Murray–Darling Basin

14.7.9.7 Allocation diversion of regulated flows – other lumped holders

Supporting information

The volumetric value for the line item is 2,287,387 ML (see the following table for the breakdown.

Allocation diversion of regulated flows made under other lumped holder category for the Murray–Darling Basin (MDB) region in 2009–10
Region no.	Region name	State	Volume (ML)	Uncertainty
11	Lachlan	NSW	0	10%
12	Wimmera–Avoca	Vic	9,021	5%
13	Ovens¹	Vic	7,655	10%
14	Goulburn–Broken¹	Vic	806,097	5%
15	Loddon¹	Vic	2,731	5%
16	Campaspe¹	Vic	7,780	5%
17	Murrumbidgee	NSW/ACT	450	10%
17.1	Murrumbidgee – NSW	NSW	450	10%
17.2	Murrumbidgee – ACT	ACT	n/a	n/a
18	Murray	NSW/SA/Vic	1,453,653	–
18.1	Murray – NSW	NSW	0	10%
18.2	Murray – Vic¹	Vic	985,427	7% to 14%
18.3	Murray – SA²	SA	468,226	5% to 6%
	Total		2,287,387

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

1 Refer to the following table for calculation details

2 Refer to the table next to the following table for calculation details

Victorian data include the regulated system allocation diversions within each region. It was not possible to separate diversions for different purposes such as urban, irrigation and environment, or between high-reliability and low-reliability classes of licence.

Victorian allocation diversions are shown in the source valley, even though the water was taken in a different destination valley. Therefore all entitlements in the Goulburn–Broken region have their diversions shown in the Goulburn–Broken region, rather than the destination valleys of the Loddon or the Campaspe, or transferred to Melbourne.

Victorian volumes included within the Goulburn–Broken allocation diversions is 16,417 ML, which has been transferred to Melbourne.

Other Victorian diversions such as urban bulk entitlements in the unregulated system are shown in Line item 14.6.2 Diversion of unregulated flows – urban water access entitlements and take for irrigator purposes in the unregulated system is shown in Line item 14.6.5.2 Allocation diversion of unregulated flows – individual irrigator holder.

Calculation of allocation diversions within the region – Victoria
Region	WAM volume (ML)	Volumes transferred from other regions (ML)	Environmental diversions	Total unregulated diversion	Total
Ovens	12,613	0	0	–4,958	7,655
Goulburn – Broken	799,435	18,031	3,200	–14,570	806,097
Loddon	4,211	0	0	–1,480	2,731
Campaspe	26,089	–18,031	0	–278	7,780
Murray – Vic	957,955	0	33,768	–6,296	985,427

Note: Values for which minus signs are provided are deducted when calculating the total value.

South Australian data include total allocation diversions for all other purposes (including high security environmental purposes and individual irrigation holders) other than urban and stock and domestic use.

Calculation of allocation diversions within the region – South Australia
Region	Total non-swamp irrigation diversion (ML)	Total reclaimed swamp irrigation diversion (ML)	Total environmental water for SA diversion (ML)	Planned environmental water diversion (ML)	Total (ML)
Murray – SA	371,405	14,300	132,563	–50,042	468,226

Note: Values for which minus signs are provided are deducted when calculating the total value.

Information on carryover volumes, allocation, delivery and forfeiture on high-security environmental purposes and individual irrigation holders for South Australia is not separately provided in the accounting reports due to data compilation difficulties.

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 (WAM) report data are stored in the Murray–Darling Basin Authority (MDBA) HYDRO database.

Data provider

MDBA.

Method

WAM-supplied data are either measured, modelled or estimated
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.

Uncertainty

See the above table entitled ‘ Allocation diversion of regulated flows made under other lumped holder category for the Murray–Darling Basin (MDB) region in 2009–10’ for the uncertainty estimates.

Approximations, assumptions, caveats/limitations

For South Australia, it was not possible to separate allocation remaining for different purposes such as irrigation, industrial and recreation. Therefore, allocation remaining was treated as ‘other lumped holder’. All other remaining line items were treated in the same manner to enable reconciliation of the line item and ensure consistency of treatment. Data were available to separate irrigation and environment for allocation announcement and allocation diversion.
For Victoria, it was not possible to separate allocation remaining for different purposes such as urban, irrigation and environment, or between high-reliability and low-reliability licence classes. Therefore, allocation remaining was treated as ‘other lumped holder’. All other remaining line items were treated in the same manner to enable reconciliation of the line item and ensure consistency of treatment. Data were available to separate urban, irrigation and environment, and between high-reliability and low-reliability classes of licence for allocation announcement, allocation diversion, and allocation adjustment and forfeiture.