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.

 

Annual allocation for each bore field within the Perth region for the 2010–11 year

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

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 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

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 11.19

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