Updated flood overlay maps

City of Gold Coast recently revised its flood overlay maps, which were today endorsed by Council to commence as part of City Plan Version 6 on 20 September 2018.

The maps are an update to the existing flood overlay maps and were developed utilising the latest topographic, land use, technological and hydrological data; as well as the latest State Government and Council policies. As a result, Council can provide the community with more informed flood information to help build the city’s resilience.

The updated mapping considers future changes to climate and incorporates the projected increase in sea level of 0.8m above present-day levels by 2100, established by the State Government in 2015. The updated mapping also includes the State Government's projected 10% storm tide intensity and 10% rainfall intensity, based on advice from industry representatives and recommended by the Australian Rainfall and Runoff Handbook.

These maps reflect a flood event that has a 1% chance of occurring in any one year, also referred to as a one-in-100-year ARI (Average Recurrence Interval) flood event, and identify properties that may be affected by this designated flood event. They act as a trigger for the development of land identified in the flood overlay map.

For more information visit www.goldcoast.qld.gov.au