Modification of the Engelund bed-load formula

发布时间：2018-06-13 04:50

  本文选题：Bed-load + transport　； 参考：《International Journal of Sediment Research》2016年03期

【摘要】：The classic Engelund bed-load formula involves four oversimplified assumptions concerning the quantity of particles per unit bed area that can be potentially entrained into motion,the probability of sediment being entrained into motion at a given instant,the mean velocity of bed-load motion,and the dimensionless incipient shear stress.These four aspects are reexamined in the light of new findings in hydrodynamics,and a modified bed-load formula is then proposed.The modified formula shows promise as being reliable in predicting bed-load transport rates in a wide range of flow intensities.
[Abstract]:The classic Engelund bed-load formula involves four oversimplified assumptions concerning the quantity of particles per unit bed area that can be potentially entrained into motion,the probability of sediment being entrained into motion at a given instant,the mean velocity of bed-load motion,and the dimensionless incipient shear stress.These four aspects are reexamined in the light of new findings in hydrodynamics,and a modified bed-load formula is then proposed.The modified formula shows promise as being reliable in predicting bed-load transport rates in a wide range of flow intensities.
【作者单位】： State
【基金】：financially supported by National Natural Science Foundation of China(Grant nos.51279081 and 51279012) National Key Technologies R&D Program of China(Grant no.2012BAB04B01)
【分类号】：TV143
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本文编号：2012789