13.1 Adjustment and forfeiture of surface water allocation
The volumetric value for the line item for the 2011–12 year was 2,176,027 ML. The line item does not include details for urban water systems. They are included in line item 13.2 'Adjustment and forfeiture of surface water allocation – urban water system'.
Adjustment and forfeiture of surface water allocation
The following two tables provide a summary and breakdown information on adjustment and forfeiture of surface water allocation (excluding urban water systems) within the region.
|Surface water resource plan area||State/Territory||Volume (ML) for the 2011–12 year|
|SW16||Qld Border Rivers||Qld||74646|
|SW15||NSW Border Rivers||NSW||8,787|
|SW12||NSW Intersecting Streams||NSW||n/a|
|Sub-total Northern Basin||165,143|
|SW7||NSW Murray and Lower Darling||NSW||206,304|
|SW6||Eastern Mount Lofty Ranges||SA||–|
|Sub-total Southern Basin||2,010,884|
|Total for the region||2,176,027|
– = Data not available
|Water resource plan area||
Sustainable diversion limit (SDL) area
Volume (ML) for the 2011–12 year
|SW16 Qld Border Rivers||SS24||Qld Border Rivers||Qld||Supplemented||74,646|
|SW15 NSW Border Rivers||SS23||NSW Border Rivers||NSW||High security||427|
|Stock and domestic||577|
|SW14 Gwydir||SS22||Gwydir||NSW||High security||8,918|
|Stock and domestic||2,264|
|High security – research||60|
|SW13 Namoi||SS21||Namoi||NSW||High security||804|
|Stock and domestic||1,748|
|High security – research||3|
|SW10 Macquarie–Castlereagh||SS20||Macquarie–Castlereagh||NSW||High security||6,929|
|Stock and domestic||4,273|
|High security – research||3,389|
|SW9 Lachlan||SS16||Lachlan||NSW||High security||12,107|
|Stock and domestic||11,567|
|SW8 Murrumbidgee NSW||SS15||Murrumbidgee NSW||NSW||High security||10,023|
|Stock and domestic||12,289|
|High security – research||2|
|High security – Aboriginal cultural||1,489|
|SW7 NSW Murray and Lower Darling||SS18||Lower Darling||NSW||High security||1,351|
|Stock and domestic||811|
|SS14||NSW Murray||NSW||High security||56,590|
|Stock and domestic||7,505|
|High security – research||800|
|High security – Aboriginal cultural||0|
|High security – Community & education||22|
|Sub-total New South Wales||1,228,005|
|SW3 Northern Victoria||SS4||Ovens||Vic.||High reliability water share||19,595|
|SS5||Broken||Vic.||Combined high and low reliability||5,708|
|SS6||Goulburn||Vic.||Combined high and low reliability||182,032|
|SS7||Campaspe||Vic.||Combined high and low reliability||63,440|
|SS8||Loddon||Vic.||Combined high and low reliability||7,794|
|SW2 Vic Murray||SS2||Vic. Murray||Vic.||Combined high and low reliability||–65,469|
|SW4 Wimmera–Mallee||SS9||Wimmera–Mallee||Vic.||High reliability water share||49,553|
|SW6 Eastern Mount Lofty Ranges||SS13||Eastern Mount Lofty Ranges||SA||Regulated||
|SW5 SA Murray||SS11||SA Murray||SA||Class 1 – Stock and domestic||
|Class 3 – Irrigation and holding||
|Class 4 – Recreation||
|Class 5 – Industrial||
|Class 7 – Environment||
|Class 8 – Environmental land management||
|Combined classes metered||605,011|
|Combined classes unmetered||
|SS10||SA Non-prescribed areas||SA||Regulated||
|SW6 Eastern Mount Lofty Ranges||SS12||Marne Saunders||SA||Regulated||
| Sub-total South Australia
|Total for the region||2,176,027|
– = Data not available
Adjustment and forfeiture volumes provided in this line item include environmental water adjustment and forfeiture volumes.
In Queensland, the resource operation plans (ROPs) distinguish between 'high and medium priority of supplemented water allocation'. The water audit monitoring (WAM) data which are the data source for the 2012 Account only distinguishes between 'supplemented' and 'unsupplemented' entitlements. Both urban and non-urban supplemented entitlements are included within the supplemented entitlement class. Supplemented urban and supplemented non-urban volumes on allocations, diversions and other attributes were received together and not possible to be separated out for the two purposes. Therefore, this line item includes adjustment and forfeiture volumes for both urban and non-urban supplemented entitlements.
For continuous accounting systems in Condamine–Balonne and Border Rivers, it was not possible to calculate the adjustment and forfeiture volumes due to lack of information.
New South Wales
Usually unused allocation balances are forfeited for entitlement classes: stock and domestic, community and education, and research and Aboriginal culture. In some cases, the allocation may be overdrawn and the balance is shown in line item 5.1 'Surface water allocation remaining'.
In the Murrumbidgee WRP area, irrigators may 'borrow' water from the Snowy Scheme. This borrow is made under a contractual agreement between the irrigator and the Snowy Scheme. The volume contracted is then credited by New South Wales Office of Water (NOW) to the individual account of the irrigator, allowing the irrigator to order water from the water assets administered by NOW. In parallel, the Snowy Scheme transfers the physical water into Blowering Reservoir in the Murrumbidgee WRP area. When the irrigator is able in subsequent years to repay the debt, they notify NOW, which debits the account from the volume previously borrowed, thus reducing the allocation announced earlier in the year. Line item 1.5 'Inter-region claim on water' provides details of the inter-region transfers from Snowy Hydro.
Victorian allocation adjustment and forfeiture are shown in the source valley, even though the water was taken in a different destination valley. Therefore all entitlements in the Goulburn SDL area have their allocation adjustments and forfeiture shown in that area, rather than the destination valleys of the Loddon or the Campaspe.
In Victoria, once an allocation has been made, regardless of its class, it goes into a single allocation account. Therefore, adjustment and forfeiture volumes are not specified as high reliability water share or a low reliability water share and are reported as combined high and low reliability water share.
More details on Victorian adjustment and forfeiture volumes are provided in the following table.
|Sustainable diversion limit (SDL) area||
Total forfeiture at end of the 2011–12 year (ML)
Environmental forfeiture volume included in the total forfeiture volume (ML)
No carry-over was permitted for South Australian Murray at the end of the 2011–12 year. In this line item for South Australia, adjustment and forfeiture volumes include the classes 3, 4, 7 and 9 as a 'combined class'. Carry-over is not allowed for classes 1, 5 and 8, and therefore all unused water within these classes is forfeited.
(1) New South Wales Office of Water: water accounting section; and (2) Murray–Darling Basin Authority: water audit monitoring (WAM) data received from Queensland (4 February 2013), South Australia (15 March 2013) and Victoria (21 March 2013), and stored in the HYDRO database.
Bureau of Meteorology (the Bureau).
- The New South Wales Office of Water supplied data prepared on a water balance approach. The forfeitures and adjustments have been checked to ensure that the closing balance reconciles.
- Adjustment and forfeiture for Queensland was calculated using WAM data on a water balance approach. The forfeitures and adjustments have been checked to ensure that the closing balance reconciles. Adjustment and forfeiture does not apply in the St George (Condamine–Balonne SDL area), Border Rivers and Macintyre Brook (Queensland Border Rivers SDL area) water supply schemes which are continuous share schemes
- Adjustment and forfeiture for South Australia was calculated using WAM data on a water balance approach. The forfeitures and adjustments have been checked to ensure that the closing balance reconciles.
- Victorian adjustment and forfeiture was calculated applying a water balance approach to WAM data..
Assumptions, limitations, caveats and approximations
- Uncertainty reported by New South Wales Office of Water accounts for possible errors in the quantification of diversion and in the data handling processes.
- Information provided in this line item may have been based on Cap valleys in the HYDRO database, which may not align perfectly with SDL areas.
Availability of updated information resulted in the restatement of the 2010–11 year volume. The respective volumes associated with the change are detailed in the following table.
|Segment||2012 Account volume for the 2010–11 year (ML)||2011 Account volume for the 2010–11 year (ML)||Difference due to availability of updated information (ML)|
Values reported in the 2011 Account were updated due to the following reasons:
- Values for several entitlement classes were updated for the New South Wales and Victorian SDL areas. These updates were based on reconciling accounting/licensing anomalies in entitlement holder licence accounts.