Bed Evolution in Channel Bends
Publication: Journal of Hydraulic Engineering
Volume 116, Issue 4
Abstract
A numerical model for simulation of temporal bed evolution in channel bends with fixed walls is constructed and verified with laboratory experiments. The model is based on governing equations of flow and sediment motion, with some simplifying assumptions. Numerical experiments are conducted, using the model to investigate influences of various factors on bed evolution. It is found that the process of bed evolution in channel bends with steady discharge and uniform sediment can be approximated by a complementary exponential decay function of a time parameter. A regression equation is established for the coefficient as a function of flow condition, bend geometry, and sediment size. These relations, the numerical model, or both, may be applied to evaluate evolution of bed topography in river bends. Numerical results are also verified with laboratory experiments.
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References
1.
Ali, A. M. (1985). “Longitudinal and transverse variations of secondary and depth‐averaged flows in meandering channels,” thesis presented to University of Tokyo, at Tokyo, Japan, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2.
Blondeaux, P., and Seminara, G. (1985). “A unified bar‐bend theory of river meanders.” J. Fluid Mech., 157, 449–470.
3.
de Vriend, H. J. (1976). “A mathematical model of steady flow in curved shallow channels.” Report No. 76‐1, Laboratory of Fluid Mechanics, Delft Univ. of Technology.
4.
Engelund, F. (1967). Closure to “Hydraulic resistance of alluvial streams.” J. Hydr. Div., ASCE, 93(4), 287–296.
5.
Engelund, F., and Hansen, E. (1967). “A monograph on sediment transport in alluvial streams.” Teknisk Vorlag, Copenhagen, Denmark.
6.
Engelund, F. (1974). “Flow and bed topography in channel bends.” J. Hydr. Div., ASCE, 100(11), 1631–1648.
7.
Falcon Acsanio, M. (1979). “Analysis of flow in alluvial channel bends,” thesis presented to University of Iowa, at Iowa City, Iowa, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
8.
Ho, S. Y. (1987). “Flow characteristics and evolution of bed topography in meandering channels with fixed banks,” thesis presented to National Taiwan University, at Taipei, Taiwan, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
9.
Huang, W. H., Robertson, J. M., and McPherson, M. B. (1967). “Some analytical results for plane 90° bend flow.” J. Hydr. Div., ASCE, 93(6), 169–185.
10.
Ikeda, S., and Nishimura, T. (1985). “Bed topography in bends of sand‐silt rivers.” J. Hydr. Engrg., ASCE, 111(11), 1397–1411.
11.
Ikeda, S., and Nishimura, T. (1986). “Flow and bed profile in meandering sand‐silt rivers.” J. Hydr. Engrg., ASCE, 112(7), 562–579.
12.
Ikeda, S., Yamasaka, M., and Chiyoda, M. (1987). “Bed topography and sorting in bends.” J. Hydr. Engrg., ASCE, 113(2), 190–206.
13.
Kikkawa, H., Ikeda, S., and Kitagawa, A. (1976). “Flow and bed topography in curved open channels.” J. Hydr. Div., ASCE, 102(9), 1327–1342.
14.
Lovera, F., and Kennedy, J. F. (1969). “Friction‐factors for flat‐bed flows sand channels.” J. Hydr. Div., ASCE, 95(4), 1227–1234.
15.
Leschziner, M. A., and Rodi, W. (1979). “Calculation of strongly curved open channel flow.” J. Hydr. Div., ASCE, 105(10), 1297–1314.
16.
Nunner, W. (1956). “Warmeubergang und Druckabfall in Rauhen Rohern.” VDI‐Forschungscheft 455, B, Band 2 (in German).
17.
Odgaard, A. J. (1981). “Transverse bed slope in alluvial channel bends.” J. Hydr. Div., ASCE, 107(12), 1677–1694.
18.
Odgaard, A. J. (1986a). “Meander flow model. I: Development.” J. Hydr. Engrg., ASCE, 112(12), 1117–1136.
19.
Odgaard, A. J. (1986b). “Meander flow model. II: Applications.” J. Hydr. Engrg., ASCE, 112(12), 1137–1150.
20.
Onishi, Y., Jain, S. C., and Kennedy, J. F. (1976). “Effects of meandering in alluvial streams.” J. Hydr. Div., ASCE, 102(7), 899–917.
21.
Parker, G. (1984). Discussion of “Lateral bed load transport on side slopes,” by Syunsuke Ikede. J. Hydr. Engrg., ASCE, 110(4), 197–199.
22.
Rozovskii, I. L. (1961). Flow of water in bends of open channels, Academy of Sciences of Ukranian, Soviet Socialist Republic, Kiev, Soviet Union.
23.
Smith, J. D., and McLean, S. R. (1984). “A model for flow in meandering streams.” Water Resour. Res., 20(9), 1301–1315.
24.
Steffler, P. M., Rajaratnam, N., and Peterson, A. W. (1985), “Water surface at change of channel curvature.” J. Hydr. Engrg., ASCE, 111(5), 866–870.
25.
Struiksma, N., Olesen, K. W., Flokstra, C., and de Vriend, H. J. (1985). “Bed deformation in curved alluvial channels.” J. Hydr. Res., 23(1), 57–79.
26.
Tamai, N., and Ikeya, T. (1985). “A mathematical model of a three‐dimensional flow over bars in meandering channels.” 21st IAHR Congress, International Association of Hydraulic Researchers, 2, 75–80.
27.
Yen, B. C. (1965). “Characteristics of subcritical flow in a meandering channel,” Iowa Institute of Hydraulic Research, Univ. of Iowa, Iowa City, Iowa.
28.
Yen, C. L. (1967). “Bed configuration and characteristics of subcritical flow in a meandering channel,” thesis presented to the University of Iowa, at Iowa City, Iowa, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
29.
Yen, C. L. (1970). “Bed topography effect on flow in a meander.” J. Hydr. Div., ASCE, 96(1), 57–73.
30.
Yen, C. L., and Yen, B. C. (1971). “Water surface configuration in channel bends.” J. Hydr. Div., ASCE, 97(2), 303–321.
31.
Yen, C. L., and Ho, S. Y. (1988). “Variation of some flow characteristics in channel bends.” Proc., 6th IAHR‐APD Congress, II(1), 301–308.
32.
Zimmermann, C., and Kennedy, J. F. (1978). “Transverse bed slopes in curved alluvial streams.” J. Hydr. Div., ASCE, 104(1), 33–48.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 116 • Issue 4 • April 1990
Pages: 544 - 562
Copyright
Copyright © 1990 ASCE.
History
Published online: Apr 1, 1990
Published in print: Apr 1990
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