Darwin Region Storm Surge mapping

The modelled inundation extent shows the total storm surge (technical terminology is storm tide) hazard risk due to tropical cyclones in terms of the ocean water level comprising the combined effects of astronomical tide plus storm surge plus wave setup for two statistical Average Recurrence Intervals (ARI). The Primary Storm Surge (PSS) Zone refers to the extent of inundation for a storm tide event of 100 year ARI. The Secondary Storm Surge (SSS) Zone refers to the further extent of inundation for a storm tide event of 1000 year ARI. The extent of PSS is used for land use planning. The extent of SSS is an additional information for risk analysis. The extent do not include the possible effects of very localised wave runup.