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C. Neill, M. Yalin (1969)
Quantitative Definition of Beginning of Bed MovementJournal of Hydraulic Engineering, 95
GRASS GRASS (1970)
Initial instability of fine bed sandProc. Am. Soc. civ. Engrs, 96
Filip Hjulstrom (1955)
Transportation of Detritus by Moving Water
W. Chepil (1959)
Equilibrium of Soil Grains at the Threshold of Movement by WindSoil Science Society of America Journal, 23
INMAN INMAN (1949)
Sorting of sediments in the light of fluid mechanicsJ. sedim. Petrol, 19
WHITE WHITE (1940)
The equilibrium of grains on the bed of a streamPhil. Trans. R. Soc. Ser. A, 174
CHEPIL CHEPIL (1959)
Equilibrium of soil grains at the threshold of movement by windSoil Sci. Soc. America Proc., 23
A. Paintal (1971)
A Stochastic Model Of Bed Load TransportJournal of Hydraulic Research, 9
S. White (1970)
Plane Bed Thresholds of Fine Grained SedimentsNature, 228
KRAMER KRAMER (1935)
Sand mixtures and sand movement in fluvial levelsAm. Soc. Civil Engineers Trans., 100
R. Gerard (1974)
Turbulent Flow Near Smooth WallJournal of Engineering Mechanics-asce, 100
EGIAZAROFF EGIAZAROFF (1967)
Sediment transportation mechanics: Initiation of motionProc. Am. Soc. civ. Engrs, 93
Å. Sundborg (1956)
The River Klarälven a Study of Fluvial ProcessesGeografiska Annaler, 38
C. White (1940)
The equilibrium of grains on the bed of a streamProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 174
MANTZ MANTZ (1973)
Cohesionless, fine graded, flaked sediment transport by waterNature, Physical Sci., 246
V. Baker, D. Ritter (1975)
Competence of Rivers To Transport Coarse Bedload MaterialGeological Society of America Bulletin, 86
H. Kim, S. Kline, W. Reynolds (1971)
The production of turbulence near a smooth wall in a turbulent boundary layerJournal of Fluid Mechanics, 50
E. Corino, R. Brodkey (1969)
A visual investigation of the wall region in turbulent flowJournal of Fluid Mechanics, 37
ZINGG ZINGG (1952)
Wind tunnel studies of the movement of sedimentary materialState Univ. of Iowa, Proc. Hydraulics Conf., Studies in Engineering, Bull., 34
A. Grass (1971)
Structural features of turbulent flow over smooth and rough boundariesJournal of Fluid Mechanics, 50
BOGARDI BOGARDI (1965)
European concepts of sediment transportationProc. Am. Soc. civ. Engrs, 91
ZELLER ZELLER (1963)
Einführung in den Sedimenttransport offener GerinneSchweiz. Bauzeitung. Jg., 81
V. Vanoni (1964)
Measurements of critical shear stress for entraining fine sediments in a boundary layer
A. Grass (1970)
Initial Instability of Fine Bed SandJournal of Hydraulic Engineering, 96
KOMAR KOMAR (1970)
The competence of turbidity current flowBull. geol. Soc. Am., 81
E. Lane (1955)
Design of Stable ChannelsTransactions of the American Society of Civil Engineers, 120
NEILL NEILL, YALIN YALIN (1969)
Quantitative definition of beginning of bed movementProc. Am. Soc. civ. Engrs, 95
J. Bogárdi (1972)
Fluvial Sediment Transport, 8
R. Rathbun, H. Guy (1967)
Measurement of hydraulic and sediment transport variables in a small recirculating flumeWater Resources Research, 3
H. Einstein (1950)
The Bed-Load Function for Sediment Transportation in Open Channel Flows, 1026
C. Everts (1973)
Particle Overpassing on Flat Granular BoundariesJournal of the Waterways, Harbors and Coastal Engineering Division, 99
S. Kline, W. Reynolds, F. Schraub, P. Runstadler (1967)
The structure of turbulent boundary layersJournal of Fluid Mechanics, 30
D. Inman (1949)
Sorting of Sediments in the Light of Fluid MechanicsJournal of Sedimentary Research, 19
R. Sternberg (1971)
Measurements of incipient motion of sediment particles in the marine environmentMarine Geology, 10
F. Hjulström (1935)
Studies of the morphological activity of rivers as illustrated by the River Fyris, 25
BAKER BAKER, RITTER RITTER (1975)
Competence of rivers to transport coarse bedload materialBull. Geol. Soc. Am., 86
R. Bagnold (1956)
The flow of cohesionless grains in fluidsPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 249
GREELEY GREELEY, IVERSEN IVERSEN, POLLACK POLLACK, UDOVICH UDOVICH, WHITE WHITE (1974)
Wind tunnel studies of Martian aeolian processesPhil. Trans. R. Soc. Ser. A, 341
P. Komar (1970)
The Competence of Turbidity Current FlowGeological Society of America Bulletin, 81
C. Neill (1968)
Note On Initial Movement Of Coarse Uniform Bed-MaterialJournal of Hydraulic Research, 6
P. Sprent, N. Draper, Harry Smith (1967)
Applied Regression Analysis.Biometrics, 23
EVERTS EVERTS (1973)
Particle overpassing on flat granular boundariesProc. Am. Soc. civ. Engrs, 99
J. Bogárdi (1965)
European Concepts of Sediment TransportationJournal of Hydraulic Engineering, 91
ABSTRACT Carefully selected data for the threshold of sediment movement under unidirectional flow conditions have been utilized to re‐examine the various empirical curves that are commonly employed to predict this threshold. After a review of the existing data, we employed only that data obtained from open channel flumes with parallel sidewalls where flows were uniform and steady over flattened beds of unigranular, rounded sediments. Without these restrictions, an unmanageable amount of scatter is introduced. This selected data is used to develop a modified Shields‐type threshold diagram that extends the limits of the original diagram by three orders of magnitude in the grain‐Reynolds number. The equally general but more easily employed Yalin diagram for sediment threshold is also examined. Although the Shields and Yalin diagrams are general in that they apply to a wide range of different liquids, in both cases somewhat different curves are obtained for threshold under air than for the liquids. The often used empirical curves of the friction velocity u*, the velocity 100 cm above the bed u100, the bottom stress θt, and Shields’ relative stress θt, all versus the grain diameter D, are limited in their ranges of application to certain combinations of grain density, fluid density, fluid viscosity and gravity. These conditions must be selected before the curves are generated from either the more general Shields or Yalin curves. For example, on the basis of the data selected for use in this paper, empirical threshold relationships for quartz density material in water are where the velocity u100 measured 100 cm above the sediment bed is given in cm/sec and the grain diameter D is in cm. The limitations on any of the threshold relationships are severe. These limitations should be properly understood so that the empirical curves and relationships are not improperly employed.
Sedimentology – Wiley
Published: Aug 1, 1977
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