Using a two-step framework for the investigation of storm impacted beach/dune erosion

Long-term coastal management of beach/dune systems requires the definition and assessment storm events. This study presents a framework using statistical analyses numerical modelling (XBeach) to characterize events investigate their impact on erosion. The method is developed exemplary data from Formby Point Sefton coast (UK), which has complex beach morphology frontal dunes. Relevant are classified by versatile univariate response function taking into account both nearshore water levels offshore significant wave heights ( Hs ). It shown that compared established classification ≥ 2.5 m) 35% more relevant for erosion identified. Also exceed critical conditions longer durations, cause greater (12%) along profile. proposed thus captures can inform strategies. widely applicable other systems. • A two-step was developed: identify occurrence based coast. Established cannot all in extreme 2013/14 winter. Proposed tidal anomaly identified additional (35%) than established. showed increased per year representing global change