Sydney
3.4 Urban inter-region claim on water
Supporting Information
The volume for the line item is 216 ML.
Delta Electricity was entitled to 0 ML carry-over volume from the Fish River Water Supply Scheme at the beginning of the 2010–11 year. The carry-over volume was an inter-basin claim to receive water to Delta Electricity's water distribution systems.
By 30 June 2011, Delta Electricity had a carry-over volume of 216 ML. Reconciliation of this line item is shown in the following table.
| Calculation |
Line item |
Volume (ML) |
|
Opening balance (as at 1 July 2010) |
0 |
add |
11.15 Increase of inter-region claim on water by urban water system |
5,399 |
less |
11.9 Delivery of water to urban system under inter-region agreement |
5,183 |
less |
0 |
|
equals |
Closing balance (as at 30 June 2011) |
216 |
Quantification Approach
Data Source
Provided by
Method
Carry-over volume available at the beginning of a year from the FRWSS is calculated from entitlement holder's allocation and metered supply volume for the previous two years (carry-over volume is capped at 20% of the maximum annual quantity). The metered supply volume is based on flow measurements by NSW State Water Corporation using ABB magflow meters.
Assumptions, Limitations, Caveats and Approximations
Uncertainty Information
The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/– 2%. Meters are calibrated annually by ABB (meter supplier). The NSW Office of Water conducts an annual verification review on Delta Electricity's water data.
Comparative year
The following table compares the value at 30 June 2010 reported in this account with the corresponding value reported in the 2010 Account.
2011 Account line item |
2010 Account line item |
Value reported in the 2010 Account (ML) |
Value reported in the 2011 Account (ML) |
Additional information |
3.4 Other urban claims on water |
7.15 Non-physical water distribution system asset – other lumped |
0 |
0 |
Change in line item name |