APPLYING XBEACH ON 7,300 KM COAST: COASTAL CLIFF RETREAT DURING A STORM

MOTIVATION Denmark is surrounded by more than 7,300 km soft coastline considered at high risk of storm erosion. The presence of more than 13,000 groins, shore parallel breakwaters and revetments clarify the need of protecting infrastructure and property against coastal erosion in a changing climate. The Danish Coastal Authority is responsible for carrying out a national risk assessment evaluating the risk level of storm erosion today, and in 2070 and 2120. This abstract focusses on the methodology for the calibration and validation of the numerical model Xbeach for calculating cliff retreat during storms using measured storm data. It is of highest priority to set up a model, which can perform on a national scale. In this work, it is shown that a single model setup is able to estimate the cliff retreat for all types of Danish coasts in both a 1D and 2D model approach.