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 2012–13 year was 6,879 ML: a breakdown by organisation is shown in the following table.

Sydney Catchment Authority and Delta Electricity all had an inter-basin claim on the Fish River Water Supply Scheme during the 2013 Account. This line item represents the diversion made under that entitlement.

Volume of water diverted from the Fish River Water Supply Scheme during the 2012–13 year

Organisation

Diversions
(ML)
Delta Electricity
 5,865
Sydney Catchment Authority 1,014

Total

6,879

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 2012–13.

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%.

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

The volume previously reported in the 2011–12 year included the Lithgow diversion of 17 ML. As Lithgow City Council diversions are now part of the urban water store this volume is now accounted for in line item 11.9 Delivery of water to urban water system under inter-region agreement.

Therefore, the volume reported in the 2011–12 year has been restated as 4,166 ML.