Perth
11.19 Increase of urban claim on groundwater
Supporting Information
This line item refers to the total groundwater allocation for the bore fields within the Perth region that supply water to the urban water system.
The annual allocation for each bore field for the 2010–11 year is given in the following table.
Groundwater source |
Allocation (ML) |
Perth city area |
|
Gingin |
230 |
Gnangara |
47,455 |
Gwelup |
25,700 |
Jandakot |
14,020 |
Mirrabooka |
19,300 |
Perth |
59,110 |
Wanneroo |
5,800 |
Yanchep |
1,600 |
Southwest area |
|
Murray |
1,000 |
South West Coastal |
120 |
Total allocation |
174,335 |
Quantification Approach
Data Source
Provided by
Method
The Water Corporation manages the urban water system, which is subject to licence agreements for extraction of water from the bore fields. One of the conditions of the licence agreement is that the maximum amount of extraction 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 aquifer levels in the Perth region in October of the reporting year.
The total groundwater allocation announcement is assumed to be equal to 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 |
11.19 Increase of urban claim on groundwater |
23.11 Groundwater allocation announcement–urban holder |
122,350 |
122,350 |
Change in line item name and number |