Ord
18.12 Groundwater allocation diversion - urban water system

Supporting Information

The volume recognised in the water accounting statements (1,774 ML) represents the allocation extracted for urban groundwater entitlements in the Ord region for the 2011 Account.

During the year, the Western Australian Department of Water administered the licences as provided in the table below.

 

Groundwater licences for the urban system for the 2011 Account

Licensee, Source

Volume extracted (ML)

 2010-11

Water Corporation (WA), Kununurra Town Water Supply Borefield

1,361

Water Corporation (WA), Halls Creek Town Water Supply

413

Total

1,774

 

Quantification Approach

Data Source

Water Corporation (WA) Operational Data Storage System database.

Provided by

Water Corporation (WA).

Method

The Water Corporation measures the weekly volume of water extracted for urban water supply from borefields around Kununurra and Halls Creek.

Assumptions, Limitations, Caveats and Approximations

  • 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 18.12

2011 Account line item

2010 Account line item

Value reported in the 2010 Account (ML)

Value reported in the 2011 Account (ML)

Additional information

18.12 Groundwater allocation diversion – urban water system

16.5.3.4 Groundwater allocation extraction – urban holder

1,670

1,682

Volume restated due to subsequent availability of actual meter readings