Perth
42.6 Diversions from storages

Supporting Information

This line item refers to the total allocation diversion from storages that supply water to the urban water system. It does not includes the volume of releases to the downstream river.

Total volume of water diverted from each urban water supply storage within the Perth region during the 2010–11 year is provided in the following table.

 

Total diversion from each urban supply storage during the 2010–11 year

Storage

Diversion (ML)

Canning

15,113

Churchman Brook

480

Mundaring

27,482

North Dandalup

9,641

Samson Brook

1,644

Serpentine

29,019

Serpentine Pipehead

South Dandalup

18,589

Stirling

19,250

Victoria

2,178

Wungong

17,621

Total

141,017

 

Quantification Approach

Data Source

Water Corporation: Operational Data Storage System.

Provided by

Water Corporation.

Method

Total water abstracted from surface water storages for urban water supply within the Perth region is equal to the total annual water released from the storages during the 2010–11 year. The water volumes released from the storages are metered at the outlet continuously and reported on a monthly 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).