Sydney
13.1 Adjustment and forfeiture of surface water allocation

The liability decrease to the surface water store from the adjustment of the surface water allocation on other lumped holders, industrial and commercial holders and stock and domestic holders is 125,455 ML.

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

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

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

Under the Water Sharing Plan, carryover of any unused allocation at the end of the year is allowed for licences issued to other lumped holders, and stock and domestic holders. The maximum volume of carryover allowed is determined by the rules in the Water Sharing Plan and the volume of water diverted under the licence. As the volume of water diverted under these licences is an estimate (refer to line item 17.11 Entitled diversion of allocated surface water to users), the carryover volume could not be quantified. Therefore, for the purposes of the National Water Account, the carryover volume (opening and closing balance as reported in 5.1 Surface water allocation remaining) was assumed to be zero. In order to the balance the account, the liability decrease reported in this line item is equal to any remaining unused allocation.

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.

• Carryover has not been quantified.
• Diversions made under the category of stock and domestic or other lumped holder have been estimated.
  

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

Due to the updates reported in 17.11 Entitled diversion of allocated surface water to users and 21.1 Surface water allocation announcements the value reported in the 2011 Account has been restated from 125,738 ML to 118,465 ML.