Perth
11.18 Increase of urban claim on surface water

Supporting Information

This line item refers to the surface water allocations for the major storages within the Perth region that supply water to the urban water system.

All but one of the 14 surface water resources are used for urban water supply within the Perth region. The other (Helena River), primarily supplies water to the Kalgoorlie Goldfields, located outside of the Perth region boundary.

The annual allocation for each surface water resource for the 2010–11 year is given in the following table.

 

Annual allocation for each surface water resource within the Perth region for the 2010–11 year

Surface water resource

Storage

Allocation (ML)

Perth city area

 

 

Canning River

Canning and Araluen Pumpback

34,200

Churchman Brook

Churchman Brook

3,700

Conjurunup Creek

Conjurunup Pumpback

6,000

Kangaroo Gully

Kangaroo Gully Diversion

3,500

Munday Brook

New Victoria and Bickley Pumpback

4,300

North Dandalup River

North Dandalup

22,200

Serpentine River

Serpentine Main and Serpentine Pipehead

53,800

South Dandalup River

South Dandalup and Lower South Dandalup Pumpback

26,900

Wungong Brook

Wungong

20,600

Southwest area

 

 

Harvey River

Stirling

40,610

Harvey River

Wokalup Pipehead

9,500

Samson Brook

Samson Main and Samson Pipehead

14,540

Other

 

 

Murray River and tributaries (Dwellingup)

 

167

Murray River and tributaries (Williams)

 

140

Total allocation

240,157

 

Quantification Approach

Data Source

Department of Water: Water Resource Licensing database.

Provided by

Department of Water.

Method

The Water Corporation manages the urban water system, which is subject to licence agreements for abstraction of water from the surface water storages. One of the conditions of the licence agreement is that the maximum amount of abstraction for each year is announced by the Minister for Water on an annual basis. The announced allocation is made after a review, by the Department of Water, of storage water levels in the Perth region in October of the reporting year.

The total surface water allocation announcement is assumed to equal 100% of the annual entitlement.

Assumptions, Limitations, Caveats and Approximations

Nil.

Uncertainty Information

There is no uncertainty associated with this value.

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 11.18

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

11.18 Increase of urban claim on surface water

23.9 Allocation announcement on regulated flows–urban holder

240,157

240,157

Change in line item name and number