Adelaide
18.11 Entitled extraction of allocated groundwater to users

Supporting information

The volume of groundwater extracted under water licences during 2011–12 was 17,379 ML. The groundwater extraction volume increased compared to the previous reporting period (2010–11: 15,019 ML). Licences were issued for the first time during the 2011-12 year on Dry Creek Prescribed Wells Area (PWA) for industrial salt production. In previous years, extractions in Dry Creek PWA were made under a notice of prohibition. The table below details the groundwater extractions by prescribed areas and whether they were metered or not.

 

Licensed groundwater extractions in the Adelaide region during the 2011–12 year

Prescribed area

Volume (ML)

Barossa Prescribed Water Resources Area (PWRA)

 

Metered

2,035

Non-metered

116

Subtotal

2,151

McLaren Vale PWA

 

Metered

3,759

Non-metered

4

Subtotal

3,763

Northern Adelaide Plains PWA

 

Metered

10,960

Non-metered

505

Subtotal

11,465

Dry Creek PWA

Total

17,379 

 – means no data available

For more information on the groundwater licences and allocations, see line item 6.1 Groundwater allocation remaining.

 

Quantification approach

Data source

South Australian Department of Environment, Water and Natural Resources (DEWNR): Water Information and Licence Management Administration System (WILMA) database.

Provided by

South Australian Department of Environment, Water and Natural Resources (DEWNR).

Method

Barossa Prescribed Water Resources Area (PWRA)

Metered extraction was obtained from the WILMA licensing database. Non–metered extractions were estimated by DEWNR.

The non-metered extractions in the Barossa PWRA were calculated by comparing meter readings with allocations to determine the average level of water taken. The average was applied to the allocations where meter readings were not available and used to determine the usage amount.

Non-metered water allocated for the purpose of stock and domestic was estimated at 100% usage of the allocation. 

McLaren Vale Prescribed Wells Area (PWA)

Metered extraction was obtained from the WILMA licensing database. Non–metered extractions were estimated by DEWNR.

The non-metered extractions in the McLaren Vale PWA were calculated by comparing meter readings with allocations to determine the average level of water taken. The average was applied to the allocations where meter readings were not available and used to determine the usage amount.

Non-metered water allocated for the purpose of stock and domestic was estimated at 100% usage of the allocation.

Northern Adelaide Plains PWA

Metered extraction was obtained from the WILMA licensing database. Non–metered extractions were estimated by DEWNR.

The non-metered extractions in the Northern Adelaide Plains PWA were calculated by comparing meter readings with allocations to determine the average level of water taken. The average was applied to the allocations where meter readings were not available and used to determine the usage amount.

Non-metered water allocated for the purpose of stock and domestic was estimated at 100% usage of the allocation. 

Assumptions, limitations, caveats and approximations

The assumptions made to calculate non-metered diversions (see 'Method') were validated by DEWNR water licensing staff members.

Uncertainty information

The uncertainty estimate was not quantified.

Comparative year

This line item corresponds to line item 18.11 Groundwater allocation extraction reported in the 2011 Account.