MODELLING TRANSPORT OF SEDIMENT MIXTURES IN CURRENT AND WAVES

An existing deterministic intra-wave sediment transport model is validated against detailed measurements of total-load transport rates of poorly- and widely-graded sediment mixtures in the sheet-flow regime under asymmetric waves and sinusoidal waves superimposed by a current. Special attention is given to two key elements of the model: the reference concentration for suspended sediment and the description of the suspended load for sediment mixtures.