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Hydrologic Modelling of Connectivity Expert Panel Recommendations 2025–Scenario 5–Connectivity EWA–Bourke Flow Trigger

Created 11/02/2026

Updated 11/02/2026

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Replenishment releases are triggered by a continuous period of low flow at Bourke. Up to one smaller release each year, releases from dams in the NSW Border Rivers, Namoi and Gwydir valleys are triggered when restrictions at Bourke under the resumption of flow rule are triggered by flow less than 450 ML/d for 120 days. Releases are made to target a flow at Bourke of at least 500 ML/d for 14 days.

A connectivity environmental water allowance was not considered for the regulated Macquarie River as it empties into the Macquarie Marshes rather than the Barwon-Darling.

Note: See Analysis of the Connectivity Expert Panel Recommendations: Hydrologic modelling assessment.pdf (attached) for more details.

Note: If you would like to ask a question, make any suggestions, or tell us how you are using this dataset, please visit the NSW Water Hub which has an online forum you can join.

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Additional Info

Field Value
Title Hydrologic Modelling of Connectivity Expert Panel Recommendations 2025–Scenario 5–Connectivity EWA–Bourke Flow Trigger
Language English
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://data.gov.au/data/dataset/63864dea-c3b0-4134-a1a9-cc28001305e8
Remote Last Updated 02/02/2026
Contact Point
NSW Department of Climate Change, Energy, the Environment and Water
?datansw@customerservice.nsw.gov.au
Reference Period 01/01/1895 - 30/06/2023
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        141,
        -32
      ],
      [
        141,
        -28
      ],
      [
        154,
        -28
      ],
      [
        154,
        -32
      ],
      [
        141,
        -32
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal DataNSW

Data Source

This dataset was originally found on DataNSW "Hydrologic Modelling of Connectivity Expert Panel Recommendations 2025–Scenario 5–Connectivity EWA–Bourke Flow Trigger". Please visit the source to access the original metadata of the dataset:
https://data.nsw.gov.au/data/dataset/nsw-hydrologic-modelling-scenarios-scenario-5-connectivity-ewa-bourke-flow-trigger