Pearce, A. and Cope, S and Last, E. and Harris, E. and Polidoro, A. and Pullen, T.A. (2023) Storms, bi-modal seas and our changing understanding of shingle beach response at Eastoke, Hayling Island, UK. In: ICE Breakwaters 2023, 25-27 April 2023, Portsmouth, UK.
Full text not available from this repository.Abstract
Beach management through nourishment and annual recycling has been applied for over 37 years to manage flood and coastal erosion risk to 1700 properties at Eastoke, Hayling Island, UK. This form of natural flood risk management has proved successful, in avoiding the annual flooding that blighted this area previously. However there have been unexpected storm events which have caused beach erosion and localised flooding. Using long term real-time nearshore wave datasets and state of the art statistical methods, extreme wave conditions for both unimodal and bi-modal wave events were generated, which have illustrated some concerning patterns. These extreme events have been applied in Shingle-B, a new parametric model, which has indicated a more extreme beach response to bi-modal sea states compared uni-modal (which the beach was originally design for). The model was then applied to sensitivity test alternative beach profile designs. This has important consequences for frontages like Eastoke, which depend on maintaining a healthy beach crest to avoid erosion and flooding. The Shingle-B results suggest that a beach designed for uni-model conditions may not provide the expected standard of protection for certain bi-modal wave conditions in terms of crest cut back.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Coasts > General |
| Divisions: | Coastal |
| Depositing User: | Helen Stevenson |
| Date Deposited: | 12 Dec 2023 15:24 |
| Last Modified: | 12 Dec 2023 15:24 |
| URI: | http://eprints.hrwallingford.com/id/eprint/1588 |
Actions (for site administrators only - login required)
 |
View Item |
