THE TIDE IS HIGH: NEW INSIGHTS ON COASTAL FLOODING TRENDS AND FUTURES

Abstract

Coastal flood frequencies are expected to increase around the world due to sea-level rise (SLR). This is largely related to the emergence of tidal flooding, where coastal flood thresholds are exceeded by astronomical tides alone. We will discuss the concept of tidal flooding and the observed trends from Australia and the United States. We then apply a new risk assessment framework (Hague et al. 2022) to identify which locations are most vulnerable to chronic flooding due to SLR this century. Finally, we discuss the implications of a global application of this framework for coastal engineering and management applications.