Results 1 to 10 of about 199,649 (303)

The potential rate of bed-load transport. [PDF]

open access: yesProc Natl Acad Sci U S A, 2006
Averages of measurements made in three rivers characterized by a high availability of sediment in relation to runoff, and comparable data that represent the high end of the range of transport rates observed during three sets of laboratory experiments, confirm there is an upper, particle-size-dependent limit to bed-load transport efficiency.
Gomez B.
europepmc   +4 more sources

Quantification of bed-load transport over dunes [PDF]

open access: yesE3S Web of Conferences, 2018
There is disagreement in the literature as to whether a shear stress-based approach can be used to accurately predict sediment transport over dunes. This study aims to address this disagreement.
Lockwood Kenneth   +2 more
doaj   +2 more sources

Development of a machine learning model for river bed load [PDF]

open access: yesEarth Surface Dynamics, 2023
Prediction of bed load sediment transport rates in rivers is a notoriously difficult problem due to inherent variability in river hydraulics and channel morphology.
H. Hosseiny   +3 more
doaj   +1 more source

A bed load transport equation based on the spatial distribution of shear stress – Oak Creek revisit [PDF]

open access: yesEarth Surface Dynamics, 2020
Bed load transport formulations for gravel-bed rivers are often based on reach-averaged shear stress values. However, the complexity of the flow field in these systems results in wide distributions of shear stress, whose effects on bed load transport are
A. Monsalve   +4 more
doaj   +1 more source

Hysteretic Implications for Graded Bed Load Sediment Transport in Symmetrical Hydrograph Flows

open access: yesFrontiers in Environmental Science, 2021
Differential parametric values associated with bed load sediment transport, that result at the same discharge levels on the rising and falling limbs of a flood hydrograph, are usually defined as bed load hysteresis.
Le Wang   +5 more
doaj   +1 more source

Quantitative Study on Bed Load Proppant Transport during Slickwater Hydraulic Fracturing

open access: yesLithosphere, 2021
Bed load proppant transport is a significant phenomenon during slickwater hydraulic fracturing. However, the mechanism of bed load proppant transport is still unclear.
Chunting Liu   +3 more
doaj   +1 more source

Bed-Load Transport Equation on Arbitrarily Sloping Beds [PDF]

open access: yesJournal of Hydraulic Engineering, 2008
This work presents a simple tool to evaluate bed-load transport intensity and direction on arbitrarily sloping beds with local longitudinal and transversal inclinations up to 25° and in the case of uniform sediments and low values of the applied Shields stress.
FRANCALANCI, SIMONA, SOLARI, LUCA
openaire   +1 more source

Bed load transport by submerged jets [PDF]

open access: yesProceedings of the National Academy of Sciences, 1979
Some similarities are presented between the bed load transport of noncohesive grains in long rivers and at a local, jet-induced scour. Experiments are described in which a submerged two-dimensional slot nozzle, inclined downward, eroded a deep sand bed.
J R, Francis, P S, McCreath
openaire   +2 more sources

Bed-load transport modelling by coupling an empirical routing scheme and a hydrological-1-D-hydrodynamic model – case study application for a large alpine valley [PDF]

open access: yesAdvances in Geosciences, 2012
Sediment transport in mountain rivers and torrents is a substantial process within the assessment of flood related hazard potential and vulnerability in alpine catchments.
B. Gems   +5 more
doaj   +1 more source

The role of velocity, pressure, and bed stress fluctuations in bed load transport over bed forms: numerical simulation downstream of a backward-facing step [PDF]

open access: yesEarth Surface Dynamics, 2015
Bed load transport over ripples and dunes in rivers exhibits strong spatial and temporal variability due to the complex turbulence field caused by flow separation at bedform crests.
M. W. Schmeeckle
doaj   +1 more source

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