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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Extreme events, natural variability and climate change : Effect of storm clustering on beach/dune erosion
Effect of storm clustering on beach/dune erosion
Author : PUSHPA DISSANAYAKE(1) & HARSHINIE KARUNARATHNA(2)
ABSTRACT
Storm clustering effects on beach/dune morphodynamics were investigated by applying the state-of-the-art numerical
model XBeach to the Sefton coast, northwest England. The adopted storm cluster consisting of seven storms was
established by analysing the observed winter storms from December 2013 to January 2014. No individual storm
occurred during this period is regarded as exceptionally intense, whereas the occurrence of such a cluster of seven
events is very unusual. 1D models were setup at a number of highly dynamic cross-shore locations. After initial
calibration of the model parameters against available post-storm profile data, the models were used to reproduce
beach/dune evolution due to the storm clustering effects. The final predicted post-storm profile of the previous storm was
used as the initial profile configuration of the subsequent storm. The predicted evolution during each storm was
influenced by the preceding storms in the cluster. Due to the clustering effect, the erosion volume was not proportional to
the storm power of the cluster, as expected an individual storm case. The clustering effect on morphology dominates at
Formby Point and north therein while decreasing to south. The predicted profile evolution is useful to interpret the
morphodynamic processes of beach/dune systems during a storm cluster to develop sustainable coastal management
tools.
File Size : 590,687 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Extreme events, natural variability and climate change
Date Published : 20/08/2015
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