Abstract
The influence of saturated-unsaturated sloped beach on sediment transport in swash zone is investigated experimentally and numerically. The movement of fluorescent sand on seabed and the orbit of fluorescent paint injected into sandy beach are measured in bore wave experiments. As the result, the uplift seepage flow leads to the activation of sediment transport in the direction of run-up and backwash under the saturated slope. The numerical modelling simulates the interacting swash wave motion and saturated-unsaturated coastal seepage flow. The tractive force under the influence of seepage flow is quantified through a permeable Shields parameter. The results of prediction are in good qualitative agreement with those of experiments.References
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