Australian Flood Maps

Australian Flood Maps

Our Australia Flood Map was first created in 2014 as part of JBA’s Global Flood Map (GFM®) and provides undefended flood hazard maps for six return periods (20, 50, 100, 200, 500 and 1,500-year). The flood map has since been subject to updates in 2015/2016 (DEM), 2018/19 (hydrology) and 2020/21 (5m mapping). The latest updates focused on new 5m resolution flood mapping for Far North QLD, South East QLD, Northern NSW, Greater Sydney, Greater  Melbourne, Greater Adelaide, Greater Perth and Northern Tasmania.

Latest DEM

A digital elevation model (DEM) provides a digital representation of the true ground level of the earth and is the basis of all hydraulic flood modelling. For all high-resolution areas we use Geoscience Australia 5m DEM.  For other areas we use Intermap’s NEXTMap WORLD30 DSM and a variety of bareearth DTM datasets.

Use in Australia

The use of broad-scale flood modelling may support a range of purposes in Australia, including strategic management for the transport and utilities sector, governments, and re/insurance.  This could include:

  • Use in large-scale strategic upgrades of transport or utilities networks.  

  • Identifying where flooding occurs

  • Providing quantitative data for analysis

  • Providing information on the road closure, for instance a statistical

  • Analysis of the expected number of days impacted at waterway crossings, e.g. time/delay/inundation per year.


Getting access

Our Australian Flood Maps are platform agnostic and are available to everyone through a range of sources:

  • In-house directly from JBP

  • Via our wide range of resellers.

  • As part of a consultancy service to help identify exposure hotspots, run per-risk flood assessments and manage accumulations.

Flood data can be provided for any scale - property level, postcode, Council area, State or National.  

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