Effects of storm clustering on beach/dune evolution

摘要: Abstract Impacts of storm clustering on beach/dune morphodynamics were investigated by applying the state-of-the-art numerical model XBeach to Formby Point (Sefton coast, UK). The adopted cluster was established analysing observed winter storms from December 2013 January 2014 using a threshold wave height. first that occurred during this period is regarded as exceptionally intense, and occurrence such events very unusual. A 1D setup for highly dynamic cross-shore at Point. After initial calibration parameters against available post-storm profile data, used simulation cluster. It assumed no beach recovery between adjacent due short time intervals storms. As result, final predicted previous pre-storm subsequent storm. evolution each influenced in Due effect, bed level change not proportional power within cluster, it would be an individual case. Initially, large interact with multi-bared foreshore enabling weaker influence upper lower dune system. This results greater toe also less severe shown usual water define erosion over about 1 m extreme conditions. provides useful insights into morphodynamic processes systems (using example), which quantifying effects develop tools coastal management.