South East Queensland
19.17 Adjustment and forfeiture of urban claim on surface water

Supporting information

a. Overall

The volumetric value for the line item at the end of the 2011–12 year was 230,474 ML.

This line item represents the adjustment and forfeiture of supplemented surface water allocations held by urban utilities and the SEQ Water Grid Manager. The following table details the calculation of the adjustment and forfeiture.  

Volume of adjustment and forfeiture of surface water allocations - urban water system
Calculation

Line item

Gold Coast Water Resource Plan (WRP) area

Logan Basin WRP area

Moreton WRP area

Total SEQ region

(ML)

(ML)

(ML)

(ML)

  3.7 / 5.2 (remaining as at 30 June 2011)

0

0

0

0

add 11.18 / 21.2 Surface water allocation announcements – urban system

83,995

8,910

349,921

442,826

less 11.12 / 17.12 (diversion)

62,763

1,456

148,133

212,352

less 3.7 / 5.2 (remaining as at 30 June 2012)

0

0

0

0

equals 13.2 / 19.17 Adjustment and forfeiture of urban claim on surface water

21,232

7,454

201,788

230,474

 

This line item includes forfeiture, and adjustments on allocations. In some water supply schemes (WSSs), allocation announcements were made for distribution loss entitlements. These allocations cover conveyance losses from delivering water for other allocations. All distribution loss allocation usage has been included as adjustments in this line item as use is within stream and cannot be considered a diversion.

This line item includes an adjustment term of 6,165 ML to account for the transfer of water from Wivenhoe Dam to Toowoomba. This transfer was undertaken by Toowoomba regional council, the Cressbrook Creek WSS operator and resource operations licence (ROL) holder. This transfer is also shown in line item 17.21 Other surface water decrease.

 

b. Urban surface water allocation remaining – reconciliation

The following table shows the urban surface water allocation reconciliation. Demand was lower in 2012 than in the previous year and combined with the 100% allocation announcements, this has resulted in higher forfeiture of urban surface water allocation (around 52%) than that reported for the 2011 Account.

Urban surface water entitlements have a component included within them to allow for some future population growth. A component of the forfeiture may be attributed to this reason.  

 

Urban surface water allocation reconciliation table
Water resource plan (WRP) area

Water supply scheme (WSS)

Line item 5.2

Line item 21.2

Line item 17.12

Line item 13.2

Line item 5.2

Opening balance

Announcement (ML)

Allocation diversion

Adjustment and forfeiture (ML)

Closing balance (ML)

(ML)

(ML)
Gold Coast Nerang

0

83,995

62,763

21,232

0

Total Gold Coast WRP area

0

83,995

62,763

21,232

0

Logan Basin Logan River

0

8,910

1,456

7,454

0

Total Logan Basin WRP area

0

8,910

1,456

7,454

0

Moreton Central Brisbane River and Stanley River

0

278,725

110,815

167,910

0

Central Lockyer

0

0

0

0

0

Cressbrook Creek

0

10,000

0

10,000

0

Lower Lockyer Valley

0

0

0

0

0

Pine Valleys

0

59,000

36,894

22,106

0

Warrill Valley

0

2,196

424

1,772

0

Total Moreton WRP area

0

349,921

148,133

201,788

0

Total SEQ region

0

442,826

212,352

230,474

0

There is no carryover in the SEQ region and urban surface water allocation remaining (line item 5.2) will be always zero.

c. Urban entitlements

For the purpose of the 2012 Account, the urban claim on surface water only includes the SEQ Water Grid Manager and Toowoomba regional council entitlement allocations, as they have been identified as the urban holders of entitlements in the resource operations plans (ROPs).

Other organisations may hold supplemented entitlements for some form of urban use. As urban use is not identified on entitlements these could not readily be identified. For this reason, a small number of entitlements that may fall into this category are included in line item 21.1 Surface water allocation announcements.

In Queensland, entitlements and allocations do not have intended use as an attribute, and metered abstractions do not have entitlement priority or use as attributes. Urban holders of entitlements were individually determined by obtaining all entitlement volumes from the Gold Coast, Logan Basin and Moreton ROPs schedule of water allocations listed for the SEQ Water Grid Manager and Toowoomba regional council.

 

Quantification approach

Data source

Queensland Department of Natural Resources and Mines (DNRM): ROPs and announced allocations. WSS operators and ROL/ Interim ROL holders. DNRM, Water Entitlement Register Database and Water Management System, Toowoomba regional council. 

Provided by

Bureau of Meteorology and DNRM.

Method

The adjustment and forfeiture of surface water allocation was derived using the calculation in the following table.

Calculation method for adjustment and forfeiture of surface water allocation

Calculation

Line item

 

5.2 Surface water allocation remaining – urban water system ( as at 30 June 2011)

add

21.2 Surface water allocation announcements – urban water system

less

17.12 Entitled diversion of allocated surface water to urban water system

less

5.2 Surface water allocation remaining – urban water system ( as at 30 June 2012)

equals

13.2 Adjustment and forfeiture of surface water allocation (as at 30 June 2012)

Please refer to the specific line item components used in the calculation for the individual assumptions.


 


Assumptions, limitations, caveats and approximations

Please refer to the specific line items used in the calculation of this line item for specific assumptions, approximations, caveats/limitations.

 

Uncertainty information

There was no uncertainty associated with this value.

Comparative year

This line item corresponds to line item '19.17 Decrease of urban claim on surface water' reported in the 2011 Account.