Author(s): S. J. Tait; B. B. Willetts
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Abstract: This paper reports on flow velocity measurements made over a stabilising bed, in particular the differences in the near bed flow environment during periods of intense sediment activity and of virtually no sediment activity. Particular consideration was given to changes in the magnitude of the range of velocity fluctuations and the effect this had on the ability of the flow to entrain grains. It provides indications that grain scale turbulence features are an important factor in determining grain entrainment thresholds and thus transport and readjustment of river channel forms at a larger scale.
Year: 1995