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The Murray–Darling Basin Authority (MDBA) operates the River Murray to share water between New South Wales, Victoria and South Australia, as required under the Murray–Darling Basin Agreement. To undertake this work the MDBA has built, maintained and operated a hydrological model of the River Murray.

The Lower Darling was subject to tragic fish death events in December 2018 and January 2019. The large fish death events covered a 40 kilometre stretch of the Darling River, downstream of Menindee Lakes.

In late March 2019, rain fell in the Namoi, Macquarie and Warrego catchments which led to the first significant flow to occur along those systems, for an extended period of time.

The Menindee Lakes are located in south-west New South Wales on the Darling River, about 200 km upstream of the Darling River's junction with the River Murray.

The lower Darling catchment is located on the semi-arid plains of south-western New South Wales.

The Warrego River is located in the top north-west of the Murray–Darling Basin, directly east of the Paroo River catchment.

The amount of water released into the Lower Darling River from the Menindee Lakes has been reduced to 500 megalitres per day, marking the end of the water order made by the Murray–Darling Basin Authority on behalf of Basin state governments.

The Murray–Darling Basin Authority anticipates that the water volume in the Menindee Lakes could surpass 640 gigalitres late this week, triggering water sharing arrangements agreed between New South Wales, Victoria and South Australia.

The Lower Darling was subject to tragic fish death events in December 2018 and January 2019. The large fish death events covered a 40 kilometre stretch of the Darling River, downstream of Menindee Lakes. 

As the close of autumn brings a striking turnaround in climate conditions, the Murray–Darling Basin Authority welcomes signs of a boost in confidence across the Basin thanks to recent rain and an improved forecast for water availability.