Sydney
3.7 Urban claim on surface water
Supporting information
This line item volume of 0 ML represents the volume of surface water allocation remaining for urban water supply licence entitlements in the Sydney region at the end of the 2012–13 year.
While carry-over of unused surface water allocation is allowed under the Water Sharing Plan for the Greater Metropolitan Region Unregulated River Water Sources for licences categorised under 'local water utility', the carry-over volume could not be quantified. Therefore, for the purposes of the National Water Account, the opening and closing balance (carry-over volume) has been adjusted to 0 ML.
Quantification approach
Data source
Water Sharing Plan for the Greater Metropolitan Region Unregulated River Water Sources for entitlement data and licensing rules.
Provided by
Calculated opening and closing balances provided by the Bureau of Meteorology; entitlement data is from the New South Wales Office of Water.
Method
The calculation method for this line item is outlined in the table below.
|
Account |
Volume (ML) |
|
Opening balance (at 30 June 2012) |
0 |
add |
1,040,588 |
|
less |
11.12 Allocation diversion of surface water to urban water system |
542,715 |
less |
497,873 |
|
equals |
Closing balance (at 30 June 2013) |
0 |
Under the water sharing plan, carry-over of any unused allocation at the end of the water year (1 July–30 June) is allowed for licences not issued under the 'major utility' category. The maximum volume of carry-over allowed is determined by the rules in the water sharing plan and the volume of water diverted under the licence. The carry-over volume for the licences reported under this line item have not been quantified. Therefore, for the purposes of the National Water Account, the carry-over volume (opening and closing balance as reported here) was assumed to be zero. In order to balance the account, the liability decrease reported in this line item is equal to any remaining unused allocation. As carry-over is restricted to licences not issued under the Major utility category, it is assumed the carry-over will be small.
Calculation methods for the announced allocation and measured diversions are available in:
- 11.18 Increase of urban claim on surface water for the announced allocation
- 11.12 Allocation diversion of surface water to urban water system for metered diversions from storages.