机构：
[1] College Of Water Resources And Architectural Engineering, Northwest A&F University, Yangling
来源：
Zhang, Genguang (zgg64@163.com) | 1600年 / Editorial Board of Journal of Basic Science and卷 / 28期
关键词：
Bed load; Exposure angle; Incipient probability; Sediment particles position on river bed; Sediment transport; Uniform sediment;
D O I：
10.16058/j.issn.1005-0930.2020.05.004
中图分类号：
学科分类号：
摘要：
The three-dimensional model of sediment particles position was set up based on the characteristics of sediment particles position on river bed, and the concepts of exposure angle, drag direction angle and relative gravity arm were defined. The position parameters between particles were obtained by using the image processing method, and the probability distributions of exposure angle and drag direction angle were calculated. A theoretical formula for calculating the incipient probability of surface bed sediment and unit bed area was established based on the statistical results of particles position and the random characteristics of flow. The critical flow conditions of the single-layer sediment transport model and the multi-layer sediment transport model were presented. A formula for uniform bed load transport rate was derived, based on the new physical pattern of bed load transport. The agreement of the computation results with the experimental data indicates this formula could be used to estimate the bed load transport rate effectively. © 2020, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
引用
收藏
页码：1045 / 1056
页数：11
相关论文
共 42 条
  • [1] Duboys P., Etudes du regime du rhone et 1'aotion exercée par less laux sur un lit a fond de graviers undefiniment affouillable, Annales Des Pontset Chausses, 5, pp. 141-195, (1879)
  • [2] Dey S., Fluvial hydrodynamics: hydrodynamic and sediment transport phenomena, pp. 187-326, (2014)
  • [3] Dey S, Ali S Z., Mechanics of sediment transport: Particle scale of entrainment to continuum scale of bedload flux, Journal of Engineering Mechanics, 143, 11, (2017)
  • [4] Meng Z, Li D X, Wang X K., Modification of the Engelund bed-load formula, International Journal of Sediment Research, 31, pp. 251-256, (2016)
  • [5] Meter-Peter E, Muller R., Formulas for bed-load transport, Proceedings of the Second Meeting of International Association for Hydraulic Research, 3, pp. 39-64, (1948)
  • [6] Parker G., Self-formed straight rivers with equilibrium banks and mobile bed: Part2. The gravel river, Journal of Fluid Mechanics, 89, 1, pp. 127-146, (1978)
  • [7] Cheng N S., Exponential formula for bed load transport, Journal of Hydraulic Engineering, 128, 10, pp. 942-946, (2002)
  • [8] Huang H Q., Reformulation of the bed load equation of Meyer-Peter and Müller in light of the linearity theory for alluvial channel flow, Water Resources Research, 46, (2010)
  • [9] Knack I, Shen H T., Sediment transport in ice-covered channels, International Journal of Sediment Research, 30, 1, pp. 63-67, (2015)
  • [10] Einstein H A., The bed-load function for sediment transportation in open channel flows, Technical Bulletins 156389, 1026, pp. 29-35, (1950)
12345