17.12 Surface water allocation diversion - urban water system
The volumetric value for the line item for the 2010–11 year was 267,384 ML. The line item represents surface water allocation diversions in urban water systems associated with a number of entitlement classes in the Murray–Darling Basin (MDB) region.
The following two tables provide a summary and breakdown information on surface water allocation diversions in urban water systems within the region.
|Water resource plan area||
|SW19||Warrego – Paroo – Nebine||Qld||0|
|SW16||Qld Border Rivers||Qld||0|
|SW15||NSW Border Rivers||NSW||398|
|SW12||NSW Intersecting Streams||NSW||na|
|Sub-total Northern Basin||15,509|
|SW7||NSW Murray and Lower Darling||NSW||20,591|
|SW6||Eastern Mount Lofty Ranges||SA||na|
|Sub-total Southern Basin||251,875|
|Total for the region||267,384|
na = not applicable
|Water resource plan area||
Sustainable diversion limit area
|NSW Border Rivers||SS23||NSW Border Rivers||NSW||Local water utility||398|
|Local water utility||2,084|
|Namoi||SS21||Namoi||NSW||Local water utility||4,066|
|Macquarie–Castlereagh||SS20||Macquarie–Castlereagh||NSW||Local water utility||8,961|
|High security – town water supply||0|
|Lachlan||SS16||Lachlan||NSW||Local water utility||4,359|
|Murrumbidgee NSW||SS15||Murrumbidgee NSW||NSW||Local water utility||8,006|
|High security – town water supply||19,769|
|NSW Murray and Lower Darling||SS18||Lower Darling||NSW||Local water utility||961|
|SS14||NSW Murray||NSW||Local water utility||16,460|
|High security – town water supply||3,170|
|Sub-total New South Wales||68,234|
|Northern Victoria||SS4||Ovens||Vic||Urban – regulated||3,153|
|SS5||Broken||Vic||Urban – regulated||1,142|
|SS6||Goulburn||Vic||Urban – regulated||19,921|
|SS7||Campaspe||Vic||Urban – regulated||9,521|
|SS8||Loddon||Vic||Urban – regulated||599|
|Vic Murray||SS2||Vic Murray||Vic||Urban||33,270|
|SA Murray||SS11||SA Murray||SA||Class 2 – other urban (country town) water supply||34,164|
|Class 6 – Metro-Adelaide water supply scheme||56,436|
|Combined classes urban||0|
|Sub-total South Australia||90,600|
|ACT||SS1||ACT||ACT||Urban – regulated||40,944|
|Total for the region||267,384|
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 2011 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 not possible to be separated out for two purposes. Therefore, surface water allocation diversions for both urban and non-urban supplemented entitlements are included in line item 17.11 Surface water allocation diversion.
Toowoomba regional council has entitlements within the Moreton Water Resource Plan area that is within the South East Queensland region. Toowoomba regional council receives water from Perseverance, Cressbrook and Wivenhoe storages (through Cressbrook Reservoir) for urban purposes within the MDB region. This water supplements the Toowoomba regional council's diversions within the MDB region. This transfer arrangement delivers water directly into the Toowoomba regional council's distribution network, which is excluded from the MDB region. The transferred volume, 2,396 ML, for the year 2010–11 from Cressbrook and Perseverance storages is therefore not reported in the water accounting statements for the MDB region.
New South Wales
New South Wales volumes for this line item contain the diversions made under major and local water utility classes as well as the high security town water supply class.
Victorian volumes included within the Goulburn allocation diversions is 7,476 ML, which has been transferred to Melbourne via the Killingworth Pump (North–South Pipeline) and 73 ML transferred from Goulburn system via the Goldfields Superpipe to Ballart.
South Australian urban diversions include the Metro-Adelaide and the South Australian country town allocation diversions. The diversions to Metro-Adelaide are part of the River Murray entitlements and are pumped from within the MDB region to Adelaide.
Australian Capital Territory
The line item includes regulated diversions made from the Murrumbidgee River for urban purposes.
The NSW 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.
The other data supplied for this line item result from an estimate based on user meter readings.
Assumptions, Limitations, Caveats and Approximations
Uncertainty reported for diversion at the abstraction point account for possible errors in the data collection process.
The estimates of accuracy of the diversion are indicative of the accuracy of diversions at the abstraction point on the river only.
|10||Estimate based on user meter readings|
|20||Detailed estimate based on regional surveys|
|40||Estimate based on user returns|
The following table outlines the WAM uncertainty percentage for each entitlement class for each jurisdiction.
|SA||Class 2 and Class 6||
|NSW||Combined NSW regulated data reliability||
This line item corresponds to line items listed in the following table and reported in the 2010 Account. In the 2011 Account, the following change was made that caused the 2009–10 year value to be restated:
Presentation and classification of the line items has changed since the 2010 Account: line items have been regrouped.
The changes and their respective values are detailed in the following table.
Northern Basin (ML)
Southern Basin (ML)
Whole region (ML)
|Line item names and values reported as at the 2009–10 year in the 2010 Account||126.96.36.199 Allocation diversion of regulated flows – high security, urban holder||1,511||117,478||118,989|
|14.7.4 Allocation/claim diversion of regulated flows – urban water access entitlement/arrangement||21,261||77,365||98,626|
|188.8.131.52 Allocation diversion of regulated flows – urban holder||5,031||0||5,031|
|Total value reported for the 2010 Account||27,803||194,843||222,646|
|Changes in the value reported in the 2010 Account due to regrouping of line items||–1511||84,131||82,620|
|Value reported for the 2009–10 year in the 2011 Account||26,292||278,974||305,266|
Changes in the value reported in the 2010 Account due to regrouping of line items were due to the following reasons:
The high security entitlement classes within New South Wales for research, industrial, cultural, community and education were reported under urban line items in the 2010 Account. Diversions associated with these entitlement classes were designated as non-urban and excluded from this line item for the 2011 Account.
In the 2010 Account, Victorian allocation diversion volumes were not separated into urban and non-urban and reported under line item 184.108.40.206 Allocation diversion of regulated flows – other lumped holders. For the 2011 Account, these volumes were restated after separating into urban and non-urban entitlement classes.