South East Queensland
13.1 Adjustment and forfeiture of surface water allocation

The volumetric value for the line item at the end of the 2012–13 year was 67,318 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.

Volume of adjustment and forfeiture of non-urban surface water allocations

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 2012)	12,153	0	0	12,153
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	4,093	1,888	5	5,986
less	5.1 Surface water allocation remaining (as at 30 June 2013)	12,153	0	0	12,153
equals	13.1 Adjustment and forfeiture of surface water allocation	54,706	12,612	0	67,318

Lower Lockyer water supply scheme (WSS) water year is from 1 April–31 March. All unused Lower Lockyer WSS allocations at 30 June 2013 were not regarded as forfeiture but rather as allocation remaining at the end of the 2012–13 year (1 July 2012–30 June 2013). The volume reported represents the unused water allocation that remains available for use until 31 March 2014. 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.

The following table shows the non-urban surface water allocation reconciliation. A relatively lower carryover volume at the beginning of the 2012–13 year has resulted in a lower forfeiture of surface water allocation compared to that reported for the 2012 Account.

Non-urban surface water allocation reconciliation

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	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 Creek1	0	0	0	0	0
	Lower Lockyer Valley	12,153	12,778	997	11,781	12,153
	Pine Valleys	0	0	0	0	0
	Warrill Valley	0	31,504	2,663	28,841	0
	Total Moreton WRP area	12,153	58,799	4,093	54,706	12,153
Total South East Queensland (SEQ) region		12,153	73,304	5,986	67,318	12,153

¹Cressbrook Creek WSS is used to supply the north and north-western townships of Toowoomba Regional Council region as well as Toowoomba City.
 

Seqwater: surface water allocation.

Seqwater.

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
	5.1 Surface water allocation remaining (as at 1 July 2012)
add	21.1 Surface water allocation announcements
less	17.11 Entitled diversion of allocated surface water to users
less	5.1 Surface water allocation remaining (as at 30 June 2013)
equals	13.1 Adjustment and forfeiture of surface water allocation (as at 30 June 2013)

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

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

There was no uncertainty associated with this value.

The Bureau of Meteorology recalculated the 2011-12 year volume using the corrected dataset on allocation diversion 17.11 Entitled diversion of allocated surface water to users as obtained from Seqwater. Consequently, the volume has been restated from 68,055 ML (as published in the 2012 Account) to 67,399 ML.