The latest assurance report from the Murray-Darling Basin Authority (MDBA) has revealed a significant shortfall in the delivery of essential projects related to the Sustainable Diversion Limit Adjustment Mechanism (SDLAM), ahead of the critical deadline of December 31, 2026. The report indicates that many projects are either unlikely to be completed on time or may not be delivered at all, jeopardizing the Basin Plan’s objectives.
Andrew McConville, Chief Executive of the MDBA, highlighted that while some smaller initiatives have shown promising environmental outcomes, such as those at the Chowilla floodplain in South Australia, Hattah Lakes in Victoria, and Gayini Nimmie-Caira in New South Wales, the overall progress is insufficient. “We can clearly see that many of the significant projects will not be delivered, and we can expect a shortfall compared to the 605 gigalitres a year determined in 2017,” Mr. McConville stated.
The assurance report presents a revised supply estimate for the SDLAM, indicating a potential shortfall ranging from 255 gigalitres to 355 gigalitres. This significant difference underscores the challenges faced by state governments in implementing necessary projects. The evidence informing this report was gathered from the New South Wales, Victorian, and South Australian governments, which are tasked with project delivery.
Determining the final SDLAM supply contribution will depend on the completion of the planned projects by these state authorities. Continued collaboration will be crucial to achieve the intended environmental and water management outcomes. The MDBA has acknowledged the ongoing cooperation of state governments in implementing the Basin Plan and their contributions to this assurance report.
Looking ahead to 2026, the MDBA plans to reconcile and finalize the supply contribution based on the completed measures. A draft determination of the proposed Sustainable Diversion Limit (SDL) adjustment will be released, allowing the public to submit their feedback in late 2026. The final reconciliation determination is due to be submitted to the Australian Government Minister for Water for consideration and decision by the end of December 2026.
For further details on the reconciliation process and the Sustainable Diversion Limit Adjustment Mechanism, interested parties can visit the MDBA’s official website. The latest Annual Assurance Report is also available for public access, providing comprehensive insights into the ongoing efforts and challenges faced in managing the Murray-Darling Basin’s water resources.
