Murray–Darling Basin
14.1 Adjustment and forfeiture of groundwater allocation

Supporting information
Quantification approach
Comparative year

Supporting information

The volumetric value for the line item for the 2011–12 year was 1,078,199 ML. The line item represents adjustment and forfeiture of allocation in groundwater resource plan areas excluding urban water systems within the Murray–Darling Basin (MDB) region. Information on adjustment and forfeiture of groundwater allocation for urban water systems is included in line item 14.2 Adjustment and forfeiture of groundwater allocation–urban water system.

The following two tables provide a summary and a breakdown of volumetric details of the line item.

Summary of adjustment and forfeiture of groundwater allocation (excluding urban water systems) in the MDB region in the 2011–12 year
Groundwater resource plan area		State/Territory	Volume (ML) for the 2011–12 year
Code	Name	State/Territory	Volume (ML) for the 2011–12 year
GW22	Warrego–Paroo–Nebine	Qld	–
GW21	Condamine–Balonne	Qld	62,607
GW20	Moonie	Qld	–11
GW19	Qld Border Rivers	Qld	5,242
GW18	New South Wales Border Rivers Alluvium	NSW	16,703
GW17	New England Fractured Rock and Northern Basalts	NSW	10,566
GW16	Eastern Porous Rock	NSW	17,360
GW15	Gwydir Alluvium	NSW	15,329
GW14	Namoi Alluvium	NSW	202,548
GW13	New South Wales Great Artesian Basin Shallow	NSW	4,687
GW12	Macquarie–Castlereagh Alluvium	NSW	50,165
GW11	Lachlan and South Western Fractured Rock	NSW	750
GW7	Darling Alluvium	NSW	–
*Sub-total Northern Basin*			*385,945*
GW11	Lachlan and South Western Fractured Rock	NSW	82,239
GW7	Darling Alluvium	NSW	876
GW10	Lachlan Alluvium	NSW	41,484
GW9	Murrumbidgee Alluvium	NSW	166,522
GW8	Murray Alluvium	NSW	191,909
GW6	Western Porous Rock	NSW	18,233
GW2	Goulburn–Murray	Vic.	161,346
GW3	Wimmera–Mallee (groundwater)	Vic.	21,409
GW5	Eastern Mount Lofty Ranges	SA	6,693
GW4	SA Murray	SA	969
GW1	Australian Capital Territory (groundwater)	ACT	574
*Sub-total Southern Basin*			*692,254*
Total for the region			1,078,199

Details of adjustment and forfeiture of groundwater allocation (excluding urban water systems) in the MDB region in the 2011–12 year
Groundwater resource plan area	Groundwater sustainable diversion limit (SDL) area		State/Territory	Entitlement class	Volume (ML) for the 2011–12 year
Groundwater resource plan area	Code	Name	State/Territory	Entitlement class	Volume (ML) for the 2011–12 year
GW21 Condamine–Balonne	GS53, GS58, GS61, GS64 and GS65	Condamine Fractured Rock, Sediments above the GAB: Condamine–Balonne, St George Alluvium: Condamine–Balonne (shallow and deep), Upper Condamine Alluvium and Upper Condamine Basalts	Qld	Aquifer	62,607
GW20 Moonie	GS59 and GS62	Sediments above the GAB: Moonie and St George Alluvium: Moonie	Qld	Aquifer	–11
GW19 Qld Border Rivers	GS54, GS55 and GS57	Qld Border Rivers Alluvium, Qld Border Rivers Fractured Rock and Sediments above the GAB: Border Rivers	Qld	Aquifer	5,242
*Sub-total Queensland*					*67,838*
GW18 New South Wales Border Rivers Alluvium	GS32	NSW Border Rivers Alluvium	NSW	Aquifer	15,146
GW18 New South Wales Border Rivers Alluvium	GS33	NSW Border Rivers Tributary Alluvium	NSW	Aquifer	1,557
GW17 New England Fractured Rock and Northern Basalts	GS18	Inverell Basalt	NSW	Aquifer	3,051
	GS22	Liverpool Ranges Basalt	NSW	Aquifer	384
	GS37	New England Fold Belt	NSW	Aquifer	7,060
	GS49	Warrumbungle Basalt	NSW	Aquifer	71
GW16 Eastern Porous Rock	GS17	Gunnedah–Oxley Basin MDB	NSW	Aquifer	15,002
GW16 Eastern Porous Rock	GS41	Sydney Basin MDB	NSW	Aquifer	2,358
GW15 Gwydir Alluvium	GS24	Lower Gwydir Alluvium	NSW	Aquifer	14,216
				Supplementary	1,113
				*Sub-total*	*15,329*
GW14 Namoi Alluvium	GS29	Lower Namoi Alluvium	NSW	Aquifer	56,519
				Supplementary	2,188
				*Sub-total*	*58,707*
	GS40	Peel Valley Alluvium	NSW	Aquifer	57,932
	GS47	Upper Namoi Alluvium	NSW	Aquifer	81,092
				Supplementary	4,817
				*Sub-total*	*85,909*
GW13 New South Wales Great Artesian Basin Shallow	GS34 to GS 36	New South Wales GAB: Surat Shallow, Warrego Shallow and Central Shallow	NSW	Aquifer	4,687
GW12 Macquarie–Castlereagh Alluvium	GS14	Castlereagh Alluvium	NSW	Aquifer	583
	GS26	Lower Macquarie Alluvium	NSW	Aquifer	49,463
				Supplementary	119
				*Sub-total*	*49,582*
GW 11 Lachlan and South Western Fractured Rock (Northern Basin)	GS19	Kanmantoo Fold Belt	NSW	Aquifer	750
GW 11 Lachlan and South Western Fractured Rock (Southern Basin)	GS10	Adelaide Fold Belt	NSW	Aquifer	1,780
	GS 20	Lachlan Fold Belt	NSW	Aquifer	65,558
				Salinity and water table management	0
				*Sub-total*	*65,558*
	GS39	Orange Basalt	NSW	Aquifer	9,079
	GS51	Young Granite	NSW	Aquifer	5,823
GW7 Darling Alluvium	GS23	Lower Darling Alluvium	NSW	Aquifer	876
GW10 Lachlan Alluvium	GS25	Lower Lachlan Alluvium	NSW	Aquifer	40,488
				Supplementary	996
				*Sub-total*	*41,484*
GW9 Murrumbidgee Alluvium	GS28	Lower Murrumbidgee Alluvium (shallow; Shepparton formation and deep; Calivil formation and Renmark Group)	NSW	Aquifer	164,183
				Supplementary	2,340
				*Sub-total*	*166,522*
GW8 Murray Alluvium	GS27	Lower Murray Alluvium (shallow; Shepparton formation and deep; Renmark Group and Calivil formation)	NSW	Aquifer	132,121
				Salinity and water table management	10
				Supplementary	22,735
				*Sub-total*	*154,866*
	GS46	Upper Murray Alluvium	NSW	Aquifer	37,043
GW6 Western Porous Rock	GS50	Western Porous Rock	NSW	Aquifer	18,233
				Salinity and water table management	0
				*Sub-total*	*18,233*
*Sub-total New South Wales*					*819,370*
GW2 Goulburn–Murray	GS8	Goulburn–Murray (Shepparton Irrigation Region, sedimentary plain, highlands and deep)	Vic.	Aquifer	161,346
GW3 Wimmera–Mallee (groundwater)	GS9	Wimmera–Mallee (sedimentary plain, highlands and deep)	Vic.	Aquifer	21,409
*Sub-total Victoria*					*182,755*
GW5 Eastern Mount Lofty Ranges	GS1	Angas Bremer (Quaternary sediments and Murray Group limestone)	SA	Aquifer	4,381
GW5 Eastern Mount Lofty Ranges	GS4	Marne Saunders (Murray Group limestone and Renmark Group)	SA	Aquifer	2,312
GW4 SA Murray	GS3	Mallee (Pliocene Sands, Murray Group limestone and Renmark Group)	SA	Aquifer	0
GW4 SA Murray	GS5	Peake–Roby–Sherlock (unconfined and confined)	SA	Aquifer	969
*Sub-total South Australia*					*7,662*
ACT (groundwater)	GS52	ACT (groundwater)	ACT	Aquifer	574
Sub-total Australian Capital Territory					574
Total					1,078,199

Additional information

SDL areas other than included in the tables may have values relevant to the line item; however, relevant information was not available for the 2012 Account.

With the exception of the Angas Bremer prescribed wells area and Marne Saunders prescribed water resource area, carry-over was not available either at the beginning or at the end of the year. Therefore all unused allocated groundwater was forfeited.

GS 32 NSW Border Rivers Alluvium includes both upstream Keetah Bridge and downstream Keetah Bridge alluvial groundwater sources.

GS 33 NSW Border Rivers Tributary Alluvium includes Macintyre and Ottleys Creek alluvial groundwater sources.

GS40 Peel Valley Alluvium–aquifer reports a combined volume based on water licences Aquifer, Aquifer (general security), and Domestic and Stock.

GS28 Lower Murrumbidgee Alluvium–aquifer reports a combined volume based on water licences Aquifer, and Domestic and Stock.

Volumes reported here under GS47 Upper Namoi Alluvium are sourced from the following groundwater sources:

Upper Namoi zone 1 Borambil creek
Upper Namoi zone 2 Cox'S Creek (Mullaley to Boggabri),
Upper Namoi zone 3 Mooki Valley (Breeza to Gunnedah)
Upper Namoi zone 4 Namoi valley (Keepit Reservoir to Gin's Leap)
Upper Namoi zone 5 Namoi Valley (Gin's Leap to Narrabri)
Upper Namoi zone 6 Tributaries of the Liverpool Range (South to Pine Road)
Upper Namoi zone 7 Yarraman Creek (east of Lake Goran to Mooki River)
Upper Namoi zone 8 Mooki Valley (Quirindi–Pine Road to Breeza)
Upper Namoi zone 9 Cox's Creek (up-stream Mullaley)
Upper Namoi zone 10 Warrah Creek
Upper Namoi zone 11 Maules Creek
Upper Namoi zone 12 Kelvin Valley.

Groundwater SDL areas for which data were not available for the line item
State	SDL area Code	Groundwater SDL area
Qld	GS56	Queensland MDB: Deep
Qld	GS60	Sediments above the Great Artesian Basin: Warrego–Paroo–Nebine
Qld	GS63	St George Alluvium: Warrego–Paroo–Nebine
Qld	GS66	Warrego Alluvium
NSW	GS43	Upper Gwydir Alluvium
NSW	GS30	Manilla Alluvium
NSW	GS48	Upper Namoi Tributary Alluvium
NSW	GS11	Bell Valley Alluvium
NSW	GS15	Collaburragundry–Talbragar Alluvium
NSW	GS16	Cudgegong Alluvium
NSW	GS45	Upper Macquarie Alluvium
NSW	GS12	Belubula Alluvium
NSW	GS44	Upper Lachlan Alluvium
NSW	GS21	Lake George Alluvium
NSW	GS31	Mid–Murrumbidgee Alluvium
NSW	GS13	Billabong Creek Alluvium
NSW	GS42	Upper Darling Alluvium
SA	GS2	Eastern Mount Lofty Ranges
SA	GS6	SA Murray
SA	GS7	SA Murray salt interception schemes

Quantification approach

Data source

(1) New South Wales Office of Water: water access licence statistics; (2) South Australian Department of Environment, Water and Natural Resources: water information and licence management data; and (3) Murray–Darling Basin Authority: water audit monitoring (WAM) data received from Australian Capital Territory (10 January 2013) and Victoria (21 March 2013). WAM data are stored in the Murray–Darling Basin Authority HYDRO database.

Provided by

Bureau of Meteorology (the Bureau).

Method

Adjustment and forfeiture of groundwater allocation was calculated by deducting the allocation extraction from allocation announcement.
Adjustment and forfeiture for Angas Bremer and Marne Saunders in South Australia was calculated by deducting the allocation extraction and the carry-over from allocation announcement.

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

The uncertainty estimate was not quantified.

Comparative year

Availability of updated information resulted in the restatement of the 2010–11 year volume. The respective volumes associated with the change are detailed in the following table.

Restatement of comparative year information made for the line item 14.1 Adjustment and forfeiture of groundwater allocation
Segment	2012 Account volume at 30 June 2011 (ML)	2011 Account volume at 30 June 2011 (ML)	Difference due to updated information (ML)
Northern Basin	271,847	271,847	0
Southern Basin	608,017	608,198	–181
Whole region	879,864	880,045	–181

The volume reported for Angas Bremer SDL area in the 2011 Account has been increased by 398 ML due to updated information. Allocation carry-over volume (579 ML) for Marne Saunders SDL area were not reported in the 2011 Account due to lack of information. As a result, same volume is included in the 2012 Account and included as negative adjustment and forfeiture volume for the 2010–11 year.

Murray–Darling Basin14.1 Adjustment and forfeiture of groundwater allocation