Increased sea levels


Climate change is expected to lead to increases in sea level, with projections of a sea level rise of up to 1.1 metres by 2100. (This is the 'high' scenario. The 'low' scenario is for a rise of 0.5 metres, and the 'medium' scenario is for a rise of 0.8 metres.) Such a sea level rise, with an allowance included for a modelled high-tide event, could potentially expose 157 000–247 600 existing residential buildings to inundation; the 2008 replacement value of these buildings is estimated at $41–63 billion.37


Aerial view of St Huberts Island canal estate, connected to the Tasman Sea via Broken Bay, Central Coast, New South Wales

Harper P (2011). Built environment: Increased sea levels. In: Australia state of the environment 2011, Australian Government Department of the Environment and Energy, Canberra,, DOI 10.4226/94/58b65a5037ed8