19.17 Adjustment and forfeiture of urban claim on surface water
The volume recognised in the surface water statements (29,210 ML) represents the total forfeiture of surface water allocations for the urban water system in the Canberra region during the 2011–12 year.
For the purpose of the 2012 Account, any volume of water allocated to ACTEW under its urban water licence (line item 21.2 Surface water allocation announcements – urban water system) that has not been diverted (line item 17.12 Surface water allocation diversion – urban water system) has been considered as forfeited.
In addition to forfeited water, this line item also includes an adjustment to account for potable water releases into Googong Reservoir from Mount Stromlo water treatment plant (WTP).
|21.2 Surface water allocation announcements–urban water system||71,000|
|less||17.12 Surface water allocation diversion–urban water system||41,790|
Water Resource Information Database.
ACT Government, Environmental and Sustainable Development Directorate.
Unused allocation at the end of the reporting period (30 June 2012) was considered as forfeiture. Diversions from Bendora, Corin, Cotter and Googong reservoirs together with diversions from the Murrumbidgee River were subtracted from the allocated volume (line item 17.12 Surface water allocation diversion–urban water system).
The potable water discharge into Googong Reservoir from Mount Stromlo WTP was obtained from ACTEW Water. The Googong transfer was added to the allocated volume (line item 17.12 Surface water allocation diversion–urban water system).
Assumptions, limitations, caveats and approximations
The uncertainty estimate was not quantified.
This line item corresponds to line item 19.17 'Decrease of urban claim on surface water' reported in the 2011 Account.