River Murray Inundation Mapping
The amount of water that flows down the River Murray in South Australia can vary greatly in volume. This variation is important for the health of the river, and high flows and flooding events are crucial for maintaining the ecological health of River Murray floodplains.
It is important to understand the difference between high flows and flood events. The classifications for South Australian River Murray flows are:
|Flow at Border||SA River Murray||Shack Areas Only Downstream of Cadell (Excluding River Murray Towns)|
|200,001 ML/day or more||Major Flood|
|130,001 to 200,000 ML/day||Moderate Flood|
|100,001 to 130,000 ML/day||Minor Flood|
|60,001 to 100,000 ML/day||High Flow||Minor Flood|
|40,001 to 60,000 ML/day||High Flow|
|40,000 ML/day or below||Normal Flow Range, no warnings|
During high flows or flooding events, DEW will issue High Flow Advice or Flood Advice which contain information about safety precautions that should be adhered to during these events.
Flooding events are rare.
A South Australian River Murray flood is considered 'exceptional' if the water level is five or more metres above pool level. Historically this has occurred just four times, in 1931, 1956, 1973 and 1974. The 1956 flood, which peaked at 341,000ML/day, is the largest River Murray flood on record.
60,000 ML/day, 80,000 ML/day and 90,000 ML/day inundation maps
To help assess the possible extent of inundation for different flow scenarios, the Department for Environment and Water has modelled and mapped River Murray flow events of 60,000ML/day, 80,000 ML/day and 90,000ML/day.
The inundation extents shown on the maps are predictive only and should be interpreted in accordance with the disclaimers stated before launching the maps and noted on the maps.
Maps of predicted inundation for a flow of 60,000 ML/day
Maps of predicted inundation for a flow of 90,000 ML/day
For the latest information regarding River Murray flows, River Murray Flow Reports and public safety advice visit
River Murray Flow Reports.
For current river levels and other information, see
If you are concerned about inundation and safety during high River Murray flows, contact the State Emergency Service, or refer to advice on