Gravel Barrier Beach Morphodynamic Response to Extreme Conditions

Gravel beaches and barriers form a valuable natural protection for many shorelines. The paper presents numerical modelling study of gravel barrier beach response to storm wave conditions. XBeach non-hydrostatic model was set up in 1D mode investigate volume change overwash under wide range unimodal bimodal conditions cross sections. validated against at Hurst Castle Spit, UK. is used simulate the sections selection statistically significant water level scenarios thus simulating an ensemble overwash. This results develop simple parametric estimating during given condition Numerical simulations conditions, which are common occurrence parts UK were also investigated. It found that from storms will be higher than if swell percentage spectrum greater 40%. demonstrated as providing useful tool change, commonly measure management.