Flows in the River Murray system for September 2024

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: 21 October 2024

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 September 2024 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 September 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
River Murray Yes
  • Deliver elevated baseflows to maintain habitat and connectivity for native fish from Hume to South Australia (including Edward/Kolety-Wakool) 
Barmah Forest  N/A
  • Increase the frog population.
  • Increase habitat for native fish and increase their population.
  • Increase the turtle population.
  • Enhance the health of river red gum communities and aquatic vegetation in the wetlands and watercourses.
  • Increase the extent and improve the condition of floodplain marsh vegetation communities, particularly Moira grass. 
Lower Broken Creek  N/A
  • Maintain oxygen levels suitable for aquatic animals.
  • Reduce stagnation in weir pools.
  • Provide habitat for platypus, fish and turtles. 
Gunbower Creek  N/A
  • Maintain habitat and food resources for native fish and support breeding and larval survival. 
Gunbower Forest  Yes
  • Promote the growth of river red gums and understorey vegetation on the floodplain.
  • Provide diverse feeding and breeding habitat for waterbirds, small-bodied native fish, frogs and turtles in wetlands and the surrounding floodplain. 
Edward/Kolety-Wakool River system  Yes
  • Spring pulse and elevated baseflows in the Edward, Colligen-Niemur, Yallakool and Wakool rivers to maintain habitat and connectivity for native fish.  
Goulburn River N/A
  • Spring fresh and elevated baseflows to provide increased connectivity, food resources and habitat for native fish
  • Increase the soil moisture in banks to improve the condition of existing native vegetation.  
Campaspe River N/A
  • Protect and increase populations of native fish and platypus.
  • Maintain riparian and instream vegetation.
  • Increase diversity and biomass of waterbugs.
  • Maintain water quality in deep pools. 
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. 
Hattah Lakes  Yes
  • Inundate a variety of types of wetlands at different elevations across the Hattah Lakes to increase habitat diversity.
  • Stimulate the growth and improve the condition of river red gums that fringe wetlands.
  • Provide feeding habitat for waterbirds.
  • Stimulate new growth of aquatic vegetation.
  • Inundate dry areas of wetlands to release carbon and nutrients to increase food web productivity.
  • Provide spawning and recruitment habitat for small-bodied native fish and maintain sufficient water depth to provide open-water habitat for large-bodied native fish (such as golden perch). 
Murrumbidgee  Yes
  • Elevated spring flows for improved connectivity along the length of the Murrumbidgee.
Lower Darling-Baaka River  No
  • Elevated baseflows to maintain habitat and connectivity for native fish along the length of the Lower Baaka-Darling. 
Chowilla Floodplain  Yes
  • Provide healthy wetland refuge habitat for a range of native plants and animals. 
Pike-Katarapko Floodplain  Yes
  • Operate environmental regulators to inundate floodplain areas to support the health and resilience of native vegetation, wetlands and anabranch habitats. 
Lower Lakes, Coorong and Murray Mouth  Yes
  • Increase 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 Coorong to support native fish, plants, invertebrates and waterbirds.