South East Queensland
5.1 Surface water allocation remaining

Supporting Information

a. Overall

This line item represents the claims on the region's surface water held by non-urban entitlement holders at the begining and end of the 2010–11 year.

Allocation carry-over 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 2010–11 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) does not match the 2010–11 year (1 July – 30 June). In this specific case, and for the purpose of the 2011 Account, any unused allocations remaining at the end of the 2010–11 year are available at the start of the 2011–12 year (1 July 2012).

Lower Lockyer Water Supply Scheme allocation, diversion, allocation remaining and forfeiture from April 2010 to June 2011
Line item
Adjusting activity Action Medium priority allocation
(ML)
Distribution loss allocation (ML) Total Lower Lockyer WSS allocation
(ML)
NA (previous reporting period) Allocation announcement of 100% at 1 April 20101 (start of water year)              11,278              1,500               12,778
NA (previous reporting period) Allocation diversion 1 April 2010 to 30 June 2010 (3 months of diversions) less                 727  NA                     727
NA (previous reporting period) Adjustment at 30 June 2010² (end of the previous reporting year) less  NA                  375                    375
5.1 Allocation remaining at 30 June 2010 (opening balance) equals            10,551              1,125               11,676

17.11

Allocation diversion 1 July 2010 to 31 March 2011 (9 months of diversions) less                 747  NA                     747

13.1

Adjustment at 31 March 2011² less  NA               1,125                 1,125

13.1

Forfeiture at 31 March 2011 (end of water year)  less              9,804  NA                  9,804
    equals               0   0 0

21.1

Allocation announcement at 1 April 2011¹ (start of the next water year)              11,278              1,500               12,778

17.11

Allocation diversion from 1 April 2011 to 30 June 2011 (3 months of diversions) less                 169  NA                     169

13.1

Adjustment at 30 June 2011² (end of the reporting year) less  NA                  375                    375
5.1 Allocation remaining at 30 June 2011 (closing balance) equals            11,109              1,125               12,234

Notes:

  1. The allocation announcement at the start of the water year (1 April 2010) 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 2011) was also 100%.

  2. 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.

  3. A line item listed as NA means that the adjusting activity occured in the 2010 Account using different line items. These 2010 Account line item numbers have been omitted from this table to assist with clarity.

  4. Where the adjustment or diversion has been listed as NA, this means that either adjustment or diverison was not applicable for that allocation type. Distribution loss allocations have been considered as adjustments, where as no adjustments were 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. 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

Queensland Department of Environment and Resource Management (DERM), Water Scheme Operator Report.

Provided by

DERM.

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 DERM's 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 carry-over of allocation between water years. The allocation remaining at the end of the 2010–11 year (30 June 2011) was calculated by subtracting the first quarter use (1 April – 30 June) from the announced allocation made on 1 April 2011.

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

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

Comparative year

This line item corresponds to line item 8.1.9.7 Allocation on regulated flows remaining–other lumped holders reported in the 2010 Account.