Mean sea levels have risen by 12 cm around Australia over the last 50 years, with sea-level rise accelerating in recent decades. This has led to 77% of all current monthly mean sea level records being set since 2010. This has led to more frequent floods, exacerbated in some locations by simultaneous increases in tidal ranges. Record flood levels have been set 2.4 times more frequently since 2010 than would be expected without sea level rise and variability.
This presentation explores how sea-level rise, tidal ranges and associated flood hazards have changed through space and time, and how they are anticipated to continue changing with projected future sea-level rise. The emergence of chronic and tidal flood regimes is a key threat to coastal assets and ecosystems. We explore this threat using recently developed coastal flood projection datasets that researchers and practitioners can use to quantify local-scale coastal hazard changes in a nationally consistent framework.