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2024 Hawkesbury-Nepean River Flood Study

Created 24/06/2025

Updated 19/10/2025

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The Hawkesbury-Nepean River Flood Study (May 2024) provides high-resolution spatial and temporal data identifying areas in the Hawkesbury-Nepean Valley affected by flooding, including backwater inundation of tributaries, and assesses the potential impacts of climate change on flood behaviour. The study covers the 21,400km² catchment and the 190km river length from Bents Basin near Wallacia to Brooklyn, encompassing Local Government Areas such as Penrith, Hawkesbury, Blacktown, The Hills, Wollondilly, Liverpool, Hornsby, and Central Coast. This dataset includes outputs from state-of-the-art hydrologic and hydraulic modelling, offering detailed flood information on peak levels, depths, velocities, extents, and hazard classifications for events ranging from frequent floods to the probable maximum flood (PMF).

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Additional Info

Field Value
Title 2024 Hawkesbury-Nepean River Flood Study
Language English
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://data.gov.au/data/dataset/74124494-1af1-47cf-ae25-93d08215b12f
Remote Last Updated 08/10/2025
Contact Point
NSW Reconstruction Authority
?datansw@customerservice.nsw.gov.au
Reference Period 23/06/2025
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        150.60667,
        -33.92944
      ],
      [
        150.60667,
        -33.32861
      ],
      [
        151.30472,
        -33.32861
      ],
      [
        151.30472,
        -33.92944
      ],
      [
        150.60667,
        -33.92944
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal DataNSW

Data Source

This dataset was originally found on DataNSW "2024 Hawkesbury-Nepean River Flood Study". Please visit the source to access the original metadata of the dataset:
https://data.nsw.gov.au/data/dataset/nsw-2024-hawkesbury-nepean-river-flood-study