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Residential flood losses in Perth, Western Australia

Created 16/10/2025

Updated 16/10/2025

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The Swan River is the main river through Perth, the capital city of Western Australia. Direct tangible economic losses to residential dwellings in Perth was based on hydraulic modelling using the one dimensional unsteady flow model HEC-RAS, geographical information systems, a building exposure database and synthetic stage-damage curves. Eight flood scenarios ranging from the 10 year average recurrence interval (ARI) to the 2000 year ARI event were examined. The combined structure and contents flood losses ranged from A$17 million to A$659 million for insured structures and A$14 million to A$583 million for uninsured structures. This equates to an average annual damage of A$9.6 million and A$7.9 million respectively. The results reinforce the need to consider a wide range of varying magnitude flood events when assessing losses due to the temporal and spatial variation between flood scenarios.

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Additional Info

Field Value
Title Residential flood losses in Perth, Western Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/75c4de56-9d33-4f72-8d14-af49dddbc273
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        115.5,
        -32.0
      ],
      [
        117.0,
        -32.0
      ],
      [
        117.0,
        -31.0
      ],
      [
        115.5,
        -31.0
      ],
      [
        115.5,
        -32.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Residential flood losses in Perth, Western Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/residential-flood-losses-in-perth-western-australia