Flows in the River Murray system for April 2025

Flows in the River Murray system vary widely depending on a range of factors, including rainfall, inflows, evaporation, and demands for water from all users.

Published: 16 May 2025

At any given time, water flowing through the river is destined for various uses, including irrigation, industry, communities, the environment, and meeting South Australia’s flow entitlement.

The exact mix of these flow components is determined by a number of factors including demand and water availability. 

Each month we provide an update showing flows in the River Murray system including the total volume of water flowing for consumptive use and to care for the environment. The update also outlines the intended environmental outcomes.

Information in the figure above is for the month of April 2025 and may not include recent rainfall or delivery of water for the environment in the River Murray system. Information in this figure is an average estimate over the past month and formal accounts from Basin state governments may vary. Water for the environment in the figure above represents water that is held by environmental water holders, through entitlements. Other water that flows through the river can also achieve environmental outcomes.

River flow information

The April flow to South Australia included water for South Australia’s entitlement, traded volumes and water for the environment. Water for the environment at the South Australian border throughout winter-spring comes primarily from return flows from upstream environmental water use.  

For the latest information on water for the environment see the River Murray weekly report.

Intended environmental outcomes

Water for the environment takes time to move through the system. Water from past watering events is still moving through the River Murray as return flows. Environmental water holders can also use water for the environment by extracting allocations directly from the river. These allocations are often used for small-scale watering events rather than having water delivered from a storage. 

Location Return flows used at site Intended environmental outcomes
Lower Broken Creek  N/A
  • Provide native fish passage through fish ladders.
  • Reduce stagnation in weir pools.
  • Provide habitat for platypus, fish and turtles. 
Goulburn River N/A
  • Cue the movement of native fish.
  • Increase soil moisture on banks to maintain native vegetation.
  • Improve habitat for waterbugs. 
Gunbower Forest No
  • Promote wetland vegetation growth and habitat for waterbirds.  
Gunbower Creek No (not during April) 
  • Maintain habitat and food resources for native fish and support breeding and larval survival.
Loddon River N/A
  • Increase small and large bodied fish populations.
  • Maintain the condition of streamside and instream vegetation.
  • Maintain water quality to support aquatic animals.
Edward/Kolety–Wakool River system Yes
  • Maintain and improve large-bodied native fish populations (such as Murray cod).
Murrumbidgee River  N/A
  • Autumn pulse to support native fish populations and provide return flows downstream.
  • Yanco Creek deliveries for river connectivity, native fish outcomes and return flows into the Edward River. 
Great Darling Anabranch N/A
  • Maintain native fish populations, with particular focus on the dispersal of golden perch from Lake Cawndilla to the Murray.
Lower Lakes, Coorong and Murray Mouth  Yes
  • Raise water levels in the Lower Lakes to support aquatic vegetation growth and diversity.
  • Provide barrage fishway flows to support movement of native fish.
  • Salt export via the Murray Mouth.
  • Improve water quality in the northern Coorong to support native fish, plants, invertebrates and waterbirds.