Perth
4.5 Irrigation scheme claim on surface water

Supporting Information
Quantification Approach
Comparative year

Supporting Information

This line item represents the volume of surface water allocation remaining for irrigation supply licence entitlements at the end of the 2010–11 year.

Quantification Approach

Data Source

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

Provided by

Department of Water.

Method

For each surface water irrigation scheme supply licence, the licensed water management year is from 1 July to 30 June. At the end of the water management year, any unused allocation is forfeited. Therefore, the allocation remaining on 30 June 2011 is zero, as shown in the following table.

Volume of surface water allocation remaining for the irrigation scheme at the start and end of the 2010–11 year
	Account	Volume (ML)
	Opening balance (as at 30 June 2010)	0
add	21.3 Surface water allocation announcements	33,620
less	17.13 Surface water allocation diversion	32,952
less	13.3 Adjustment and forfeiture of surface water allocation	668
	Closing balance (as at 30 June 2011)	0

Assumptions, Limitations, Caveats and Approximations

Nil.

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 4.5
2011 Account line item	2010 Account line item	2011 Account volume at 30 June 2010 (ML)	2010 Account volume at 30 June 2010 (ML)	Change from the 2010 Account to the 2011 Account
4.5 Irrigation scheme claim on surface water	7.15 Non-physical water distribution asset–other lumped	0	0	Change in line item name and number

Perth4.5 Irrigation scheme claim on surface water