South East Queensland
17.11 Surface water allocation diversion

Supporting Information

a. Overall

This line item represents the volume of water diverted from surface water by non-urban (not SEQ Water Grid Manager or Toowoomba Regional Council) holders of supplemented allocations.

Diversions by non-urban holders of supplemented allocations
Water resource plan (WRP) area Water supply scheme (WSS) Volume
(ML)
Gold Coast Nerang 5
Total Gold Coast WRP area 5
Logan Basin Logan River 1,888
Total Logan Basin WRP area 1,888
Moreton Central Brisbane River and Stanley River1
Central Lockyer 433
Cressbrook Creek2 0
Lower Lockyer Valley 916
Pine Valleys4 0
Warrill Valley 2,663
Total Moreton WRP area 4,012
Total SEQ region 5,905

Notes:

  1. Central Brisbane River and Stanley River WSS supplemented allocation diversions were not available from Queensland Department of Environment and Resource Management's (DERM's) Water Management System (WMS) at the time of publication. These have ben reported as (–) in the 2011 Account.
  2. Cressbrook Creek WSS is used to supply water to the town of Toowoomba. All supplemented allocation diversions within the Cressbrook Creek WSS were included in line item 17.12 Surface water allocation diversion – urban water system.
  3. The diversions shown in the table exclude distribution loss volumes, as these were included in line item 13.1 Adjustment and forfeiture of surface water allocation.
  4. Pine Valleys WSS is used exclusively for urban water supply. All supplemented allocation diversions within the Pine Valleys WSS were included in line item 17.12 Surface water allocation diversion – urban water system.

 

 

b. Non-urban surface water allocation remaining – reconciliation

The following table shows the  non-urban surface water allocation reconciliation. Due to the very wet year, demand was lower than in previous years and combined with the 100% allocation announcements, this has resulted in a higher forfeiture of surface water allocation.

Non-urban surface water allocation reconciliation table
Water resource plan (WRP) area Water supply scheme (WSS)

Line item 5.1

Line item 21.1

Line item 17.11

Line item 13.1

Line item 5.1

Opening balance
(ML)
Announcement (ML) Allocation diversion
(ML)
Adjustment and forfeiture (ML) Closing balance (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 NA 7,316 0
Central Lockyer 0 7,201 433 6,768 0
Cressbrook Creek 0 0 0 0 0
Lower Lockyer Valley 11,676 12,778 916 11,304 12,234
Pine Valleys 0 0 0 0 0
Warrill Valley 0 31,504 2,663 28,841 0
Total Moreton WRP area 11,676 58,799 4,012 54,229 12,234
Total SEQ region 11,676 73,304 5,905 66,841 12,234


Quantification Approach

Data Source

DERM WMS database.

Provided by

DERM.

Method

Supplemented allocation diversions were provided by DERM from the WMS database for each water resource plan area. The current resource operation plan reporting requirements do not allow for reporting by 'type' of use. This line item was calculated by removing the urban diversions (line item 17.12 Surface water allocation diversion – urban water system) from the total supplemented allocation diversion. This represents the remaining high-priority holders and all medium-priority holder diversions.

Assumptions, Limitations, Caveats and Approximations

DERM has accepted metered data provided by water supply scheme (WSS) operators in good faith. The volume calculated excludes distribution loss, which was included in line item 13.1 Adjustment and forfeiture of surface water allocation.

Diversions for the following rural-based WSSs were not necessarily solely for irrigation purposes, and may have included some supplemented allocation diversions for urban purposes:

  • Central Lockyer WSS
  • Lower Lockyer WSS
  • Warrill Valley WSS
  • Logan River WSS.

Uncertainty Information

Derived from measured data. DERM reliability and accuracy rating is A2.

Comparative year

This line item corresponds to line item 14.7.9.7 Allocation diversion of regulated flows – other lumped holders reported in the 2010 Account.