South East Queensland

                                                                                                   

26.1.9.7 Adjustment and forfeiture of allocation on regulated flows — other lumped holders

                             

Supporting information   


The table below details the calculation of the adjustment and forfeiture of allocation on regulated flows of other lumped holders.

             
Adjustment and forfeiture of allocation on regulated flows – other lumped holders
  Water accounting statements line item Moreton WRP area  (ML) Logan Basin WRP area (ML) Gold Coast WRP area (ML) Total SEQ region (ML)
  8.1.9.7 Allocation on regulated flows remaining – other lumped holder (as at 1 July 2009) 4,534 0 0 4,534
plus 25.1.9.7 Allocation announcement on regulated flows – other lumped holders 77,640 14,503 5 92,148
less 14.7.9.7 Allocation diversion of regulated flows – other lumped holders 14,200 6,119 5 20,324
less 8.1.9.7 Allocation on regulated flows remaining – other lumped holder (as at 30 June 2010) 11,676 0 0 11,676
equals 26.1.9.7 Adjustment and forfeiture of allocation on regulated flows – other lumped holders 56,298 8,384 0 64,682

WRP = water resource plan

Lower Lockyer water supply scheme (WSS) has a water year from 1 April to 31 March. All unused Lower Lockyer WSS allocations at 30 June 2010 were not regarded as forfeiture but rather as carryover. Further information can be found in line item 8.1.2.7 Allocation on regulated flows remaining – other lumped holder.

This line item includes not only forfeiture, but also adjustments on the allocations. In some 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.

The Moreton, Logan Basin and Gold Coast resource operation plans (ROPs) did not come into effect until December 2009. Regions such as Central Brisbane, Stanley, Pine Valley and Cressbrook Creek became WSSs once the ROP was implemented. Reporting of metered usage within these regions was not required until this time. Some WSSs do not need to report metered use until the 2010–11 financial year. Although entitlements, allocations and diversions still occurred for the full reporting year within these regions, the diversion volumes for the allocations were not included in the water accounting statements as they could not be quantified accurately due to a lack of available data. As a result, the allocation diversions presented in the water accounting statements show a false low volume and the forfeiture a false high volume within the Moreton water resource plan (WRP) area.

All diversions associated with allocations on regulated flow other than high-security urban holders could not be identified into use or entitlement security categories. This resulted in diversions and forfeiture other than high-security urban holders being lumped into the allocations or diversions ‘other lumped holder’. For information on urban water use, please refer to the specific line items:

  • 26.1.2.4 High security urban holder forfeiture
  • 14.7.2.4 High security urban holder diversions
  • 26.1.9.7 High security urban holder allocation announcement.

The table below shows the surface water allocation carryover reconciliation.

                                                                           
Surface water allocation carryover reconciliation for year ending 30 June 2010
Allocation category Opening balance (ML) Announcement (ML) Allocation diversion (ML) Forfeiture (ML) Closing balance (ML)
High-security urban 0 422,930 175,727 247,203 0
High-security other 0 20,860 20,324 64,682 0
General-security other 4,534 71,288 11,676

 

Quantification approach   


Data source

  • Queensland Department of Environment and Resource Management (DERM), ROP and announced allocations
  • WSS operators and licence holders: Seqwater and Toowoomba Regional Council
  • DERM ROP and interim resource operation licence (IROL)
  • DERM, Water Entitlement Register Database and Water Management System

 

Data provider

Bureau of Meteorology, DERM.

 

Method

The forfeiture of allocation on regulated flows was derived using the calculation in the table below.

 

Calculation

Component

Adjustment and forfeiture of allocation on regulated flows – other lumped holders =

plus

8.1.9.7 Allocation on regulated flows remaining – other lumped holder (as at 1 July 2009)

plus

25.1.9.7 Allocation announcement on regulated flow – other lumped holders

minus

14.7.9.7 Allocation diversion of regulated flows – other lumped holders

minus

8.1.9.7 Allocation on regulated flows remaining – other lumped holder (as at 30 June 2010)

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

 

Uncertainty

Certain.

 

Approximations, assumptions, caveats and limitations

Please refer to the specific line items:

  • 8.1.9.7 Allocation on regulated flows remaining – other lumped holder (as at 1 July 2009)
  • 25.1.9.7 Allocation announcement on regulated flow – other lumped holders
  • 14.7.9.7 Allocation diversion of regulated flows – other lumped holders.