14.2 Adjustment and forfeiture of groundwater allocation - urban water system

Supporting Information

The volume recognised in the water accounting statements (989 ML) represents the allocation forfeited for urban groundwater entitlements in the Ord region during the 2010–11 year.  Forfeiture here occurs because the dates of the 'water year' of each allocation do not match the dates of the 2011 Account year.

Quantification Approach

Data Source

Department of Water: Water Resource Licensing (WRL) database and Annual Reports/Meter Card readings from licensees.

Provided by

Department of Water.


Any unused allocation cannot be carried over to a subsequent licence year. For each licensee, the portion of an entitlement that has not been abstracted by the end of the 2011 Account is forfeited.

That is, the portion of groundwater allocation that has not been abstracted at the end of the 2010–11 year is forfeited. The forfeiture is calculated as the total annual allocation for each licence minus total allocation extraction. However, given that the volume of extraction is estimated to be the full allocation (refer to line item 18.12), this component of the forfeiture is assumed to be zero.

Entitlements that are terminated during the 2010–11 year are also considered to be forfeitures.

Assumptions, Limitations, Caveats and Approximations

Forfeiture is calculated based on available extraction data. Where the extraction data are estimated, the forfeiture is subject to the same assumptions and limitations of the extraction data. Refer to Line item 18.12 Groundwater allocation extraction – urban water system.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

The following table compares the value for the 2009–10 year reported in this account with the corresponding value reported in the 2010 Account.

Comparative information from the 2010 Account for line item 14.2

2011 Account line item

2010 Account line item

Value reported in the 2010 Account (ML)

Value reported in the 2011 Account (ML)

Additional information

14.2 Adjustment and forfeiture of groundwater allocation – urban water system Adjustment and forfeiture of groundwater allocation – urban holder



Volume restated due to subsequent availability of actual meter readings