Velocity and Turbulence Measurements for Two Overbank Flow Events in River Severn
Publication: Journal of Hydraulic Engineering
Volume 128, Issue 10
Abstract
Field measurements of velocity and turbulence have been carried out in a study reach of the River Severn at Lower Farm near Shrewsbury during overbank flow. Acoustic Doppler velocity meters have been used for the field measurements of velocity and turbulence, particularly in the interface region between river channel and floodplain. The values of local shear velocity and roughness length for the reach under study were calculated using measured velocity data. The distributions of turbulent intensities, and the Reynolds stresses are also presented. The variation of horizontal shear stress in the vertical direction deviates from linear for the main channel/floodplain interaction region due to the existence of a lateral shear and momentum transfer from the floodplain towards the main channel. Comparisons are made between the field data and previous experimental data from the Flood Channel Facility.
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References
Bergeron, N. E., and Abrahams, A. D.(1992). “Estimating shear velocity and roughness length from velocity profiles.” Water Resour. Res., 28(8), 2155–2158.
Coles, D.(1956). “The law of the wake in the turbulent boundary layer.” J. Fluid Mech., 1, 191–226.
Ervine, D. A., Babaeyan-Koopaei, K., and Sellin, R. H. J.(2000). “Two-dimensional solution for straight and meandering overbank flows.” J. Hydraul. Eng., 126(9), 653–669.
Knight, D. W.(1999). “Flow mechanisms and sediment transport in compound channels.” Int. J. Sediment Res., 14(2), 217–236.
Knight, X., Shiono, X., (1990). “Turbulence measurements in a shear layer region of a compound channel.” J. Hydraul. Res., 28(2), 175–196.
Morvan, H. (2001). “Three dimensional modelling of rivers.” PhD thesis, Univ. of Glasgow, Glasgow, U.K.
Muto, Y. (1997). “Turbulent flow in two-stage meandering channels.” PhD thesis, Univ. of Bradford, Bradford, U.K.
Nezu, I., and Nakagawa, H. (1993). Turbulence in open-channel flows, Balkema, Rotterdam, The Netherlands.
Nikora, V. I., and Goring, D. G.(1998). “ADV measurements of turbulence: can we improve their interpretation?” J. Hydraul. Eng., 124(6), 630–634.
Nikora, V. I., and Smart, G. M.(1997). “Turbulence characteristics of New Zealand gravel-bed rivers.” J. Hydraul. Eng., 123(9), 764–773.
Nikuradse, J.(1933). “Stroemumgsgesetze in raughen Roehren.” Forsh. Geb. Ingenieurwes., 361 (translated from German).
Sellin, R. H. J., Ervine, D. A., and Willetts, B. B.(1993). “The behaviour of two-stage channels.” Proc. Inst. Civ. Eng., Waters. Maritime Energ., 101(2), 99–112.
Shiono, K., and Knight, D. W. (1989) “Two dimensional analytical solution for a compound channel.” Proc., 3rd Int. Symp. on Refined Flow Modelling and Turbulence Measurements, 591–599.
Shiono, K., and Knight, D. W.(1991). “Turbulent open channel flows with variable depth across the channel.” J. Fluid Mech., 222, 617–646.
Smart, G. M.(1999). “Turbulent velocity profiles and boundary shear in gravel bed rivers.” J. Hydraul. Eng., 125(2), 106–116.
Song, T., and Graf, W. H.(1996). “Velocity and turbulence distribution in unsteady open-channel flows.” J. Hydraul. Eng., 122(3), 141–154.
Tu, H., and Graf, W. H.(1992). “Velocity distribution in unsteady open-channel flow over gravel beds.” J. Hydrosci. Hydr. Eng., 10(1), 11–25.
van Rijn, L. C.(1982). “Equivalent roughness of alluvial bed.” J. Hydraul. Eng., 108(10), 1215–1218.
Ward, R. C. (1981). “River systems and river regimes.” British rivers, J. Lwin, ed., George Allen and Unwin, London, 1–33.
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Information
Published In
Journal of Hydraulic Engineering
Volume 128 • Issue 10 • October 2002
Pages: 891 - 900
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jul 30, 2001
Accepted: Apr 8, 2002
Published online: Sep 13, 2002
Published in print: Oct 2002
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