5.1 Surface water allocation remaining

Supporting information

The surface water allocation remaining corresponds to the unused volume of allocated surface water that is carried forward to the following year, called a 'rollover allocation'. In the Barossa Prescribed Water Resources Area (PWRA), licensees for the North Para River and tributaries may carry over the unused portion of their allocation up to a maximum of 30% of the annual allocation, whereas for Little Para Prescribed Water Course (PWC) licensees carry-over is not permitted (Adelaide and Mount Lofty Ranges Natural Resources Management Board 2013).

At 30 June 2013, the volume of water carried over for surface water licences in the Barossa PWRA was 574 ML.

The surface water allocation remaining at 30 June 2013 was calculated as shown in the following table.

Surface water allocation remaining at the start and end of the 2012–13 year
Account Volume (ML)
Opening balance (at 1 July 2012)
21.1 Surface water allocation announcements 3,417
13.1 Adjustment and forfeiture of surface water allocation (2,210)
17.11 Entitled diversion of allocated surface water to users (1,010)
Closing balance (at 30 June 2013)

Diversions from surface water resources located outside of the Barossa PWRA and Little Para PWC were were are managed by authorisations under sections 128,132 and 164N of South Australia's Natural Resources Management Act 2004 during the 2012–13 year. In these instances, carry-over arrangements do not exist.

Quantification approach

Data source

Water Information and Licence Management Administration (WILMA) database.

Provided by

South Australian Department of Environment, Water and Natural Resources.


Carry-over of surface water allocations (rollover allocations) for the Barossa PWRA was extracted from the WILMA licensing database.

Assumptions, limitations, caveats and approximations


Uncertainty information

The uncertainty estimate was not quantified.