South East Queensland
21.2 Surface water allocation announcements – urban water system

Supporting information
Quantification approach

Supporting information

a. Overall

The volumetric value for the line item at the end of the 2012–13 year was 442,826 ML.

This line item consists of surface water allocation announcements for entitlements held by urban utilities including Gold Coast water resource plan (WRP) area, Logan Basin WRP area, and Moreton WRP area.

The following table shows allocation announcements by water supply scheme (WSS) and WRP area held by urban utilities. All allocation announcements were 100% in the 2012–13 year.

Urban allocation announcements
Water resource plan (WRP) area	Water supply scheme (WSS)	Water resource plan priority group								Total (ML)
		High class A or High	High distribution loss	High A	High B	Medium	Medium distribution loss	Risk A	Risk A and B
		(ML)	(ML)	(ML)	(ML)	(ML)	(ML)	(ML)	(ML)
Gold Coast	Nerang	83,995	0	0	0	0	0	0	0	83,995
Gold Coast	Total Gold Coast WRP area	83,995	0	0	0	0	0	0	0	83,995
Logan Basin	Logan River	8,910	0	0	0	0	0	0	0	8,910
Logan Basin	Total Logan Basin WRP area	8,910	0	0	0	0	0	0	0	8,910
Moreton	Central Brisbane River and Stanley River	278,725	0	0	0	0	0	0	0	278,725
	Central Lockyer	0	0	0	0	0	0	0	0	0
	Cressbrook Creek	10,000	0	0	0	0	0	0	0	10,000
	Lower Lockyer Valley	0	0	0	0	0	0	0	0	0
	Pine Valleys	59,000	0	0	0	0	0	0	0	59,000
	Warrill Valley	0	0	890	1,306	0	0	0	0	2,196
	Total Moreton WRP area	347,725	0	890	1,306	0	0	0	0	349,921
Total South East Queensland region		440,630	0	890	1,306	0	0	0	0	442,826

Table Note:

1. There was no change in data from 2011–12 because announced allocation was the same i.e. 100%.

b. Urban surface water allocation remaining – reconciliation

The following table shows the urban surface water allocation reconciliation (line item 3.7 Urban claim on surface water is equivalent to line item 5.2 Surface water allocation remaining – urban water system). Allocation diversion was higher in 2013 than in the previous year and combined with the 100% allocation announcements; this has resulted in slightly lower forfeiture of urban surface water allocation (approximately 50% of announcement) than that reported for the 2012 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.

Urban surface water allocation reconciliation
Water resource plan (WRP) area	Water supply scheme (WSS)	Line item 5.2	Line item 21.2	Line item 17.12	Line item 13.2	Line item 5.2
		Opening balance	Announcement (ML)	Allocation diversion	Adjustment and forfeiture (ML)	Closing balance (ML)
		(ML)	Announcement (ML)	(ML)	Adjustment and forfeiture (ML)	Closing balance (ML)
Gold Coast	Nerang	0	83,995	61,953	22,042	0
Gold Coast	Total Gold Coast WRP area	0	83,995	61,953	22,042	0
Logan Basin	Logan River	0	8,910	1,271	7,639	0
Logan Basin	Total Logan Basin WRP area	0	8,910	1,271	7,639	0
Moreton	Central Brisbane River and Stanley River	0	278,725	123,603	155,122	0
	Central Lockyer	0	0	0	0	0
	CressbrookCreek¹	0	10,000	172	9,828	0
	Lower Lockyer Valley	0	0	0	0	0
	Pine Valleys	0	59,000	33,546	25,454	0
	Warrill Valley	0	2,196	518	1,678	0
	Total Moreton WRP area	0	349,921	157,839	192,082	0
Total South East Queensland (SEQ) region		0	442,826	221,063	221,763	0

¹The draw from Cressbrook and Perseverance dams (6,508 ML) is the actual diversion from the surface water allocation for Cressbrook (10,000 ML) of which the Crow's Nest's diversion (172 ML) stays within the SEQ water supply region. This draw does not include Yarraman take (88 ML) from Cooyar Creek.

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 2013 Account, the urban claim on surface water only includes the Seqwater 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 (Department of Natural Resources and Mines 2013b, 2013c, 2013d) schedule of water allocations listed for the Seqwater and Toowoomba Regional Council.

Quantification approach

Data source

Seqwater: volumes of entitlement from resource operations plans for Gold Coast, Logan Basin, and Moreton.

Provided by

Seqwater.

Method

Urban holder entitlements were defined as high-priority group supplemented entitlements held by the Seqwater or Toowoomba Regional Council.

The volumes of entitlement were obtained from the Moreton, Logan Basin, and Gold Coast resource operations plans (ROPs) schedule of water allocations (Queensland supplemented water allocations are equivalent to regulated entitlements of the 2012 Account).

Announced allocation of 100% was given for all urban utility's entitlements for the 2012–13 year, making the allocation announcements equal to the nominal entitlement volume.

Assumptions, limitations, caveats and approximations

Other organisations may hold supplemented entitlements for some form of urban use, but, as urban use is not identified on entitlements, these could not readily be identified.

Uncertainty information

The uncertainty estimate was not quantified.

South East Queensland21.2 Surface water allocation announcements – urban water system