Sediment Translation Waves in Braided Gravel‐Bed Rivers
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 8
Abstract
Bed‐load transport capacity in braided gravel‐bed rivers varies as hydraulic geometry changes downstream. Differences in capacity lead to variations in bed‐material storage as a consequence of bed‐load transport during floods. In turn, storage changes produce irregular fluctuations in bed‐level or sediment translation waves in the bed material. These waves are the mechanism by which bed load is transported in braided and, in fact, all alluvial rivers with variable downstream hydraulic geometry. An approximate expression for wave velocity indicates that annual wave travel distance can be hundreds of meters or more per year for waves up to 0.5 m high. Although sediment waves cause shifts in bed‐load rating at a cross section, bed‐load yield may still be estimated using bed‐load ratings based on depth‐discharge relations defined for periods between rating changes. A procedure is given for stable channel design in the presence of sediment waves based on equivalence of yield for some period in the design reach and a stable reference reach. The condition that the bed‐load ratings for the two reaches must intersect either aids or allows solutions of the design problem.
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References
1.
Ashmore, P. E. (1985). “Process and form in gravel braided streams: Laboratory modelling and field observations,” PhD thesis, University of Alberta, Edmonton, Alberta, Canada.
2.
Ashmore, P. E. (1988). “Bedload transport in braided gravel‐bed stream models.” Earth Surf. Processes and Landforms, 13(8), 677–695.
3.
Ashmore, P. E. (1991). “Channel morphology and bed load pulses in braided, gravelbed streams.” Geograf. Annaler, 73A(1), 37–52.
4.
Ashworth, P. J., and Ferguson, R. I. (1986). “Interrelationships of channel processes, changes and sediments in a proglacial braided river.” Geograf. Annaler, 68A(4), 361–371.
5.
Bagnold, R. A. (1980). “An empirical correlation of bedload transport rates in flumes and natural rivers.” Proc., Royal Society of London, Series A, 372, 453–473.
6.
Beschta, R. L. (1983). “Long‐term changes in channel widths of the Kowai River, Torlesse Range, New Zealand.” J. Hydrol., New Zealand, 22(2), 112–122.
7.
Carson, M. A., and Griffiths, G. A. (1987). “Bedload transport in gravel channels.” J. Hydrol., New Zealand, 26(1), 1–151.
8.
Carson, M. A., and Griffiths, G. A. (1989). “Gravel transport in the braided Waimakariri River: mechanisms, measurements and predictions.” J. Hydrol., 109(3/4), 201–220.
9.
Church, M., and Jones, D. (1982). “Channel bars in gravel‐bed rivers.” Gravel‐Bed rivers, R. D. Hey, J. C. Bathhurst, and C. R. Thorne, eds., John Wiley and Sons, Inc., Chichester, U.K., 291–338.
10.
Cunge, J. A., Holly, F. M., Jr., and Verwey, A. (1980). Practical aspects of computational hydraulics. Pitman Advanced Publishing Program, London, England.
11.
de Vries, M. (1973). “River‐bed variations—Aggradation and degradation.” Int. Seminar on Hydr. of Alluvial Streams, International Association for Hydraulic Research, 1‐10.
12.
Drage, B., and Carlson, R. F. (1977). “Hydraulic geometry relationships for northern braided rivers.” Proc. 3rd Nat. Hydrotechnical Conf., Quebec City, Quebec, 235–251.
13.
Davies, T. R. H. (1987). “Problems of bed load transport in braided gravel‐bed rivers.” Sediment transport in gravel‐bed rivers, C. R. Thorne, J. C. Bathhurst, and R. D. Hey, eds., John Wiley and Sons, Chichester, U.K., 793–828.
14.
Davies, T. R. H., and Lee, A. L. (1988). “Physical hydraulic modelling of width reduction and bed level change in braided rivers.” J. Hydrol., New Zealand, 27(2), 113–127.
15.
Emmett, W. W., Myrick, R. M., and Meade, R. H. (1980). “Field data describing the movement and storage of sediment in the East Fork River, Wyoming, River hydraulics and sediment transport.” Open File Report, 80, U.S. Geological Survey, Dept. of the Interior, Boulder, Colo.
16.
Engelund, F., and Hansen, E. (1967). A monograph on sediment transport in alluvial streams. Tehnish Vorlag, Copenhagen, Denmark.
17.
Fahnestock, R. K., and Bradley, W. C. (1974). “Knik and Matanuska Rivers, Alaska: A contrast in braiding.” Fluvial geomorphology, M. Morisawa, ed., State Univ. of New York, Binghampton, N.Y., 221–250.
18.
Goring, D. G. (1988). “Waimakariri River flood routing.” Report CR 88.35, Hydrol. Ctr., Dept. of Sci. and Industrial Res., Christchurch, New Zealand.
19.
Gradowczyk, M. H. (1968). “Wave propagation and boundary instability in erodiblebed channels.” J. Fluid Mech., 33(1), 93–112.
20.
Griffiths, G. A. (1979). “Recent sedimentation history of the Waimakariri River, New Zealand,” J. Hydrol., New Zealand, 18(11), 6–28.
21.
Griffiths, G. A. (1989a). “Conversion of braided gravel‐bed rivers to single‐thread channels of equivalent transport capacity.” J. Hydrol., New Zealand, 28(1), 63–75.
22.
Griffiths, G. A. (1989b). “Form resistance in gravel channels with mobile beds.” J. Hydr. Engrg., ASCE, 115(3), 340–355.
23.
Griffiths, G. A. (1991). Waimakariri River floodplain management plan. Canterbury Regional Council, Christchurch, New Zealand.
24.
Gomez, B., Naff, R. L., and Hubbell, D. W. (1989). “Temporal variations in bedload transport rates associated with the migration of bedforms.” Earth Surf. Processes and Landforms, 14(2), 135–156.
25.
Henderson, F. M. (1966). Open channel flow, Macmillan, New York, N.Y.
26.
Hicks, D. M., and Mason, P. D. (1991). Roughness characteristics of New Zealand Rivers. DSIR Marine and Freshwater, Wellington, New Zealand.
27.
Hoey, T. B., and Sutherland, A. J. (1991). “Channel morphology and bedload pulses in braided rivers.” Earth Surf. Processes and Landforms, 16(5), 447–462.
28.
Hong, L. B., and Davies, T. R. H. (1979). “A study of stream braiding.” Bull. Geol. Soc. Am., 90(II), 1839–1859.
29.
Hudson, H. R. (1983). “Elbow River hydrology and sediment transport,” PhD thesis. University of Alberta, Edmonton, Alberta, Canada.
30.
Keulegan, G. H. (1943). “Effect of turbulence and channel slope on translation waves.” J. Res. Nat. Bureau of Standards, 30(1), 461–512.
31.
Leopold, L. B., Wolman, M. G., and Miller, J. P. (1964). Fluvial processes in geomorphology. W. H. Freeman and Co., San Francisco, Calif.
32.
Meade, R. H. (1985). “Wavelike movement of bedload sediment.” Envir. Geol. Water Sci., 7(4), 215–225.
33.
Meyer‐Peter, E., and Müller, R. (1948). “Formulas for bedload transport.” Proc. Int. Ass. Hydraul. Res., 3rd Annual Conf., Stockholm, Sweden, 39–64.
34.
Milne‐Thompson, L. M. (1968). Theoretical hydrodynamics. 5th Ed., Macmillan and Co. Ltd., London, England.
35.
Mosley, M. P. (1978). “Erosion in the southeastern Ruahine Range and its implications for downstream river control.” New Zealand J. Forestry, 23(1), 21–48.
36.
Mosley, M. P. (1982). “Analysis of the effect of changing discharge on channel morphology and instream uses in a braided river, Ohau River, New Zealand.” Water Resour. Res., 18(4), 800–812.
37.
Nakamura, F. (1986). “Analysis of storage and transport processes based on age distribution of sediment.” Trans., Japanese Geomorphological Union, 7‐3, 165–184.
38.
Parker, G. (1976). “On the cause and characteristic scales of meandering and braiding in rivers.” J. Fluid Mech., 76(3), 457–480.
39.
Pickup, G., and Higgins, R. J. (1979). “Estimating sediment transport in a braided gravel channel.” J. Hydrol., 40(3/4), 283–297.
40.
Pickup, G., Higgins, R. J., and Grant, I. (1983). “Modelling sediment transport as a moving wave—The transfer and deposition of mining waste.” J. Hydrol., 60(1/4), 281–301.
41.
Smith, N. D., and Smith, D. G. (1984). “William River: An outstanding example of channel widening and braiding caused by bedload addition.” Geology, 12(2), 78–82.
42.
Smith, N. D., and Southard, J. B. (1982). “Field investigation of braiding and gravel transport in a small outwash stream.” Abstracts, 11th Int. Congress on Sedimentology, International Association of Sedimentologists, Hamilton, Ontario.
43.
Thompson, S. M. (1985). “Transport of gravel by flows up to 500 m3/s, Ohau River, Otago, New Zealand.” J. Hydr. Res., 23(3), 285–303.
44.
van Rijn, L. C. (1989). “The state of the art in sediment transport modelling.” Sediment transport modelling, S. S. Y. Wang, ed., ASCE, New York, N.Y., 13–32.
45.
Weir, G. J. (1983). “One‐dimensional bed wave movement in lowland rivers.” Water Resour. Res., 19(3), 627–631.
46.
White, W. R., and Day, T. J. (1982). “Transport of graded gravel bed materials.” Gravel‐bed rivers, R. D. Hey, J. C. Bathhurst, and C. R. Thorne, eds., John Wiley and Sons Inc., Chichester, U.K., 181–215.
47.
Young, W. J., and Davies, T. R. H. (1990). “Prediction of bedload transport rates in braided rivers: A hydraulic model study.” J. Hydrol., New Zealand, 29(1), 75–92.
Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 8 • August 1993
Pages: 924 - 937
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Sep 14, 1992
Published online: Aug 1, 1993
Published in print: Aug 1993
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