Probabilistic Coastal Inundation

Map layers showing the extent of potential future coastal inundation have been developed for the coastline of Australia. These can be used for hazard assessment, in conjunction with information about local inundation effects and historic inundation events. An example application of the hazard layers using the Australian Exposure Information Platform (AEIP) to generated exposure reports is also provided for 2100. \nLineage: The coast of Australia was broken up into 4029 tiles, each tile is ~5km wide and extends ~5km inland. Tiles overlapping each LGA in the 2023 LGA shapefile (Australian Bureau of Statistics) were analysed separately. The three main sources of data to compute inundation extents were gridded land elevations, tide gauge water levels and ocean modelled waves. The availability of these datasets across the nation determined the coverage of the inundation modelling, which includes all major cities and many regional cities, within ~160 LGAs. Further coverage could be provided in the future with the inclusion of hydrodynamic water level simulations where there is no tide gauge, future government funded LiDAR DEM surveys, and increasingly accurate satellite remote sensing mission data.