Sydney
11.14 Other delivery of water to urban water system
Supporting Information
Delta Electricity diverted 21,308 ML from Thomsons Creek Reservoir, Lake Lyell and Lake Wallace for the Mt Piper and Wallerawang power stations.
Quantification Approach
Data Source
Provided by
Method
Ultrasonic flow meters were used to measure flow from Lake Lyell, Lake Wallace and Thomsons Creek Reservoir to the Mt Piper and Wallerawang power stations.
Assumptions, Limitations, Caveats and Approximations
The volume of water diverted from the Coxs River system to the power stations (21,308 ML)is based on the total volume of water extracted and includes the volume reported in line item 9.10 (4,885 ML).
Uncertainty Information
The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/– 2%. Meters are regularly calibrated. 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 |
11.14 Other delivery of water to urban system |
19.8.8 Allocation diversion into the urban water supply system – other lumped |
22,821 |
22,821 |
Change in line item name |