PREDICTING THE RESPONSE OF SHINGLE BARRIER BEACHES UNDER EXTREME WAVE AND WATER LEVEL CONDITIONS IN SOUTHERN ENGLAND

摘要

The morphodynamic response of shingle barrier beaches is examined, in response to a range of hydrodynamic conditions, in context with the pre-storm barrier geometry, and at a temporal scale based on typical storm events. Key variables affecting the crest evolution of shingle barriers to storm activity are identified and quantified. The barrier inertia parameter, an empirical dimensionless predictive overwashing threshold framework, has been tested in the field and the limits of applicability identified. The model has been applied in predictive mode to assess the risk of breaching at several sites in southern England.