No abstract

New experiments with graded sand was conducted in the large oscillating tunnel of Delft Hydraulics. The measured transport rates show that size gradation of sand particles has a minor effect on the net transport rates. On the other hand the transport rates of the fine fraction is reduced due to the presence of coarse particles. Coarse particles are more transported with different velocities resulting in a coarser composition for the transported sand compare to the original sand bed. Comparing the new results with three different transport models show that using the hiding/exposure correction factor of Day with the model of Ribberink leads to a better predictions for the composition of the transported sand. Using the model of Dibajnia & Watanabe overestimates the transport rates of the two fractions under investigation.