17.12 Surface water allocation diversion - urban water system

Supporting Information

The volume recognised in the water accounting statements (430 ML) represents the allocation for urban surface water entitlements for the Ord region during the 2010–11 year.

A breakdown of surface water diversions – urban system is provided in the table below.

Breakdown table of surface water diversions for the urban system

Licensee, Source

Volume diverted (ML)


Volume diverted (ML)


Water Corporation, Moochalabra Dam/Wyndham



Lake Argyle Pty Ltd, Main Ord River/Lake Argyle Village






Quantification Approach

Data Source

Water Corporation: Operational Data Storage System database.

Provided by

Water Corporation.


The Water Corporation measures the daily volume of water abstracted from Moochalabra Dam for supply to Wyndham and Main Ord River for supply to Lake Argyle Village.

Assumptions, Limitations, Caveats and Approximations

For licences that are metered, the licensee is required to install a cumulative water meter of a type approved under the Rights in Water and Irrigation (Approved Meters) Order 2009 for each water draw point under the licence. The licensee must ensure the installed meter(s) accuracy is maintained to within +/– 5% of the volume metered, in field conditions.

Meters must be installed in accordance with the provisions of the  Guidelines for Water Meter Installation (Department of Water 2009).

Uncertainty Information

Derived from measured data. Uncertainty range +/– 5%.

Comparative year

The following table compares the value for the 2009–10 year reported in this account with the corresponding value reported in the 2010 Account.

Comparative information from the 2010 Account for line item 17.12

2011 Account line item

2010 Account line item

Value reported in the 2010 Account (ML)

Value reported in the 2011 Account (ML)

Additional information

17.12 Surface water allocation diversion - urban water system Allocation diversion of regulated flows Urban holder



Licence reclassification and availability of meter readings