Hawkesbury Nepean River Map

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No Flood 2AEP 10AEP 20AEP 50AEP 100AEP 500AEP 1000AEP PMF

The bounds of the river are shown as they are in normal conditions.

The Hawkesbury Nepean Catchment

About this map

Map type

Vector

Satellite

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This KML/KMZ file is an aggregation of publicly available geospatial information from a variety of sources, including:

Major watercourses:
https://data.gov.au/dataset/surface-hydrology-polygons-national
Minor Tributaries:
http://www.bom.gov.au/water/geofabric/
Flood overlays:
Land and Property Management Authority
Hawkesbury City Council, 2011.
NSW Reconstruction Authority (2024)
https://data.nsw.gov.au/data/dataset/2024-hawkesbury-nepean-river-flood-study
Local Government Boundaries:
https://data.gov.au/dataset/nsw-local-government-areas

This selection, processing, transformation, visualisation and software implementation is original work by Nathan Zamprogno, licensed under Creative Commons Attribution 4.0 (CC-BY 4.0). Free use is encouraged, with attribution.

This project was created in 2018 as a Google Earth overlay and updated in early 2026 incorporating new data such as the 2024 Hawkesbury-Nepean River Flood Study.
It is hoped to also soon include flood modelling from the Environmental Impact Statement for the shelved Warragamba Dam Raising project (State Significant Infrastructure ID: SSI-8441).

Further analysis and updates will be available at
https://councillorzamprogno.info/a-map-of-the-hawkesbury-nepean-river-and-its-tributaries-and-catchment-boundary/

This data is not recommended for the assessment of flood risk.
Any errors (such as in conversion from other GIS formats or my hand-tracing of the extent of creeks) are mine.