Hydrologic Modelling of Connectivity Expert Panel Recommendations 2025–Scenario 1–End of System–High Security Accounts

Brief description

Set an end of system flow target (equivalent to the bottom of baseflow) in regulated valleys (Gwydir, Namoi and Border Rivers) to protect baseflows to enable baseflow targets in the Barwon-Darling to be achieved in non-dry times. The end of system flow achieved through limitations on supplementary and floodplain harvesting access in the first instance, with releases made from storage if these flows are not adequate. End of system target is always met during non-dry times. Dam releases made from a new high security account. Releases not made in periods where the rolling 30-day average dam inflows fall below the 75th percentile (the dry inflow trigger).

The Panel has not included a recommendation for an end of system flow rule for the regulated Macquarie-Cudgegong as the end of the system flows discharge into the Macquarie Marshes.


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

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