Murray–Darling Basin

8.1.2.7 Allocation on regulated flows remaining – high-security, other lumped holders

Supporting information

The volumetric value for the line item at the end of 2009–10 is 20,169 ML. The following table provides a breakdown of the volumes.

Allocation remaining within the Murray–Darling Basin (MDB) region – high-security, other lumped holders
Region no.	Region name	State	Volume as at 30 June 2009 (ML)	Volume as at 30 June 2010 (ML)
5	Border Rivers	Qld/NSW	0	0
5.1	Border Rivers – Qld	Qld	n/a	n/a
5.2	Border Rivers – NSW	NSW	0	0
6	Gwydir	NSW	0	0
7	Namoi	NSW	0	0
8	Macquarie–Castlereagh	NSW	0	0
10	Lower Darling	NSW	607	417
11	Lachlan	NSW	0	0
12	Wimmera–Avoca	Vic	–	–
13	Ovens	Vic	n/a	n/a
14	Goulburn–Broken	Vic	–	–
15	Loddon	Vic	–	–
16	Campaspe	Vic	–	–
17	Murrumbidgee	NSW/ACT	0	0
17.1	Murrumbidgee – NSW	NSW	0	0
17.2	Murrumbidgee – ACT	ACT	n/a	n/a
18	Murray	NSW/Vic/SA	20,358	19,752
18.1	Murray – NSW	NSW	20,358	19,752
18.2	Murray – Vic	Vic	–	–
18.3	Murray – SA	SA	n/a	n/a
	Total		20,965	20,169

– = no data available; n/a = not applicable

Allocations remaining for several New South Wales regions were negative volumes because of advance drawing. Allocations remaining for these regions are reported as zero for this line item; advance-drawing volumes are reported in Line item 7.6.

New South Wales volumes shown in the table include the licence class of high-security allocation remaining:

for bulk and individual irrigation
for environment
where the purpose is generally not known.

Although some New South Wales water sharing plans remain suspended, there has been provision to carryover high-security class allocation remaining water in the Lower Darling and Murray regions.

No information specific to this entitlement class available for Victoria. See Line item 8.1.9.7 Allocation on regulated flows remaining – other lumped holders for data on all classes lumped together.

In Queensland, the resource operation plans (ROPs) distinguish between ‘high and medium priority of supplemented water allocation’ (names used in Queensland, corresponding to high and general/low-security classes of water access entitlements, respectively, in the National Water Account 2010, or the 2010 Account). In most cases, what the ROPs classify as high priority actually corresponds to urban purpose. The water audit monitoring (WAM) data, however, only distinguish between ‘supplemented’ and ‘unsupplemented’ entitlements, distinguishing for ‘supplemented’ only, urban purpose from all other purposes. For this reason, the 2010 Account reports all ‘supplemented’ entitlements in Queensland under ‘other lumped WAE’ class. The 2010 Account further splits Queensland ‘supplemented’ entitlements between urban purpose, reported under ‘urban holder’ (Line item 8.1.9.4), and all other purposes, reported under ‘individual irrigator holder’ (Line item 8.1.9.2) and ‘other lumped holders’ (Line item 8.1.9.7).

No other state has high or general/low-security classes of entitlements.

Quantification approach

Data source

Australian Capital Territory: Water Audit Monitoring Report 2009–10 (30 November 2010).

New South Wales: NSW Office of Water’s Water Accounting section.

Queensland: Water Audit Monitoring Report 2009–10 (31 January 2011).

South Australia: Water Audit Monitoring Report 2009–10 (22 February 2011).

Victoria: Water Audit Monitoring Report 2009–10 (19 January 2011).

Note: Water audit monitoring report (WAM) data are stored in the Murray–Darling Basin Authority (MDBA) HYDRO database.

Data provider

MDBA.

Method

Water sharing plans, water resource plans and the water legislation of each state specify:

the classes of licences that are permitted to carry forward any unused volumes
rules attached to the volume that may be carried forward.

Allocation remaining (carryover) is calculated by the states and provided to the MDBA.

Uncertainty

The uncertainty estimate for the values provided in the line item is +/–10%.

Approximations, assumptions, caveats/limitations

The Victorian and Queensland WAM data received by MDBA did not allow separation into high and general/low-security classes; therefore, this item contains only New South Wales data.