Outlook for the 2020/21 season

Wednesday 1 July, 2020

The outlooks for 2020/21 seasonal determinations are based on historical flow records that have been adjusted to match climate conditions observed since 1975. The outlook scenarios presented are:

Wet: Inflow volumes to major storages that are greater in 10 years out of 100

Average: Inflow volumes to major storages that are greater in 50 years out of 100

Dry: Inflow volumes to major storages that are greater in 90 years out of 100

Extreme Dry: Inflow volumes to major storages that are greater in 99 years out of 100

The following tables summarise possible high-reliability water share seasonal determinations through the season and include a reference year to help users recognise the possible inflow conditions.

Murray System Outlook for Seasonal Determination of High-Reliability Water Shares

Inflow Conditions Similar inflow season 17 August 2020 15 October 2020 15 December 2020 17 February 2021
Wet 2016/17 40% 94%  100% 100%
Average 2005/06 24%  48%  83% 100%
Dry 2015/16  14%  35%  42% 48%
Extreme Dry 2006/07  9%  13%  16% 19%

 

Goulburn and Loddon System Outlook for Seasonal Determination of High-Reliability Water Shares

Inflow Conditions  Similar inflow season 17 August 2020  15 October 2020 15 December 2020 17 February 2021
Wet 2010/11 71%  100%  100% 100%
Average 2003/04 47% 85% 100% 100%
Dry 2008/09 38%  49% 61% 67%
Extreme Dry 2006/07 35% 35% 37% 39%

 

Campaspe System Outlook for Seasonal Determination of High-Reliability Water Shares

Inflow Conditions Similar inflow season 17 August 2020 15 October 2020 15 December 2020 17 February 2021
Wet  2010/11 100% 100% 100% 100%
Average 2003/04 61%  100% 100% 100%
Dry 2008/09 36% 45% 46% 46%
Extreme Dry 2006/07 32%  32% 32% 32%

  

Broken System Outlook for Seasonal Determination of High-Reliability Water Shares

Inflow Conditions Similar inflow season 17 August 2020 15 October 2020  15 December 2020 17 February 2021
Wet 2010/11 93%  100%  100% 100% 
Average 2005/06 74% 100% 100% 100% 
Dry 2009/10 26% 49%  61% 66%
Extreme Dry 2002/03 20% 21% 22% 24%

 

Bullarook System Outlook for Seasonal Determination of High-Reliability Water Shares

Inflow Conditions Similar inflow season 17 August 2020 15 October 2020 15 December 2020 17 February 2021
Wet 1996/97 100%  100%  100% 100% 
Average 1990/91 100% 100%  100% 100% 
Dry 2007/08 0% 26%  52% 57% 
Extreme Dry 2015/16 0% 0%  0% 0%

 

Additional outlook scenarios for each system are available from the Northern Victorian Resource Manager website (www.nvrm.net.au/outlooks).

Outlooks for low-reliability water shares (LRWS) will be prepared during the 2020/21 season if seasonal determination are 100% HRWS and there is the possibility of LRWS being allocated.

Upcoming Resource Manager announcements

  • The risk of spill in the Murray, Goulburn and Campaspe systems will be updated on Friday July 10, 2020.
  • The next 2020/21 seasonal determination announcement will be released on Wednesday July 15, 2020 and will include an updated outlook.