Abstract
The riverside concavity zone is often buried by substantial sediment deposition. In this study, a training dike is equipped just upstream entrance of a concavity zone in order to suppress and remove the sand deposition. The effects of a training dike on flow structures and sediment deposition in a side concavity were investigated numerically and experimentally. The length, orientation angle and location distance of the training dike were changed and their influence were examined. The amount of deposition in a concavity was reduced in almost cases by the effect of sweeping flow produced by the training dike, but it happened to be increased in bed-load dominant cases. With an increase of the angle and the velocity strength of induced flow by the training dike, the deposition in a concavity zone becomes small.
