Murray-Darling Basin
17.8 Non-allocated diversions - urban water system

The volumetric value for the line item for the 2010–11 year was 20,588 ML. The line item represents non-allocated diversions for urban water systems in the Murray–Darling Basin (MDB) region. Non-allocated diversions are made under water access entitlements, for which no present commitment (water liability) to deliver water to users was recognised.

The following tables provide information for the line item in the MDB region on sustainable diversion limit (SDL) area basis.

 

Summary of non-allocated diversions for urban water systems in the MDB region in the 2010–11 year

Surface water resource plan area		State	Volume (ML)
Code	Name
SW19	Warrego – Paroo – Nebine	Qld	44
SW18	Condamine–Balonne	Qld	2,344
SW17	Moonie	Qld	2
SW16	Qld Border Rivers	Qld	777
SW15	NSW Border Rivers	NSW	–
SW11	Barwon–Darling watercourse	NSW	–
SW12	NSW Intersecting Streams	NSW	–
SW14	Gwydir	NSW	na
SW13	Namoi	NSW	na
SW10	Macquarie–Castlereagh	NSW	na
Sub-total Northern Basin			3,167
SW9	Lachlan	NSW	na
SW8	Murrumbidgee NSW	NSW	na
SW7	NSW Murray and Lower Darling	NSW	na
SW3	Northern Victoria	Vic	16,734
SW2	Vic Murray	Vic	687
SW4	Wimmera–Mallee	Vic	na
SW6	Eastern Mount Lofty Ranges	SA	–
SW5	SA Murray	SA	–
SW1	ACT	ACT	na
Sub-total Southern Basin			17,421
Total for the region			20,588

– = Data not available, na = not applicable

 

Details of non-allocated diversions for urban water systems in the MDB region in the 2010–11 year

Surface water resource plan area	SDL area		State	Volume (ML)
	Code	Name
Warrego – Paroo – Nebine	SS29	Paroo	Qld	44
	SS28	Warrego	Qld	0
	SS27	Nebine	Qld	0
Condamine–Balonne	SS26	Condamine–Balonne	Qld	2,344
Moonie	SS25	Moonie	Qld	2
Qld Border Rivers	SS24	Qld Border Rivers	Qld	777
Sub-total Northern Basin				3,167
Vic Murray	SS3	Kiewa	Vic	479
Northern Victoria	SS4	Ovens	Vic	1,513
	SS6	Goulburn	Vic	13,485
	SS7	Campaspe	Vic	175
	SS8	Loddon	Vic	1,561
Vic Murray	SS2	Vic Murray	Vic	208
Sub-total Southern Basin				17,421
Total for the region				20,588

 

Further information for Queensland

Queensland volumes in the previous table were diverted under the unsupplemented entitlement class, in which the purpose of the diversion was known as urban. All unsupplemented diversions for which the purpose was not distinguished (may include urban diversions) in Queensland have been included in volumes shown under line item 17.7 Non-allocated diversions to users.

 

Further information for New South Wales

In New South Wales, no separate information was available in the unregulated system for urban purposes and therefore, all unregulated diversions are shown under line item 17.7 Non-allocated diversions to users.

 

Further information for Victoria

Victorian volume for the Goulburn SDL area includes 11,287 ML that was transferred from the Wallaby and Silver creeks to Melbourne.

Water audit monitoring (WAM) data received from Queensland (22 December 2011) and Victoria (31 January 2012), and stored in the Murray–Darling Basin Authority HYDRO database.

Murray–Darling Basin Authority.

Values are based on metered diversions and estimates. The estimates are based on user meter readings and user returns.

Estimates of uncertainty of the diversions are indicative of the accuracy of bulk diversions at the abstraction point on the river only.

Uncertainty reported for diversion at the abstraction point accounts for possible errors in the data collection process.

A single metered abstraction point may provide water to a range of users under various types of entitlements (e.g. stock and domestic class). When this happens, the jurisdiction may split the metered abstraction into several classes of entitlements or types of users, according to priority rules governing the entitlements. This split has an inherent uncertainty that is not considered here.

The following tables show the WAM uncertainty definitions and the measurement method applied that relates to the reported uncertainty percentage, and the WAM uncertainty percentage for each entitlement class for each jurisdiction. 

 

Uncertainty definitions for WAM data

Uncertainty percentage	Accuracy Description
5	Metered diversions
10	Estimate based on user meter readings
20	Detailed estimate based on regional surveys
40	Estimate based on user returns

 

 

WAM uncertainty percentage for each entitlement class associated with non-allocated urban diversions for each jurisdiction

Jurisdiction	All entitlement classes in following SDL areas	WAM uncertainty (%)
Qld	Condamine–Balonne	5
Qld	Moonie System	5
Qld	Border Rivers	5
Vic	Ovens	18
Vic	Goulburn–Broke	5–10
Vic	Campaspe	40
Vic	Loddon	40
Vic	Murray	40

The value reported as comparative year corresponds to the line item stated in the following table that were reported in the 2010 Account.

 

Restatement of comparative year information made for the line item 17.8 Non-allocated diversions – urban water system

2010 Account line items	Segment	Volume for the 2009–10 year reported in the 2010 Account (ML)	Difference due to regrouping of line items (ML)	Volume for the 2009–10 year reported in the 2011 Account (ML)
14.6.2 Diversion of unregulated flows – urban water access entitlement	Northern Basin	0	30	30
	Southern Basin	7,921	0	7,921
	Whole region	7,921	30	7,951

 

Changes in the value reported in the 2010 Account were due to regrouping of line items as a result of reclassifying 30 ML diversion in Paroo SDL area under urban water systems.