Sydney
13.1 Adjustment and forfeiture of surface water allocation

The liability decrease to the surface water store from the adjustment and forfeiture of the surface water allocation on other lumped holders and stock and domestic holders is 125,738 ML.

 Reconciliation of this line item is shown in the following table.

Calculation of surface water allocation for the 2010-11 year

Calculation	Line item	Volume (ML)
	5.1 Surface water allocation remaining – opening balance	0
add	21.1 Surface water allocation announcements	149,535
less	17.11 Surface water allocation diversion	23,797
less	5.1 Surface water allocation remaining – closing balance	0
equals	13.1 Adjustment and forfeiture of surface water allocation	125,738

Draft Water Sharing Plan – Greater Metropolitan Unregulated River Water Sources; entitlement data recorded in databases and water management licences by NSW Office of Water; diversions from Goulburn Mulwaree Council, NSW Office of Water and Sydney Water Corporation.

The Bureau of Meteorology calculated opening and closing balance; The NSW Office of Water, Goulburn Mulwaree Council and Sydney Water Corporation provided entitlement data and diversions.

Water management licences issued for other lumped holders, and stock and domestic holders by the NSW Office of Water applicable to 2010–11 did not make provisions for the carry-over of any remaining allocation at the end of the year. Therefore, forfeiture of allocation on flows for these categories is the difference between the announced allocation/claim and measured diversions from the storages for 2010–11. Calculation methods for the announced allocation and measured diversions are available in:

• line item 21.1 for the volumetric value for the announced allocation
• line item 17.11 for metered diversions from storages.

Nil.

For entitlements - the allocation/claim was derived from the Draft Water Sharing Plan – Greater Metropolitan Unregulated River Water Sources.  Uncertainty was not quantified.

Goulburn Mulwaree Council – the volume is based on metered data. Estimated accuracy based on meter accuracy and professional judgment is +/– 20%.

Sydney Water Corporation - the volume is based on measured data. Estimated accuracy based on meter accuracy is +/– 2%.

The following table compares the value at 30 June 2010 reported in this account with the corresponding value reported in the 2010 Account.

 

Comparative information from the 2010 Account for line item 13.1

2011 Account line item	2010 Account line item	Value reported in the 2010 Account (ML)	Value reported in the 2011 Account (ML)	Additional information
13.1 Adjustment and forfeiture of surface water allocation	23.12 Non-physical water distribution system increases – other lumped	Not stated	91,727	Restatement: The liability associated with this line item was not recognised in the 2010 Account. In order to be consistent with the recording of water rights in the National Water Account, the liability and forfeiture has been included