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.
|Pages (from-to)||1 - 12|
|Number of pages||12|
|Journal||Water Resources Research|
|Publication status||Published - 2006|