Research Article
Aug 1972
Temperature Effects in Low-Transport, Flat-Bed Flows
Authors: Brent D. Taylor and Vito A. Vanoni, F.ASCEAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 98, Issue 8
Abstract
Experimental data show that a dimensionless bed-load discharge q*b = qb/U*b Dg can be expressed as a function of a boundary Reynolds number R*b = U*bDg/ν and a dimensionless shear stress τ*b = τob/(γs-γ)Dg in which qb = bedload discharge in volume per unit-width and time; U*b = (τob/ρ)1/2 = shear velocity; τob = bed shear stress; ρ = density of the water; Dg = geometric mean size of sediment, ν = kinematic viscosity in the water, and γ and γs are, respectively, the specific weight of water and sediment. Contours of Q*b plotted on a Shields graph (i.e., τ* vs R*b) have the same shape as the Shields curve and the contour, q*b = 10-2, follows it closely. The effect of temperature on τo and qsb is shown by the data. For R*b < 20 increase in the temperature of a flow results in a decrease in τo and τ*b and an increase in R*b, qsg and q*b. For 20 < R*b < 200 an increase in water temperature results in an increase in τob, τ*b and R*b and a decrease in qsb and q*b > 200 there is no temperature effect.
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Published In
Journal of the Hydraulics Division
Volume 98 • Issue 8 • August 1972
Pages: 1427 - 1445
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Aug 1972
Published online: Feb 3, 2021
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Authors
Affiliations
Brent D. Taylor
Lt. (j.g.) C.E.C., U.S. Navy; formerly, Grad. Research Asst., W. M. Keek Laboratory of Hydraulics and Water Resources, California Institute of Technology, Pasadena, Calif.
Vito A. Vanoni, F.ASCE
Prof. of Hydraulics, W. M. Keck Laboratory of Hydraulics and Water Resources, California Institute of Technology, Pasadena, Calif.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.