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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Incipient motion and bed load transport of non-uniform sediment
Incipient motion and bed load transport of non-uniform sediment
Author : HUANG Tingjie(1),(2), LU Yongjun(1), LU Yan(1)
ABSTRACT£ºThis study explores characteristics of incipient motion and transport of non-uniform sediments analytically
and experimentally. A review of published studies on non-uniform sediment transport is first submitted for better
understand the state-of-the-art in this area of research. A new formula to calculate the critical shear stress and another
to predict frictional bed load transport rate of non-uniform bed materials has been proposed with the aid of experiments.
A modification of Wu et al.¡¯s formula to calculate the critical shear stress of incipient motion of non-uniform was
proposed. After that, a new formula to calculate the critical shear stress of individual fractions of non-uniform sediment
was established, considering factors of grain size and gradation of bed materials and the different threshold of incipient
motion for uniform sediment with various diameters. A new fractional non-uniform sediment bed load transport formula
based on energy balance theory was proposed. A wide range of laboratory and field data agree well with this theoretical
equation. Good agreement is achieved with the newly proposed formula for uniform sediment.
File Size : 673,034 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 27/08/2015
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