Daly
14.1 Adjustment and forfeiture of groundwater allocation

Supporting information

The volume recognised in the water accounting statements (46,294 ML) represents the total forfeiture of water allocations for all groundwater supply to individual users in the Daly region during the 2011–12 year.

Quantification approach

Data source

Water Resource Licensing database and meter readings from licensees.

Provided by

Department of Land Resource Management.

Method

The portion of groundwater allocation that has not been abstracted at the end of the 2011–12 year is forfeited, i.e. there is no carry-over of entitlements into next year's account.

The groundwater supply licences for the Daly region have a water management year that ends on 30 April. Therefore, the forfeiture reported for individual user licences is calculated as the total annual allocation less the total allocation diversion between 1 May 2011 and 30 April 2012, as shown in the following table.


Total forfeiture of groundwater allocation for individual users during the 2011–12 year

 

Account

Volume (ML)

 

Groundwater allocation announcement (on 1 May 2011)1

60,125

less

Allocated groundwater diversion (1 May 2011 to 30 April 2012)2

13,831

 

Forfeiture on 30 April 2012

46,294

1-2. Volumes are based on data for the 2010–11 year, which are not reported in the water accounting statements

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 18.11).

Uncertainty information

The uncertainty estimate was not quantified.