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.
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
Provided by
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
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.
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 |