20.12 Decrease of irrigation scheme claim on surface water

Supporting Information

This line item refers to the total forfeiture of water allocations for the major surface water storages that supply water to the irrigation scheme.

Quantification Approach

Data Source

Department of Water: Water Resource Licensing database, Harvey Water: Supervisory Control and Data Acquisition system.

Provided by

Department of Water.


The portion of surface water allocation that has not been abstracted at the end of the 2010–11 year is forfeited. That is, there is no carryover of entitlements into next year's account.

The forfeiture is calculated as the total annual allocation minus total allocation diversion, as shown in the following table.


Total forfeiture of surface water allocation for the irrigation scheme during the 2010–11 year



Volume (ML)


21.3 Allocation announcement



17.13 Allocation diversion



Forfeiture on 30 June 2011



Assumptions, Limitations, Caveats and Approximations


Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

The following table presents substantive changes in the line item reported in this 2011 Account with the corresponding line item in the 2010 Account.


Comparative year information for line item 20.12

2011 Account line item

2010 Account line item

2011 Account volume for the 2009–10 year (ML)

2010 Account volume for the 2009–10 year (ML)

Change from the 2010 Account to the 2011 Account

20.12 Decrease of irrigation scheme claim on surface water

24.12 Non-physical water distribution system decreases–other lumped



Change in line item name and number