Sydney
9.11 Delivery of water under inter–region agreement to surface water

Supporting information

The total diversion from the Fish River Water Supply Scheme during the 2011–12 year was 4,183 ML: a breakdown by organisation is shown in the following table.

Sydney Catchment Authority, Lithgow City Council and Delta Electricity all had an inter–basin claim on the Fish River Water Supply Scheme during the 2012 Account. This line item represents the diversion made under that entitlement.

Volume of water diverted from the Fish River Water Supply Scheme during the 2011–12 year

Organisation

 Diversions
(ML)
Delta Electricity
 4,141

Lithgow City Council

17
Sydney Catchment Authority 25

Total

4,183


Further details of the Fish River Water Supply Scheme are provided in line item 1.5 Inter–region claim on water.

Quantification approach

Delta Electricity

Data source

Fish River Water Supply Scheme Weekly Use Report 2011–12.

Provided by

New South Wales Office of Water.

Method

The metered supply volume is based on flow measurements provided by the New South Wales State Water Corporation using ABB magflow meters.

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/–2%.

Lithgow City Council

Data source

Lithgow City Council, spreadsheets; New South Wales Office of Water Fish River Water Supply Scheme Weekly Use Report 2011–12.

Provided by

Lithgow City Council and New South Wales Office of Water.

Method

The metered supply volume is based on flow measurements by New South Wales State Water Corporation using ABB magflow meters.

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/–2%.

Sydney Catchment Authority

Data source

Sydney Catchment Authority databases.

Provided by

Sydney Catchment Authority.

Method

Metered supply volume to Sydney Catchment Authority is based on flow measurements using a turbine helix-type flow meter.

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

Uncertainty value is based on meter accuracy at +/– 2%.

Comparative year

This line item corresponds to line item 9.11 Delivery of water under inter–region agreement reported in the 2011 Account.

In the 2010–11 year, this line item only included the Sydney Catchment Authority's diversions from the Fish River Water Supply Scheme. In the 2011–12 year, this line item also recognises Delta Electricity and Lithgow City Council diversions from the Fish River Water Supply Scheme previously reported in 11.9 Delivery of water to urban water system under inter–region agreement (5,183 ML). Consequently, the volume has been restated from 224 ML to 5,407 ML and the line item 11.9 Delivery of water to urban water system under inter–region agreement has been removed from the Sydney account.