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

The volume recognised in the water accounting statements (954 ML) represents the total forfeiture of water allocations for urban groundwater entitlements in the Ord region during the 2011–12 year.

The urban water supply licences relate to groundwater extraction from local bore fields for:

• Kununurra town supply
• Halls Creek town supply.

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

The water supply licences for Kununurra and Halls Creek town supply have a water management year that ends on 31 March. Therefore, the forfeiture reported for both urban licences are calculated as the allocation remaining on 1 July minus the total allocation extraction between 1 July–31 March.

Total forfeiture for both urban water supply licences is the forfeiture reported on 31 March of the reporting year. 

Forfeiture is calculated based on available extraction data. Monthly abstraction data were not available this year; therefore, to calculate forfeiture on 31 March 2013 it was assumed that the rate of abstraction was uniform throughout the reporting period. This is unlikely to be the case.

The uncertainty estimate was not quantified.