Murray–Darling Basin
17.8 Entitled diversion of non-allocated surface water to urban water system

Supporting information

The volumetric value for the line item for the 2011–12 year was 9,861 ML. The line item represents entitled diversion of non-allocated surface water to 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 entitled diversion of non-allocated surface water to urban water systems in the MDB region in the 2011–12 year
Surface water resource plan area State/Territory  Volume (ML) 
 Code

Name
SW19 Warrego–Paroo–Nebine Qld 13
SW18 Condamine–Balonne Qld 2,693
SW17 Moonie Qld 3
SW16 Qld Border Rivers Qld 858
SW15 NSW Border Rivers NSW –
SW11 Barwon–Darling Watercourse NSW –
SW12 NSW Intersecting Streams NSW –
SW14 Gwydir NSW n/a
SW13 Namoi NSW n/a
SW10 Macquarie–Castlereagh NSW n/a
Sub-total Northern Basin 3,567
SW9 Lachlan NSW n/a
SW8 Murrumbidgee NSW NSW n/a
SW7 NSW Murray and Lower Darling NSW n/a
SW3 Northern Victoria Vic. 5,545
SW2 Vic. Murray Vic. 749
SW4 Wimmera–Mallee  Vic. n/a
SW6 Eastern Mount Lofty Ranges SA –
SW5 SA Murray SA –
SW1 ACT  ACT n/a
Sub-total Southern Basin 6,294
Total for the region 9,861

– = Data not available


Details of entitled diversion of non-allocated surface water to urban water systems in the MDB region in the 2011–12 year
Surface water resource plan area

Sustainable diversion limit area

State

 Volume (ML) for the 2011–12 year 

Code

Name
SW19 Warrego–Paroo–Nebine SS29 Paroo Qld 13
SS28 Warrego Qld

n/a
SS27 Nebine Qld 0
SW18 Condamine–Balonne SS26 Condamine–Balonne Qld 2,693
SW17 Moonie SS25 Moonie Qld 3
SW16 Qld Border Rivers SS24 Qld Border Rivers Qld 858
Sub-total Northern Basin 3,567
SW2 Vic. Murray SS3 Kiewa Vic. 482
SW3 Northern Victoria SS4 Ovens Vic. 1,700
SS5 Broken Vic. 0
SS6 Goulburn Vic. 3,107
SS7 Campaspe Vic. 0
SS8 Loddon Vic. 738
SW2 Vic. Murray SS2 Vic. Murray Vic. 267
Sub-total Southern Basin 6,294
Total for the region 9,861

 

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 1,130 ML that was transferred from the Wallaby and Silver creeks to Melbourne by the Melbourne Water Corporation.

Quantification approach

Data source

Murray–Darling Basin Authority: water audit monitoring (WAM) data received from Queensland (4 February 2013) and Victoria (21 March 2013), and stored in the HYDRO database.

Provided by

Bureau of Meteorology (the Bureau).

Method

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

Assumptions, limitations, caveats and approximations

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.

Uncertainty information

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 entitled diversion of non-allocated surface water to urban water systems for each jurisdiction
Jurisdiction All entitlement classes in following SDL areas WAM uncertainty (%)
Qld Paroo 5
Qld Condamine Balonne 5
Qld Moonie System 5
Qld Border Rivers 5
Vic. Kiewa 5
Vic. Ovens 5
Vic. Broken 10
Vic. Goulburn (bulk entitlements granted since 2006–07)

The uncertainty estimate was not quantified
Vic. Goulburn (others) 5
Vic. Campaspe

n/a
Vic. Loddon 5
Vic. Murray

The uncertainty estimate was not quantified


Comparative year

This line item corresponds to line item 17.8 Non-allocated diversions – urban water system reported in the 2011 Account.