Experimental Study on Sediment Transport in Meandering Channels

To study sediment transport in spiral flow structures and the consequent bed deformation in curved channels, a series of experiments is carried out in two sine-generated laboratory channels, representing 'mildly' and 'highly'sinuous channels respectively. The velocities are measured using ADV. The bed is paved with 2mm uniform sand particles. Those particles are painted with various colors according to their original position. Amounts of particles transporting longitudinally and transversely in the curved channels are counted by using an image processing software. The topography is found mainly created by the gradient of the primary flow rather than the secondary currents.