What is wave setting?
Definition of Wave set-up: Elevation of the mean water level at the shoreline due to wave breaking in the surf zone.
What is wave set-up and set down?
An increase/decrease in the mean water level on a beach due to the effects of waves running up the beach and breaking. Set-down occurs prior to breaking, and set-up after breaking. Under some conditions the set- up can be large enough to contribute to local flooding and overtopping of sea defenses.
What causes wave setup?
As a progressive wave approaches shore and the water depth decreases, the wave height increases due to wave shoaling. The radiation stress therefore decreases after the break point, causing a free surface level increase to balance: wave setup.
What does wave run-up mean?
Definition of Wave run-up: Wave run-up is the maximum onshore elevation reached by waves, relative to the shoreline position in the absence of waves.
What is the difference between wave setup and wave setdown?
In fluid dynamics, wave setup is the increase in mean water level due to the presence of breaking waves. Similarly, wave setdown is a wave-induced decrease of the mean water level before the waves break (during the shoaling process).
How is wave set up related to water level?
Wave set-up. Wave set-up is a very important phenomenon in the surf-zone hydrodynamics. This is a local elevation in the mean water level on the foreshore, caused by the reduction in wave height through the surf-zone. The wave set-up is proportional to the wave height at breaking.
How is the wave setup of a Wave modeled?
Wave setup can be mathematically modeled by considering the variation in radiation stress (Longuet-Higgins & Stewart 1962). Radiation stress is the tensor of excess horizontal-momentum fluxes due to the presence of the waves. As a progressive wave approaches shore and the water depth decreases, the wave height increases due to wave shoaling.
What causes variation in the mean wave setup?
Besides a spatial variation in the (mean) wave setup, also a variation in time may be present – known as surf beat – causing infragravity wave radiation . Wave setup can be mathematically modeled by considering the variation in radiation stress ( Longuet-Higgins & Stewart 1962 ).