Adelaide
4.2 Irrigation scheme inter-region claim on water

Supporting Information

The Adelaide irrigation scheme has an inter-region claim to River Murray water. This claim is facilitated by Barossa Infrastructure Limited's (BIL) Class 3a water access entitlement to shares in the River Murray consumptive pool for South Australia. This type of entitlement is typically intended for irrigation purposes. River Murray water is transferred through SA Water infrastructure and is then delivered to BIL. More details of the Class 3a water access entitlement can be found in the Water Allocation Plan for the River Murray Prescribed Watercourse.

The opening balance reported (2,277 ML) was the volume of water permitted to be carried over (rolled over) from the 2009–2010 year against the River Murray Class 3a entitlement held by BIL.

The closing balance reported (0 ML) was the volume of water permitted to be carried over (rolled over) from the 2010–11 year. Temporary carryover arrangements that were provided as an annual contingency during the drought ceased on 30 June 2011, therefore the the volume of water permitted to be carried over was 0 ML. 

The opening and closing balance of the inter-region claim, increases to the inter-region claim due to allocation announcements and trades, delivery of water under the inter-region claim and decreases to the inter-region claim due to trade and forfeiture of unused water in the 2010–11 year are provided in the following table. Links to individual line items are also provided.

Calculations of BIL's inter-region claim to River Murray water for the 2010–11 year

Calculation

Line item

Volume (ML)

Opening balance

4.2 Irrigation scheme inter-region claim on water

2,277

add

12.12 Increase of irrigation scheme inter-region claim on water

3,850

less

12.6 Delivery of water ro irrigation scheme under inter-region agreement

2,301

less

20.9 Decrease of irrigation scheme inter-region claim on water

3,826

Closing balance

4.2 Irrigation scheme inter-region claim on water

0

Quantification Approach

Data Source

South Australian Department for Water: Water Information and Licence Management Administration System (WILMA) database.

Provided by

South Australian Department for Water.

Method

The volume reported as carryover from the 2009–10 year was recorded in the South Australian Department for Water's WILMA database.

The volume reported as carryover from the 2010–11 year was 0 ML. This was the result of changes in the allocation carryover policy by the South Australian Government. On the 1st July 2011, the South Australian Minister for Sustainability, Environment and Conservation announced in the South Australian Government Gazette that River Murray allocations would be 100% percent of the nominal maximum water allocation for the 2011–12 year. Temporary carryover arrangements that were provided as an annual contingency during the drought ceased on 30 June 2011, therefore the volume of water permitted to be carried over was 0 ML.

Assumptions, Limitations, Caveats and Approximations

Nil.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

This line item is new to the 2011 Account due to the inclusion of a separate irrigation scheme store. The restated volume for the comparative year closing balance for this item was 2,277 ML. The restated volume for the comparative year opening balance was not reported as this data was not available.