River Murray Flow Report and Water Resources Update

Date posted: 19 May 2017

Report #20/2017

Issued 10:00 am 19 May 2017

This supersedes the previous flow report issued by the Department of Environment, Water and Natural Resources (DEWNR) on 12 May 2017. The next report will be provided on Friday 26 May 2017.

In this report, for ease of representation, large volumes of water are expressed in gigalitres (GL), while smaller volumes are expressed in megalitres (ML). One GL is equal to 1 000 ML.


The flow at the South Australian border is approximately 7 GL/day and will decrease to around 6 GL/day during the coming week. It comprises:

  • normal May Entitlement Flow 3 GL/day;
  • plus Lake Victoria spill (portion of South Australia’s Storage Right)
  • plus environmental water; and
  • interstate trade adjustments.

The current increased flow to South Australia is a result of an interstate rainfall event in late April, which reduced irrigation demands and River Murray System losses. This event was upstream of Lake Victoria and caused Lake Victoria to spill.

The flow over Lock 1 is approximately 10 GL/day and will decrease to around 7 GL/day during the coming week, depending on weather conditions and extractions.

It is important to note that flow forecasts in this advice are based on the information available at the time of preparation. Advice may change as new gauging information becomes available, or due to rainfall events or changed operations upstream. The forecasts will be revised as new information becomes available.

Download the full report.