Perth
11.19 Increase of urban claim on groundwater

Supporting information

This line item volume (170,785 ML) represents the total water allocation for groundwater supply to the urban water system in the Perth region during the 2011–12 year.

The annual allocation for each bore field for the 2011–12 year is given in the following table.

 

Annual allocation for each bore field within the Perth region for the 2011–12 year

Groundwater source

Allocation (ML)

Perth city area

 

Gnangara

 47,550

Gwelup

 24,565

Jandakot

 11,595

Mirrabooka

 18,650

Perth

 59,905

Wanneroo

 5,900

Yanchep

 1,500

Southwest area

 

Murray

1,000

South West Coastal

120

Total

 170,785

 

Quantification approach

Data source

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.