PARAMETRIZING DUNE RESILIENCE FROM COLLISION THROUGH INUNDATION

Abstract

Numerous studies have identified the protective benefit provided by dunes in shielding upland assets. However, dunes are susceptible to erosion. Breaches, overwash or significant overtopping of a dune are all associated with greater damages to upland infrastructure. Therefore, reliable tools are needed to efficiently assess the likelihood and magnitude of dune erosion during storm events. Existing methods rely on numerical modeling (extensive investment) or insufficiently parameterize the system. To fill this gap, a fragility model using a newly developed dune Engineering Demand Parameter (EDP) was introduced (Janssen and Miller 2022).