5.1 Surface water allocation remaining

Supporting information

Carry-over of unused water allocated for high-reliability and low-reliability water shares in the Werribee and Bacchus Marsh irrigation districts is not permitted. The volume reported in the water accounting statements is zero.

According to Southern Rural Water's Werribee and Bacchus Marsh allocation method, any unused allocation at the end of the season (30 June) will be part of the resource available for opening allocation at the start of the following season (1 July).

The surface water allocation remaining was calculated as shown in the following table.

Calculation of surface water allocation remaining
Account Volume (ML)
Opening balance at 1 July 2012 0
21.1 Surface water allocation announcements                        18,302
17.11 Entitled diversion of allocated surface water to users                         (11,073)
13.1 Adjustment and forfeiture of surface water allocation             (7,229)
Closing balance at 30 June 2013 0

Quantification approach

Data source

Werribee and Bacchus Marsh system allocation model.

Provided by

Southern Rural Water.


Surface water allocation remaining was calculated according to the Werribee and Bacchus Marsh allocation method.

Details of the allocation model are available on the Southern Rural Water website.

Assumptions, limitations, caveats and approximations


Uncertainty information

The uncertainty estimate was not quantified.