Increase in Murray, Broken and Campaspe Seasonal Determinations

Announcement Date: 3 Sep 2012
Next Announcement Due: 17 Sep 2012

Determination Data

Seasonal determinations for northern Victoria regulated river systems.

  High Reliability Water Share Change to High Reliability Water Share Low Reliability Water Share Comments
Murray 61% +9% 0% Not declared
Broken 44% +8% 0% -
Goulburn 100% 0% 0% Not declared
Campaspe 100% 0% 54% Not declared
Loddon 100% 0% 0% -
Bullarook Creek 100% 0% 100% -

Further Information

The Resource Manager for northern Victorian regulated water systems today announced an update to the seasonal determinations for the 2012/13 season.

The Murray system seasonal determination is 61% of high-reliability water shares (HRWS), an increase of 9%. The Broken system seasonal determination has increased by 8% to be 44% HRWS. Campaspe system customers have a seasonal determination of 100% HRWS and a seasonal determination of 54% of low-reliability water shares (LRWS), an increase of 29% LRWS.

The seasonal determination in the Goulburn and Loddon systems remains unchanged at 100% HRWS. The Bullarook system seasonal determination also remains unchanged at 100% HRWS and 100% LRWS.

“Recent rainfall has resulted in good inflows to the storages, particularly in the Loddon and Campaspe catchments. The increase in the Campaspe system seasonal determinations is a direct result of these inflows,” said Dr Mark Bailey, Resource Manager. “Unregulated flows downstream of the Murray storages are being used to fill distribution systems and meet irrigation demand. The use of these unregulated flows has increased the volume of water available in storage to make seasonal determinations in the Murray system.”

Approximately 42,000 ML has been pre-released from Lake Eildon and about 16,000 ML has spilled from Goulburn-Murray Water’s share of Lake Eppalock in the past fortnight. The pre-releases from Lake Eildon are treated as a spill from storage. The volumes in spillable water accounts in the Goulburn and Campaspe systems have been reduced as a result.

“No spills have occurred from Lake Dartmouth in the Murray system. The level at Lake Dartmouth is still rising and the storage is holding more than 93% of capacity, which indicates a high risk of spill exists. Any pre-release or physical spill from Lake Dartmouth will reduce spillable water account volumes, allowing all storage inflows to contribute to increased seasonal determinations.”

Upcoming Resource Manager Announcements

The next assessment of the probability of spill in the Murray, Goulburn and Campaspe systems will be issued on Monday 10 September 2012.

The next seasonal determination announcement and update outlook for 2012/13 will be issued on Monday 17 September 2012.