Spatial heterogeneity of near-bed hydraulics above a patch of river gravel

Buffin-Belanger Buffin-Belanger, Stephen Rice, Ian Reid, Jill Lancaster

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The spatial heterogeneity of fully turbulent, near-bed flows above gravel river beds is examined using a realistic replica of a natural gravel patch in a large flume. Three-dimensional velocity time series were obtained at four heights (0.008 - 0.1 m) above the local bed in each of 99 closely spaced verticals for three flows of increasing intensity. The spatial heterogeneity of time-averaged velocities and root-mean-square velocity fluctuations increases under stronger flows and closer to the bed.
Original languageEnglish
Pages (from-to)1 - 12
Number of pages12
JournalWater Resources Research
Issue number4
Publication statusPublished - 2006
Externally publishedYes

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