Adelaide
19.14 Adjustment and forfeiture of urban inter-region claim on water

Supporting information

The volume reported (61,580 ML) represents the total adjustment and forfeiture of SA Water's River Murray water access entitlement (WAE) allocation during the 2012–13 year.

Quantification approach

Data source

SA Water: Supervisory Control and Data Acquisition database or manual field instrument readings, stored in the MetDaily file; South Australian Department of Environment, Water and Natural Resources (DEWNR): Water Information and Licence Management Administration (WILMA) database; Bureau of Meteorology: calculations of adjustment/forfeiture.

Provided by

Bureau of Meteorology.

Method

The volume reported at this line item was calculated as the sum of two components: Adjustment and forfeiture.

Adjustment

The volume of River Murray water imported into the Adelaide region under the Class 6 WAE (reported at line item 11.9 Delivery of water to urban water system under inter-region agreement) was different from the total volume of water abstracted from the River Murray (the volume used to debit SA Water's allocation account) under the Class 6 WAE during the 2012–13 year, due to off-takes of water to users located outside the Adelaide region, transfer losses and quantification errors. An adjustment was calculated as shown in the following table to account for this difference.

Calculation of adjustment for SA Water's River Murray allocation during the 2012–13 year
Account Volume (ML)
volume of abstracted from the River Murray under the Class 6 WAE1 81,673
11.9 Delivery of water to urban water system under inter-region agreement (68,420)
Adjustment 13,253

1Sourced from the DEWNR WILMA licensing database

Forfeiture

Carry-over of water allocated against the Class 6 WAE is not permitted (South Australian Murray–Darling Basin Natural Resources Management Board 2011); therefore any unused water is forfeited. Forfeiture of the inter-region claim to water was calculated as shown in the following table.

Calculation of forfeiture of SA Water's River Murray allocation during the 2012–13 year
Account Volume (ML)
11.15 Increase of inter-region claim on water by urban water system 130,000
11.9 Delivery of water to urban water system under inter-region agreement (68,420)
adjustment (see previous table) (13,253)
Forfeiture 48,327

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

The uncertainty estimate was not quantified.