Laboratory Studies On Transverse Mixing In Rivers

This paper describes some laboratory studies which were made with non-buoyant tracers to investigate the mixing under simulated stream conditions and the possible significance of mechanisms which are in addition to bedshear turbulence and which contribute to the transverse mixing. Experiments were conducted for a straight rectangular flume with simulated groins, and an undistorted, fixed bed river model with groins. It is anticipated that prototype experiments, some of which correspond to item 2, will be reported at a later date.