South East Queensland
13.1 Adjustment and forfeiture of surface water allocation
Supporting information
a. Overall
The volumetric value for the line item at the end of the 2011–12 year was 68,055 ML.
The following table details the calculation of the adjustment and forfeiture of surface water allocation, where the allocation is not held by urban utilities.
| Calculation | Line item |
Moreton Water Resource Plan (WRP) area |
Logan Basin WRP area |
Gold Coast WRP area |
Total SEQ region |
(ML) |
(ML) |
(ML) |
(ML) |
||
| 5.1 Surface water allocation remaining (as at 1 July 2011) | 12,234 |
0 |
0 |
12,234 |
|
| add | 21.1 Surface water allocation announcements | 58,799 |
14,500 |
5 |
73,304 |
| less | 17.11 Entitled diversion of allocated surface water to users | 4,012 |
1,888 |
5 |
5,905 |
| less | 5.1 Surface water allocation remaining (as at 30 June 2012) | 11,578 |
0 |
0 |
11,578 |
| equals | 13.1 Adjustment and forfeiture of surface water allocation | 55,443 |
12,612 |
0 |
68,055 |
Lower Lockyer water supply scheme (WSS) water year is from 1 April to 31 March. All unused Lower Lockyer WSS allocations at 30 June 2012 were not regarded as forfeiture but rather as allocation remaining at the end of the 2011–12 year (1 July 2011 to 30 June 2012). The volume reported represents the unused water allocation that remains available for use until 31 March 2013. Further information can be found in line item 5.1 Surface water allocation remaining.
This line item includes forfeiture, and adjustments on allocations. In some WSSs, allocation announcements were made for distribution loss entitlements (Central Lockyer WSS, Lower Lockyer WSS and Warrill Valley WSS). 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.
b. Non-urban surface water allocation remaining – reconciliation
The following table shows the non-urban surface water allocation reconciliation. A relatively higher carryover volume at the beginning of the 2011–12 year has resulted in a higher forfeiture of surface water allocation compared to that reported for the 2011 Account.
| 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 |
5 |
5 |
0 |
0 |
| Total Gold Coast WRP area | 0 |
5 |
5 |
0 |
0 |
|
| Logan Basin | Logan River | 0 |
14,500 |
1,888 |
12,612 |
0 |
| Total Logan Basin WRP area | 0 |
14,500 |
1,888 |
12,612 |
0 |
|
| Moreton | Central Brisbane River and Stanley River | 0 |
7,316 |
0 |
7,316 |
0 |
| Central Lockyer | 0 |
7,201 |
433 |
6,768 |
0 |
|
| Cressbrook Creek | 0 |
0 |
0 |
0 |
0 |
|
| Lower Lockyer Valley | 12,234 |
12,778 |
916 |
12,518 |
11,578 |
|
| Pine Valleys | 0 |
0 |
0 |
0 |
0 |
|
| Warrill Valley | 0 |
31,504 |
2,663 |
28,841 |
0 |
|
| Total Moreton WRP area | 12,234 |
58,799 |
4,012 |
55,443 |
11,578 |
|
| Total SEQ region | 12,234 |
73,304 |
5,905 |
68,055 |
11,578 |
|
Quantification approach
Data source
Seqwater WaterHub database, this information was previously provided by DERM but commencing with the 2012 Account, it has since been provided by Seqwater.
Provided by
Seqwater.
Method
The adjustment and forfeiture of surface water allocation was derived using the calculation in the following table.
Calculation |
Line item |
|
5.1 Surface water allocation remaining (as at 30 June 2011) |
add |
|
less |
17.11 Entitled diversion of allocated surface water to users |
less |
5.1 Surface water allocation remaining (as at 30 June 2012) |
equals |
13.1 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 5.1 Surface water allocation remaining
- line item 17.11 Entitled diversion of allocated surface water to users
- line item 21.1 Surface water allocation announcements.
Uncertainty information
There was no uncertainty associated with this value.