Canberra
19.17 Decrease of urban claim on surface water

Supporting Information

For the purpose of the 2011 Account, any volume of water allocated to ACTEW under their 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.


Adjustment and forfeiture on ACTEW's urban water licence
  Line item / adjustment Volume (ML)
  21.2 Surface water allocation announcements – urban water system 71,000
less 17.2 Surface water allocation diversion – urban water system 45,309
add Googong transfer
4,365
equals Adjustment and forfeiture 30,056

Quantification Approach

Data Source

Australian Capital Territory (ACT) Government Department of Environment, Climate Change, Energy and Water: Water Resource Information Database.

Provided by

ACT Government Department of Environment, Climate Change, Energy and Water: Water Resource Information Database.

Method

Unused allocation at the end of the reporting period (30 June 2011) 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 17.2 Surface water allocation diversion – urban system).

The potable water discharge into Googong Reservoir from Mount Stromlo Water Treatment Plant was obtained from ActewAGL. The Googong transfer was added to the allocated volume (line item 17.2 Surface water allocation diversion – urban system).

Assumptions, Limitations, Caveats and Approximations

Nil.

Uncertainty Information

The uncertainty estimate was not quantified.