21.1 Surface water allocation announcements
The volumetric value for the line item for the 2011–12 year was 9,011,661 ML. The line item includes following allocation volumes in the Murray–Darling Basin (MDB) region:
- surface water allocation announcements (excluding urban water systems) associated with a number of entitlement classes (8,997,521 ML)
- net volume 14,140 ML, of allocation trade received (details are after the following two tables).
Information on surface water allocation announcements for urban water systems is included in line item 21.2 'Surface water allocation announcements – urban water system'.
Following two tables provide a summary and breakdown information on surface water allocation announcements (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||101958|
|SW15||NSW Border Rivers||NSW||108,122|
|SW12||NSW Intersecting Streams||NSW||n/a|
|Sub-total Northern Basin||1,599,486|
|SW7||NSW Murray and Lower Darling||NSW||1,230,199|
|SW6||Eastern Mount Lofty Ranges||SA||–|
|Sub-total Southern Basin||
|Total for the region||
– = 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||101,958|
|SW15 NSW Border Rivers||SS23||NSW Border Rivers||NSW||High security||1,500|
|Stock and domestic||1,002|
|SW14 Gwydir||SS22||Gwydir||NSW||High security||14,818|
|Stock and domestic||2,744|
|High security – research||60|
|SW13 Namoi||SS21||Namoi||NSW||High security||4,299|
|Stock and domestic||2,289|
|High security – research||489|
|SW10 Macquarie–Castlereagh||SS20||Macquarie–Castlereagh||NSW||High security||19,272|
|Stock and domestic||5,589|
|High security – research||4,345|
|SW9 Lachlan||SS16||Lachlan||NSW||High security||30,905|
|Stock and domestic||14,307|
|SW8 Murrumbidgee NSW||SS15||Murrumbidgee NSW||NSW||High security||356,846|
|Stock and domestic||35,942|
|High security – research||300|
|High security – Aboriginal cultural||1,853|
|SW7 NSW Murray and Lower Darling||SS18||Lower Darling||NSW||High security||7,633|
|Stock and domestic||1,375|
|SS14||NSW Murray||NSW||High security||102,514|
|Stock and domestic||17,183|
|High security – research||0|
|High security – Aboriginal cultural||0|
|High security – community & education||12|
|Sub-total New South Wales||5,570,812|
|SW3 Northern Victoria||SS4||Ovens||Vic.||High reliability water share||22,477|
|SS5||Broken||Vic.||Combined high and low reliability||11,130|
|SS6||Goulburn||Vic.||Combined high and low reliability||1,085,354|
|SS7||Campaspe||Vic.||Combined high and low reliability||60,748|
|SS8||Loddon||Vic.||Combined high and low reliability||9,202|
|SW2 Vic Murray||SS2||Vic. Murray||Vic.||Combined high and low reliability||1,299,447|
|SW4 Wimmera–Mallee||SS9||Wimmera–Mallee||Vic.||High reliability water share||75,820|
|SW6 Eastern Mount Lofty Ranges||SS13||Eastern Mount Lofty Ranges||SA||Regulated||–|
|SW2 SA Murray||SS11||SA Murray||SA||Class 1 – stock and domestic||8,351|
|Class 3 – irrigation and holding||564,773|
|Class 4 – recreation||4,424|
|Class 5 – industrial||5,520|
|Class 7 – environment||38,367|
|Class 8 – environmental land management||21,545|
|Combined classes metered||0|
|Combined classes unmetered||0|
|SS10||SA Non-prescribed Areas||SA||Regulated||–|
|SW6 Eastern Mount Lofty Ranges||SS12||Marne Saunders||SA||Regulated||–|
|Sub-total South Australia||642,980|
|Total for the region||8,997,521|
– = Data not available
Environmental water allocation
Allocation volumes provided in above two tables include environmental water allocations as reported by the states.
The following table reconciles carry-over, allocation announcements, allocation diversion, allocation trade and allocation forfeiture for the jurisdictions within the MDB region for the 2011–12 year. All allocation related non-urban and urban line items have been considered in the reconciliation.
|Jurisdiction||A = Line items 5.1 and 5.2 opening volume (allocation carry-over, ML)||B = Line items 21.1 and 21.2 (allocation announcements, ML)||C = Line items 17.11 and 17.12 (allocation diversion, ML)||D = Line items 13.1 and 13.2 (forfeiture, ML)||E = Line item 37.1 (temporary water trade inward, ML)||F = Line item 37.1 (temporary water trade outward, ML)||G = Line items 5.1 and 5.2 closing volume (allocation carry-over, ML)||A+B+E-C-D-F-G (ML)|
|New South Wales||3,901,622||5,718,371||3,876,430||1,310,530||2,158,729||2,230,966||4,360,796||0|
|Australian Capital Territory||0||70,000||41,790||28,210||0||0||0||0|
The table shows allocations for all the jurisdictions were reconciled with no unaccounted volumes when allocation-related both non-urban and urban line items had been considered and allocation trades had been taken into account.
When only non-urban line items were considered, it was not possible to consider allocation trade in the reconciliation process because:
- allocation trade has not yet been included as input variable in the current accounting process
- details of allocation trade between non-urban and urban entitlement l classes were not available.
Reconciliation of non-urban line items (5.1, 13.1, 17.11 and 21.1) excluding allocation trades shows unaccounted volume of 14,140 ML. This unaccounted volume has been due to exclusion of allocation trade in the reconciliation. Reconciliation of urban line items (5.2, 13.2, 17.12 and 21.2) has resulted in the same unaccounted volume. Therefore, allocation announcements (line items 21.1 and 21.2) have been revised as shown in the following table to accommodate change in water availability as a result of net allocation trade.
Line item 21.1
Line item 21.2
Both line items 21.1 and 21.2
|Estimated from received data (ML)||Revised volume accommodating temporary water trade to reconcile allocation-related line items (ML)||Difference between estimated and revised volumes (ML)||Estimated from received data (ML)||Revised to reconcile allocation-related line items (ML)||Difference between estimated and revised volumes (ML)||Estimated from received data (ML)||Revised to reconcile allocation-related line items (ML)||Difference between estimated and revised volumes (ML)|
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 distinguish between supplemented and unsupplemented entitlements. Both urban and non-urban supplemented entitlements are included within supplemented entitlement class. Supplemented urban and supplemented non-urban volumes on allocations, diversions and other attributes were received together and it was not possible for these to be separated out for two purposes. Therefore, this line item includes surface water allocation announcements for both urban and non-urban supplemented entitlements.
Water supply system associated with Beardmore storage in Condamine–Balonne SDL area is predominantly a capacity share scheme and doesn't have an annual announced allocation. Announced allocation is calculated on use plus available water remaining at the end of the water year.
For Queensland Border Rivers SDL area, allocation announcement includes both the allocation announcement during the year and the remaining water available at the end of the previous year. No information was available to separate the water available at the end of the previous year from the allocation announced during the year.
The Border Rivers water supply scheme within Queensland Border Rivers SDL area is a continuous accounting scheme and doesn't have an annual announced allocation. Announced allocation is calculated on use plus available water remaining at the end of the water year; however, a part of Macintyre Brook scheme is subject to announced allocation but it is gradually moving to continuous accounting.
New South Wales
In calculating allocation announcements, impacts of implementing new water sharing plans and abolishing existing plans have been taken into account.
Water availability related to allocation announcements took into account impact of reservoir spilling.
Water use for cultural, industrial, research, community and education activities have been categorised as non-urban. Therefore, related allocation announcements have been included in this line item.
The volume for Murrumbidgee NSW includes the allocation announcements associated with river conveyance and bulk irrigation conveyance licences within the Coleambally and Murrumbidgee irrigation areas. These bulk irrigation conveyance licences are held by irrigation corporations to provide for losses within their distribution systems.
Similarly, the volume for Murray NSW includes the allocation announcements associated with river conveyance and bulk irrigation conveyance licences within the Murray irrigation area. This bulk irrigation conveyance licence is held by an irrigation corporation to provide for losses within the distribution system.
The following table provides an allocation reconciliation for Victorian SDL areas.
Carry-over from the 2010–11 year (ML)
Allocation for the 2011–12 year (ML)
Total temporary trade inward (ML)
Total temporary trade outward (ML)
Consumptive use within the 2011–12 year (ML)
Total forfeiture at end of the 2011–12 year (ML)
Estimated carry-over to the 2012–13 year
Victorian allocation announcements are shown in the source valley, even if the water was taken in a different destination valley. Therefore, all entitlements in the Goulburn SDL area have their allocation announcements shown in that area, rather than the destination valleys of the Loddon or the Campaspe.
In this line item, allocation announcements that could not be specified under high reliability water share or a low reliability water share were reported as combined high and low reliability water share.
Victorian allocation volumes provided in this line item include environmental water allocations as shown in the following table.
|SDL area||Total allocation for the 2011–12 year (ML)||Environmental water allocation included in the total allocation (ML)|
(1) New South Wales Office of Water: water accounting section; and (2) Murray–Darling Basin Authority: 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).
- Allocation announcements are usually the entitlements on issue multiplied by the percentage allocation announced.
- Allocation announcement is calculated by the states.
- WAM–supplied data are either measured, modelled or estimated.
- New South Wales Office of Water supplied data are prepared on a water balance approach. It implies that the movement of values during the year will balance the opening and closing balances. The forfeitures and adjustments have been checked to ensure that the closing balance reconciles.
Assumptions, limitations, caveats and approximations
- Uncertainty reported by New South Wales Office of Water includes possible errors in the data handling processes.
- For Queensland, as the allocation announcement includes both the allocation and water available at the end of the previous year, the carry-over value may be understated and the allocation announcement may be overstated.
- 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.
Uncertainty of allocation announcements may in part be due to existing entitlements being converted into a different class, new entitlements issued, or entitlements cancelled following commissioning of a water saving infrastructure project.
The following table shows the WAM uncertainty percentages and the measurement method applied that relates to the reported percentage.
|10||Estimate based on user meter readings|
|20||Detailed estimate based on regional surveys|
|40||Estimate based on user returns|
The table below outlines the WAM uncertainty percentage for each entitlement class for each jurisdiction.
|Jurisdiction||Entitlement class||Uncertainty percentage|
|NSW||All regulated non-urban||10|
|SA||Class 3, Class 4, Class 5, Class 7, Class 8, Class 9 and Combined Class Metered||5|
|SA||Combined classes unmetered||20|
|ACT||All regulated non-urban||5|