17.13 Surface water allocation diversion - irrigation scheme

Supporting Information

The volume recognised in the water accounting statements (161,155 ML) represents the allocation for bulk irrigation surface water entitlements in the Ord River Irrigation Area for the 2011 Account.

The volume includes irrigation entitlements for the Ord Irrigation Cooperative Limited and Water Corporation (WA) M1 Channel customers (pumpers and siphon users), as well as water used for the flushing of ponding effluent from the M1 Channel.

Surface water volumes diverted for irrigation during the 2011 and 2010 Accounts

Licensee, Source

Volume diverted (ML)


Volume diverted (ML)


Ord Irrigation Cooperative Ltd, Main Ord River



Water Corporation (WA) (M1 Channel), Main Ord River






Quantification Approach

Data Source

Department of Water: Annual Reports/Meter Card readings from licensees.

Provided by

Department of Water.


The Ord Irrigation Cooperative Limited measures the daily volume of water entering the Ord River Irrigation Area using meters located at the M1 off-take and the Packsaddle pump station.

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

Estimated uncertainty for metered information is +/–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 year information from the 2010 Account for line item 17.13

2011 Account line item

2010 Account line item

Value reported in the 2010 Account (ML)

Value reported in the 2011 Account (ML)

Additional information

17.13 Surface water allocation diversion – irrigation scheme Allocation diversion of regulated flows – bulk irrigator holder



Volume restated due to subsequent availability of actual meter readings