Relation between Mean and Maximum Velocities in a Natural River
This article has a reply.
VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 123, Issue 8
Abstract
The cross-sectional mean velocity is an important variable in open-channel hydraulics, whereas the maximum velocity in a channel cross section is mentioned very little. However, the maximum velocity in a channel cross section might be as important as the cross-sectional mean velocity. This is because the measurable maximum velocity can be considered as a “signal,” from which one can know the range of the velocity in a channel cross section. This study explored the relation between the cross-sectional mean and maximum velocities in a natural river by using velocity data collected from the Mississippi River. The relation of the maximum velocity to the cross-sectional mean velocity on different straight reaches in the Mississippi River is perfectly linear. The relation of the maximum velocity to the cross-sectional mean velocity on different river bends is still linear and changes with the rc/B value slightly. The conclusions are preliminary because of the limited amount of data.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bhowmik, N. G. (1979). “Hydraulics of flow in the Kaskaskia River, Illinois.”Ill. St. Water Survey Contract Rep., 91, Champaign, Ill.
2.
Chiu, C.-L.(1988). “Entropy and 2-D velocity distribution in open channels.”J. Hydr. Engrg., ASCE, 114(7), 738–756.
3.
Chiu, C.-L.(1989). “Velocity distribution in open channel flow.”J. Hydr. Engrg., ASCE, 115(5), 576–594.
4.
Chiu, C.-L., and Murray, D. W.(1992). “Variation of velocity distribution along nonuniform open-channel flow.”J. Hydr. Engrg., ASCE, 118(7), 989–1001.
5.
Chiu, C.-L., and Said, C. A.(1994). “Modeling of maximum velocity in open-channel flow.”Proc., Hydr. Div. Conf., Vol. 1, New York, N.Y., 1, 381–385.
6.
Chiu, C.-L., and Said, C. A.(1995). “Maximum and mean velocities and entropy in open-channel flow.”J. Hydr. Engrg., ASCE, 121(1), 26–35.
7.
Chiu, C.-L., Lin, G.-F., and Lu, J.-M.(1993). “Application of probability and entropy concept in pipe-flow study.”J. Hydr. Engrg., ASCE, 119(6), 742–756.
8.
Prandtl, L.(1925). “Bericht über Untersuchungen zur ausgebildeten Turbulenz.”Zeitschrift fur Angewanate Mathematik und Mechanik, Berlin, Germany, 5(2), 136.
9.
Streeter, V. L., and Wylie, E. B. (1979). Fluid mechanics. McGraw-Hill Inc., New York, N.Y.
10.
Yen, B.-C. (1965). “Characteristics of subcritical flow in a meandering channel.”Proj. Rep. G-18988, Inst. of Hydr. Res., Univ. of Iowa, Iowa City, Iowa.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 123 • Issue 8 • August 1997
Pages: 720 - 723
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Aug 1, 1997
Published in print: Aug 1997
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.