FLOW CHARACTERISTICS IN SWASH OF TRANSIENT LONG WAVES
AbstractThe flow of water on a beach is of fundamental importance in coastal engineering. It controls the sediment transport and hence beach morphology. It also affects coastal structures through forces imparted on them and coastal flooding when beach overtopping occurs. The most common approach to numerically model this flow is to use depth-averaged equations (also known as shallow water equations). However, there is a lack of fundamental understanding of the flow produced by different transient wave forms. A better understanding would lead to better validation of numerical models. It would also allow engineers to more easily evaluate fluid forces on coastal structures and the risks of beach overtopping without the need to carry out expensive numerical simulations.
Peregrine (1972): Equations for water waves and the approximations behind them. In Waves on Beaches and Resulting Sediment Transport, pp. 95-121
Pujara, Liu & Yeh (2015): The swash of solitary waves on a plane beach: flow evolution, bed shear stress and run-up. Journal of Fluid Mechanics, vol. 779, pp. 556-597
Guard & Baldock (2007): The influence of seaward boundary conditions on swash zone hydrodynamics. Coastal Engineering, vol. 54, pp. 321-331