Adelaide
14.1 Adjustment and forfeiture of groundwater allocation

Supporting information

The volume reported as forfeiture (24,851 ML) is the volume of groundwater allocated but not abstracted by the end of the 2011–12 year that licensees were not permitted to carryover to the next year, according to the carryover rules detailed in the relevant water allocation plans.

For more information on this groundwater liability see line item 6.1 Groundwater allocation remaining.

Quantification approach

Data source

Bureau of Meteorology (the Bureau).

Provided by

Bureau of Meteorology.

Method

The volume of water forfeited at the end of the 2011–12 year was calculated based on the volume of water available for abstraction under the groundwater liability, the volume of water abstracted under the groundwater liability, and the volume of allocated groundwater permitted to be carried over. This calculation is summarised in the following table.

 

Calculation of forfeiture on the groundwater liability in the 2011–12 year

Calculation

Line item

Volume (ML)

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

6.1 Groundwater allocation remaining (opening balance)

4,948

add   volume of water made available for abstraction during the year

22.1 Groundwater allocation announcement

43,923

less   volume of water extracted

18.11 Groundwater allocation extraction

17,379

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

6.1 Groundwater allocation remaining (closing balance)

6,641

equals

14.1 Adjustment and forfeiture of groundwater allocation

24,851

Assumptions, limitations, caveats and approximations

This approach assumes that all unused allocated water is forfeited.

Uncertainty information

The uncertainty estimate was not quantified.

Comparative year

The volume of line item 6.1 'Groundwater allocation remaining' at 30 June 2011 has been restated in the 2012 Account. As this volume appears in the calculation of the 2010–11 year volume of line item 14.1 'Adjustment and forfeiture of groundwater' allocation, the volume of line item 14.1 has been restated from 25,832 ML in the 2011 Account to 24,445 ML in the 2012 Account as shown in the following table.


Restatement of comparative year information for line item 14.1 Adjustment and forfeiture of groundwater allocation
Calculation Line item

2012 Account volume for the 2010–11 year (ML)

2011 Account volume for the 2010–11 year (ML)

Volume available for abstraction (carryover) at the start of the year 6.1 Groundwater allocation remaining (opening balance)

2,857

2,857

add   volume of water made available for abstraction during the year 22.1 Groundwater allocation announcement

41,555

41,555

less   volume of water extracted 18.11 Groundwater allocation extraction

15,019

15,019

less   volume of water permitted to be carried over to the next year 6.1 Groundwater allocation remaining (closing balance)

4,948

3,561

equals 14.1 Adjustment and forfeiture of groundwater allocation

24,445

25,832