Perth

                                                                                                   

19.8.5 Allocation diversion of regulated flows—urban holder

                             

Supporting information   


This line item refers to the volume of water abstracted from major reservoirs for urban water supply.

Total surface water abstracted from each surface water resource for public water supply to the Perth region during 2009-10 is given below.

 

Surface water resource

Reservoir

Total water abstracted (ML)

Perth city region

 

 

Canning River

Canning and Araluen Pumpback

31,371

Churchman Brook

Churchman Brook

1,772

Conjurunup Creek

Conjurunup Pumpback

3,159(1)

Helena River

Mundaring

1,888

Kangaroo Gully

Kangaroo Gully Diversion

1,699(1)

Munday Brook

Victoria and Bickley Pumpback

4,047

North Dandalup River

North Dandalup

8,581

Serpentine River

Serpentine and Serpentine Pipehead

43,097

South Dandalup River

South Dandalup and Lower South Dandalup Pumpback

10,199

Wungong Brook

Wungong

3,496

Southwest region

 

 

Harvey River

Stirling

22,982

Harvey River

Wokalup Pipehead

0

Samson Brook

Samson and Samson Pipehead

8,904

Other

 

 

Murray River and tributaries (Dwellingup)

 

81

Murray River and tributaries (Williams)

 

0

Total allocation diversion

141,276

(1) Pumpback reservoirs

 

Quantification approach   


Data source

Water Corporation: Operational Data Storage System.

 

Data provider

Water Corporation.

 

Method

Total water abstracted from reservoirs for public water supply within the Perth region is equal to the total annual water released from the reservoirs during the reporting period. The water volumes released from the reservoirs are metered at the outlet continuously and reported on a monthly basis.

 

Uncertainty

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 (Department of Water 2009).

 

Approximations, assumptions, caveats/limitations

Nil.