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

The volumetric value for the line item for the 2012–13 year was 13,073 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.

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 sustainable diversion limit area includes 1,071 ML that was transferred from the Wallaby and Silver creeks to Melbourne by the Melbourne Water Corporation.

Murray–Darling Basin Authority: water audit monitoring (WAM) data received from Queensland (5 February 2014) and Victoria (14 February 2014), and stored in the HYDRO database.

Bureau of Meteorology.

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.