Results 241 to 250 of about 3,652,993 (292)

Bed load transport by bed form migration

Acta Geophysica, 2012
A theoretically-based methodology is presented for the determination of bed load transport from high-resolution measurements of bed surface elevations for steady-state or developing dunes. The methodology is based on the general form of the Exner equation for sediment continuity and requires information on the distribution of sediment volume ...
Jochen Aberle, Stephen E. Coleman, Vladimir I. Nikora   +2 more
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Formulas for the Transportation of Bed Load

Journal of Hydraulic Engineering, 2017
AbstractThis paper introduces new formulas for the transportation of bed load that disputes Einstein’s use of his time factor, tE, in calculating transport rate.
Chong-Hung Zee, Raymond Zee
openaire   +1 more source

Bed‐Load and Suspended‐Load Transport of Nonuniform Sediments

Journal of Hydraulic Engineering, 1991
Methods are available for the computation of the bed-load and suspended-load transport rates of uniform sediments. However, limited studies exist for nonuniform sediments. These studies, in general, lack simplicity, and often make use of various correction factors to be read from a series of tables and graphs.
Prabhata K. Swamee, Chandra Shekhar P. Ojha   +1 more
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On transport of bed load by waves

Journal of Hydraulic Research, 1989
The Bagnold's energy concept for sediment transport is used to estimate the volume of sediment mobilized by strong wave action. The results are compared with wave tunnel data for sheet flow conditions and with bed load formulae by Sleath and by Madsen and Grant. The predictions differ excessively and agreement with wave tunnel data is poor. The results
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Deterministic Uncertainty in Bed Load Transport

Journal of Hydraulic Engineering, 1999
A methodology for detecting nonlinear dynamics in bed load transport rate time series and testing the ability of distribution functions to characterize rate variations is outlined. The Kolmogorov entropy of a time series consisting of >10,000 bed load transport measurements made in a laboratory flume indicates that >80% of the variability can be ...
Basil Gomez, Jonathan D. Phillips
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Bed Load Transport in a River Meander

Water Resources Research, 1984
Bed load transport in Muddy Creek, Wyoming, a sand‐bedded meandering river with equilibrium bottom topography, was found to consist of a zone of maximum sediment flux that shifted across the channel from near the inside bank in the upstream part of the bend toward the pool at the minimum radius of curvature.
William E. Dietrich, J. Dungan Smith
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Fractionwise calculation of bed load transport

Journal of Hydraulic Research, 1996
Extensive experiments conducted by the writers on fractional bed load transport rates are reported. These data as well as those available from other sources, covering wide range of flow conditions and sediment nonuniformity, have been analysed. Firstly, the semi-theoretical model proposed by Misri et al.
P.L Patel, K.G. Ranga Raju
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The transportation of bed‐load by streams

Eos, Transactions American Geophysical Union, 1934
The problem of bed‐load movement has been studied by a number of engineers and scientists during the past seventy years and a considerable amount of data has been published. The increasing use of river‐ and harbor‐models has accentuated its importance because of the necessity for selecting a material capable of being moved which will not at the same ...
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Nonlinear mechanism of bed load transport

Transactions of Tianjin University, 2009
From the group movement of the bed load within the bottom layer, details of the nonlinear dynamic characteristics of bed load movement are discussed in this paper. Whether the sediment is initiated into motion corresponds to whether the constant term in the equation is equal to zero.
Xu, H, Ng, CO, Bai, Y
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Bed-Load Transport

2014
The mode of sediment transport where the sediment particles slide, roll, or travel in succession of low jumps close to the bed is known as bed-load transport. In this chapter, theories of bed-load and formulations to predict the bed-load transport rate are presented. The pioneering attempt to predict the bed-load transport rate was due to MP du Boys in
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