Comparison of Different Methods to Calculate Bed Shear Stress

Precise velocity profile measurements were carried out in a fully developed, subcritical and supercritical flow on a smooth and a rough bed in a flume with a rectangular cross section. In both cases different approaches were used to calculate the friction velocity, u*, and comparisons were made. The...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 1992-01, Vol.25 (8), p.131-140
Main Authors: Kabir, M R, Torfs, H
Format: Article
Language:English
Subjects:
Bottom stress
Experiments
Flumes
Friction
Grain size
Hydraulics
Laboratories
Mathematical analysis
Pressure transducers
Rapid flow
Reference levels
Sediments
Sewer systems
Shear stress
Supercritical flow
Velocity
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Precise velocity profile measurements were carried out in a fully developed, subcritical and supercritical flow on a smooth and a rough bed in a flume with a rectangular cross section. In both cases different approaches were used to calculate the friction velocity, u*, and comparisons were made. The influence of the reference level (hypothetical bed level) has been discussed. Friction velocities calculated from the velocity profile are very sensitive to the hypothetical bed level. For a smooth bed the determination of the reference level does not present any difficulties. However, for a rough bed this level shows dependency on the channel slope.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1992.0187