South East Queensland
5.1 Surface water allocation remaining

Supporting information

a. Overall

The volumetric value for the line item at the end of the 2011–12 year was 11,578 ML.

This line item represents the claims on the region's surface water held by non-urban entitlement holders at the beginning and end of the 2011–12 year. 

Allocation carryover from one water year to the next does not occur in the South East Queensland (SEQ) region. All unused allocation at the end of a water year is forfeited. 

Where a water supply scheme (WSS) has a water year that does not match the year of 1 July – 30 June, there is potential for claims to be remaining at 30 June as the water year has not concluded. Within the SEQ region, the Lower Lockyer WSS's water year (1 April – 31 March), accordingly any unused allocations remaining at the end of the 2011–12 year are available at the start of the 2012–13 year (1 July 2012).

Lower Lockyer WSS allocation, diversion, allocation remaining and forfeiture from April 2011 to June 2012
Line item

Adjusting activity

Action

Medium priority allocation

Distribution loss allocation (ML)

Total Lower Lockyer WSS allocation

(ML)

(ML)

(previous reporting period) Allocation announcement of 100% at 1 April 2011 (start of water year)  

11,278

1,500

12,778

(previous reporting period) Allocation diversion 1 April 2011 to 30 June 2011 (3 months of diversions) less

169

n/a

169

(previous reporting period) Adjustment at 30 June 2011 (end of the previous reporting year) less

n/a

375

375

5.1 Allocation remaining at 30 June 2011 (opening balance) equals

11,109

1,125

12,234

(part) 17.11 Allocation diversion 1 July 2011 to 31 March 2012 (9 months of diversions) less

3,057

n/a

3,057

(part) 13.1 Adjustment at 31 March 2012 less

n/a

1,125

1,125

(part) 13.1 Forfeiture at 31 March 2012 (end of water year)  less

8,052

n/a

8,052

   Total

0

0

0

(part) 21.1 Allocation announcement at 1 April 2012 (start of the next water year)  

11,278

1,500

12,778

(part) 17.11 Allocation diversion from 1 April 2012 to 30 June 2012 (3 months of diversions) less

825

n/a

825

(part) 13.1 Adjustment at 30 June 2011 (end of the reporting year) less

n/a

375

375

5.1 Allocation remaining at 30 June 2012 (closing balance) Total

10,453

1,125

11,578

 

Notes:

  • The allocation announcement at the start of the water year (1 April 2011) in the Lower Lockyer WSS was 100% and remained 100% for the remainder of the water year. The allocation announcement at the start of the next water year (1 April 2012) was also 100%.
  • Line item 13.1 Adjustment and forfeiture of surface water allocation includes adjustments and forfeiture. As distribution loss allocations are not diverted (as they are in-stream use), all distribution loss allocations are accounted for as adjustments. For more information, refer to line item 13.1 Adjustment and forfeiture of surface water allocation.
  • Where the adjustment or diversion has been listed as n/a, this means that either adjustment or diversion was not applicable for that allocation type. Distribution loss allocations have been considered as adjustments, whereas no adjustments are applicable to the medium priority allocations.

 

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.

 

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

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

Announced allocations for the Lower Lockyer WSS's water year (1 April – 30 March) were obtained from the Seqwater website. Metered quarterly use data were extracted from Department of Natural Resourecs and Mines (DNRM) Water Scheme Operator Report. Any unused allocation remaining at the end of the water year (i.e. 31 March) was forfeited; and there was no carryover of allocation between water years. The allocation remaining at the end of the 2011–12 year (30 June 2012) was calculated by subtracting the first quarter use (1 April – 30 June) from the announced allocation made on 1 April 2012.

Assumptions, limitations, caveats and approximations

It was assumed that all entitlement, allocation and diversion data within the Water Scheme Operator Report were accurate and current at the time of data extraction.

Uncertainty information

The uncertainty was not quantified.