Adelaide
18.11 Entitled extraction of allocated groundwater to users

The volume reported (27,528 ML) represents the volume of groundwater extracted under water licences in the Adelaide region during the 2012–13 year. The table below details the groundwater extractions by management area and measurement type.

Licenced groundwater extractions in the Adelaide region during the 2012–13 year

Management area	Item	Volume (ML)
Barossa Prescribed Water Resources Area (PWRA)	metered extractions1	3,381
	non-metered—estimated stock and domestic extractions2	29
	non-metered—estimated other extractions3	1,441
	Subtotal	4,851
McLaren Vale Prescribed Wells Area (PWA)	metered extractions	4,376
	non-metered—estimated stock and domestic extractions4	8
	non-metered—estimated recharged groundwater credits extraction5	6
	non-metered—estimated extraction of groundwater allocation carry-over6	1,110
	Subtotal	5,500
Northern Adelaide Plains PWA	metered extractions	12,502
	non-metered—estimated stock and domestic extractions7	174
	non-metered—estimated recharged groundwater credits extraction8	4,501
	Subtotal	17,177
Dry Creek PWA	no data available	–
	Subtotal	–
Total		27,528

¹ This volume includes metered extractions of rollover groundwater allocations.

^{2, 4, 7} Assume 100% of groundwater allocated for stock and domestic purposes was extracted, reported at line item 22.1 Groundwater allocation announcements.

³ Refer to quantification approach for estimated other non-metered extractions in the Barossa PWRA

^{5, 8} Assume 100% of recharged groundwater credits allocated were extracted, reported at line item 22.1 Groundwater allocation announcements.

⁶ Assume 66.3% of rollover groundwater allocations at 1 July 2012 was extracted in the McLaren Vale PWA, reported at line item 6.1 Groundwater allocation remaining. Refer to quantification approach for percentage applied.

South Australian Department of Environment, Water and Natural Resources (DEWNR): Water Information and Licence Management Administration System (WILMA) database; Bureau of Meteorology: calculations of non-metered groundwater extractions.

DEWNR; Bureau of Meteorology.

Metered extraction data were obtained from the WILMA licensing database.

Non-metered extractions for stock and domestic licences were estimated at 100% of the stock and domestic allocation for all management areas, reported at line item 22.1 Groundwater allocation announcements.

Non-metered extractions for recharged water were estimated at 100% extraction of the recharged water credits allocation for the McLaren Valen PWA and Northern Adelaide Plains PWA, reported at line item 22.1 Groundwater allocation announcements.

Non-metered other groundwater extractions in the Barossa PWRA were calculated by estimating the percentage of allocated groundwater extracted, then applying this percentage to the groundwater exceptions as reported in the WILMA database. This calculation is summarised in the following table.

Calculation of non-metered other groundwater extractions in the Barossa PWRA during the 2012–13 year

Calculation	Item	Volume (ML)
	metered diversions in the Barossa PWRA	3,381
add	estimated stock and domestic extractions	29
Subtotal extractions		3,410
divided by	22.1 Groundwater allocation announcements (for the Barossa PWRA only)	7,828
equals	percentage usage in the Barossa PWRA	43.56%
multiply	groundwater exceptions in the Barossa PWRA	3,308
equals	non-metered—estimated other extractions	1,441

Non-metered extraction of groundwater allocation carryover in the McLaren Vale PWA was calculated by estimating the percentage extraction of allocated groundwater, then applying this percentage to the groundwater allocation carryover reported at line item '6.1 Groundwater allocation remaining' at 1 July 2012.  This calculation is summarised in the following table.

Calculation of non-metered extractions of groundwater allocation carryover in the McLaren Vale PWA during the 2012–13 year

Calculation	Item	Volume (ML)
	metered diversions in the McLaren Vale PWA	4,376
add	estimated stock and domestic extractions	8
add	estimated recharged water credits extraction	6
Subtotal extractions		4,390
divided by	22.1 Groundwater allocation announcements (for the McLaren Vale PWA only)	6,617
equals	percentage usage in the McLaren Vale PWA	66.34%
multiply	groundwater allocation carry-over for McLaren Vale PWA at 1 July 2012 (reported at line item 6.1 Groundwater allocation remaining)	1,673
equals	non-metered—estimated extraction of groundwater allocation carryover	1,110

The assumptions made to calculate non-metered extractions were validated by DEWNR. The calculation of non-metered diversions was made by the Bureau.

The uncertainty estimate was not quantified.