Adelaide
13.1 Adjustment and forfeiture of surface water allocation

Supporting information

The volume reported (1,919 ML) is the volume of unused allocated water that was not permitted to be carried over at 30 June 2012 and was therefore forfeited.  

During the 2011–12 year, surface water (watercourse) allocation occurred in two areas of the Adelaide region that had water licences on issue:

  • North Para River and tributaries, included in the Barossa Prescribed Water Resources Area (PWRA)
  • Little Para River Prescribed Watercourse (PWC).

During the 2011–12 year, carryover was permitted in the Barossa PWRA but not on the Little Para River PWC (see line item 5.1 Surface water allocation remaining).

Quantification approach

Data source

Bureau of Meteorology.

Provided by

Bureau of Meteorology.

Method

The volume of water forfeited at the end of the 2011–12 year was calculated as summarised in the table below.

Calculation of forfeiture on the surface water liability in the Adelaide region for the 2011–12 year

Calculation

Line item

Volume (ML)

Volume available for abstraction (carryover) at the start of the year

5.1 Surface water allocation remaining (opening balance)


add   volume of water made available for abstraction during the year (announcement)

21.1 Surface water allocation announcement

3,412

less   volume of water diverted

17.11 Surface water allocation diversion

1,116

less   volume of water permitted to be carried over to the proceeding year

5.1 Surface water allocation remaining (closing balance)

377

equals

13.1 Adjustment and forfeiture of surface water allocation

1,919

Assumptions, limitations, caveats and approximations

There was a surface water allocation remaining at the start of the 2011–12 year (see table in 'Method') but it could not be quantified. The omission of this value in the calculation means the volume reported as forfeiture is underestimated.

Uncertainty information

The uncertainty estimate was not quantified.