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.
| 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.
| Water resource plan (WRP) area | Water supply scheme (WSS) |
|||||
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 |
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.
- line item 5.2 Surface water allocation remaining – urban water system
- line item 17.12 Entitled diversion of allocated surface water to urban water system
- line item 21.2 Surface water allocation announcements – urban system.
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.