Perth
17.14 Surface water transfer under inter-region commitment

Supporting Information

This line item refers to the total water abstracted from Helena River (Mundaring Reservoir) for water supply to the Kalgoorlie Goldfields and Agricultural region, located outside of the Perth region boundary.

Quantification Approach

Data Source

Water Corporation: Operational Data Storage System.

Provided by

Water Corporation.

Method

The volume of water diverted from Helena River (Mundaring Reservoir) for water supply to the Kalgoorlie Goldfields and Agricultural region is measured at the flow meter at Mundaring Reservoir on an almost continuous basis.

Assumptions, Limitations, Caveats and Approximations

Nil.

Uncertainty Information

Expected error for water meters is +/– 5%.

The Department of Water requires that all water meters, when tested in situ conditions, must be within 5% accuracy across the full flow rate range (Guidelines for water meter installation 2009).

Comparative year

The following table presents substantive changes in the line item reported in this 2011 Account with the corresponding line item in the 2010 Account.

 

Comparative year information for line item 17.14

2011 Account line item

2010 Account line item

2011 Account volume for the 2009–10 year (ML)

2010 Account volume for the 2009–10 year (ML)

Change from the 2010 Account to the 2011 Account

17.14 Surface water transfer under inter-region commitment

14.10 Other lumped surface water decreases

26,658

26,658

Change in line item name and number