Bed Topography and Sorting in Bends
Publication: Journal of Hydraulic Engineering
Volume 113, Issue 2
Abstract
A mathematical model for defining the bed topography and the bed material size distribution in uniformly curved bends of alluvial rivers is developed, in which the coarsening of sediment size toward the outside bank is predicted and the bed topography is calculated coupling with the lateral sorting. The major agency for the sorting is that coarser grains feel a larger ratio of transverse gravitational force to fluid force than finer grains. It is revealed that the sorting reduces the depth of scour considerably in the outer area of bends. The model is tested with a laboratory test, and it is applied to an actual river, both of which support the current theory.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Allen, J. R. L., “Studies in Fluviatile Sedimentation: A Comparison of Fining upwards Cyclothems, with Special Reference to Coarse‐Member Composition and Interpretation,” Journal of Sedimentary Petrology, Vol. 40, 1970, pp. 298–323.
2.
Bridge, J. S., “Bed Topography and Grain Size in Open Channel Bends,” Sedimentology, Vol. 23, 1976, pp. 407–414.
3.
Bridge, J. S., and Jarvis, J., “The Dynamics of a River Bend: A Study in Flow and Sedimentary Processes,” Sedimentology, Vol. 29, 1982, pp. 499–541.
4.
Dietrich, W. E., Smith, J. D., and Dunne, T., “Flow and Sediment Transport in a Sand Bedded Meander,” Journal of Geology, Vol. 87, 1979, pp. 305–315.
5.
Egiazaroff, I. V., “Calculation of Nonuniform Sediment Concentrations,” Journal of the Hydraulics Division, ASCE, Vol. 91, No. 4, Apr., 1965, pp. 225–247.
6.
Engelund, F., “Flow and Bed Topography in Channel Bends,” Journal of the Hydraulics Division, ASCE, Vol. 100, No. 11, Nov., 1974, pp. 1631–1648.
7.
Ikeda, S., and Nishimura, T., “Bed Topography in Bends of Sand‐Silt Rivers,” Journal of Hydraulic Engineering, ASCE, Vol. 111, No. 11, Nov., 1985, pp. 1397–1411.
8.
Jackson, R. G., “Velocity‐Bed Form‐Texture Pattern of Meander Bends in the Lower Wabash River of Illinois and Indiana,” Geological Society of America Bulletin, Vol. 86, 1975, pp. 1511–1522.
9.
Jackson, R. G., “Unsteady‐Flow Distributions of Hydraulic and Sedimentologic Parameters across Meander Bends of the Lower Wabash River, Illinois‐Indiana USA,” Proceedings of the International Symposium on Steady Flow in Open Channels, BHRA Fluid Engineering, Cranfield, Bedford, England, 1976, pp. G4 · 35–48.
10.
Kikkawa, H., Ikeda, S., and Kitagawa, A., “Flow and Bed Topography in Curved Open Channels,” Journal of the Hydraulics Division, ASCE, Vol. 102, No. 9, Sept., 1976, pp. 1327–1342.
11.
Kikkawa, H., Ikeda, S., Ohkawa, H., and Kawamura, Y., “Secondary Flow in a Bend of Turbulent Stream,” Proceedings of Japan Society of Civil Engineers, No. 219, 1973, pp. 107–114.
12.
Odgaard, A. J., “Transverse Bed Slope in Alluvial Channel Bends,” Journal of the Hydraulics Division, ASCE, Vol. 107, No. 12, Dec., 1981, pp. 1677–1694.
13.
Odgaard, A. J., “Bed Characteristics in Alluvial Channel Bends,” Journal of the Hydraulics Division, ASCE, Vol. 108, No. 11, Nov., 1982, pp. 1268–1281.
14.
Parker, G., and Andrews, E. D., “Sorting of Bed Load Sediment by Flow in Meander Bends,” Water Resources Research, Vol. 21, No. 9, Sept., 1985, pp. 1361–1373.
15.
Rouse, H., Ed., Engineering Hydraulics, 1st ed., John Wiley and Sons, Inc., New York, N.Y., 1965, 781 pp.
16.
Vanoni, V. A., Ed., Sedimentation Engineering, ASCE Manuals and Report on Engineering Practice, No. 54, 1975, 96 pp.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 113 • Issue 2 • February 1987
Pages: 190 - 204
Copyright
Copyright © 1987 ASCE.
History
Published online: Feb 1, 1987
Published in print: Feb 1987
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.