Murray–Darling Basin

26.1.9.4 Adjustment and forfeiture of allocation on regulated flows – urban holder

Supporting information

The volumetric value for the line item is 4,679 ML. The following table provides a breakdown of the volume.

Adjustment and forfeiture of allocation on regulated flows for urban holder category in the Murray–Darling Basin for 2009–10
Region no.	Region name	State	Volume (ML)
2	Warrego	Qld/NSW	58
2.1	Warrego – Qld	Qld	58
2.2	Warrego – NSW	NSW	n/a
3	Condamine–Balonne	Qld/NSW	4,629
3.1	Condamine–Balonne – Qld	Qld	4,629
3.2	Condamine–Balonne – NSW	NSW	n/a
5	Border Rivers	Qld/NSW	–8
5.1	Border Rivers – Qld	Qld	–8
5.2	Border Rivers – NSW	NSW	n/a
	Total		4,679

n/a = not applicable

Supplemented regions within Queensland do not provide for carryover for urban holder. Therefore, the allocation adjustment and forfeiture has been calculated as the difference between the allocation announcement and the allocation diversion. See the following table for further details.

Region	State	Allocation announced (ML)	Allocation diversion (ML)	Allocation adjustment and forfeiture (ML)
Warrego	Qld	80	22	58
Condamine–Balonne	Qld	6,300	1,671	4,629
Border Rivers	Qld	3,330	3,338	–8
Total		9,710	5,031	4,679

Within the Border Rivers region of Queensland, the allocation diversion exceeded the allocation announced. This implies there was use greater than the allocation (it is likely that diversions made under unsupplemented water allocations and water licences may also be included). The allocation adjustment and forfeiture is therefore shown as a negative volume, writing off the ‘over-use’.

Quantification approach

Data source

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

New South Wales: New South Wales 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

In Queensland allocation remaining is not available in the supplemented systems for urban holders and therefore all allocation remaining at the end of the year is forfeited. Allocation adjustment and forfeiture is the balance after deducting the allocation diversion from the allocation announcement.

Uncertainty

WAM-sourced data does not have any uncertainty information on allocation adjustment and forfeiture. The estimated uncertainty is ungraded.

Approximations, assumptions, caveats/limitations

Nil.

National Water Account 2010