COASTAL OVERWASH – THE IMPACTS OF A 100-YEAR STORM FLOOD EVENT IN SOUTH-EASTERN DENMARK

Coastal overwash where water and sediment flow over the beach crest can be highly damaging to human properties and infrastructure. This involves a need for accurate overwash prediction for planners and engineers. On the other hand, on undisturbed coastlines, overwash makes an important sediment contribution to the system. Contributions which are key for spits and barrier islands to keep up with predicted future sea level rises. Based on a recent 100-year storm event in the eastern Baltic Sea in 2023, we asses both the predictive capability of a storm impact model (Sallenger, 2000), and the cross-shore sediment exchange associated with washover fans.