Murray-Darling Basin
9.5 Point return from irrigation scheme

The volumetric value for the line item for the 2010–11 year was 216,917 ML. The line item represents point discharge of water from irrigation schemes into surface water within the Murray–Darling Basin (MDB) region. The line item includes overflows from irrigation scheme water supply channels, discharge of used irrigation water from irrigation scheme collection systems and other irrigation scheme point discharges.

The following table summarises the information for the line item for the MDB region.

 

Point return of irrigation water to surface water within the MDB region during the 2010–11 year

Surface water resource plan area		State	Volume (ML) for the 2010–11 year
Code	Name
SW19	Warrego – Paroo – Nebine	Qld	–
SW18	Condamine–Balonne	Qld	–
SW17	Moonie	Qld	–
SW16	Qld Border Rivers	Qld	–
SW15	NSW Border Rivers	NSW	–
SW11	Barwon–Darling watercourse	NSW	–
SW12	NSW Intersecting Streams	NSW	–
SW14	Gwydir	NSW	–
SW13	Namoi	NSW	–
SW10	Macquarie–Castlereagh	NSW	–
Sub-total Northern Basin			0
SW9	Lachlan	NSW	–
SW8	Murrumbidgee NSW	NSW	57,029
SW7	NSW Murray and Lower Darling	NSW	–
SW3	Northern Victoria	Vic	–
SW2	Vic Murray	Vic	159,888
SW4	Wimmera–Mallee	Vic	–
SW6	Eastern Mount Lofty Ranges	SA	–
SW5	SA Murray	SA	–
SW1	ACT	ACT	–
Sub-total Southern Basin			216,917
Total for the region			216,917

– = Data not available

 

Information on point returns from irrigation schemes was provided in this line item only for Murrumbidgee and Victorian Murray river systems. There was no measured data available for the other irrigation areas within the MDB region. The details of the volume shown in the previous table are as follows:

•  the Coleambally irrigation area within Murrumbidgee New South Wales water resources plan area (57,029 ML)  

•  the Broken Creek irrigation system (21,954 ML) and Torrumbarry system (137,934 ML) within Victorian Murray water resources plan area.

Water audit monitoring data received from New South Wales (2 February 2011) and Victoria (31 January 2012), and stored in the Murray–Darling Basin Authority HYDRO database.

Murray–Darling Basin Authority.

The line item value was based on metered discharge data.

Nil.

The uncertainty estimate for the given volume is +/– 5%.

This line item corresponds to line item 13.4.3 Point return of irrigation water to connected surface water, reported in the 2010 Account. In the 2011 Account, the following change was made that caused the 2009–10 year value to be restated:

• Improved data sets were made available after the publication of the 2010 Account. New data were available for irrigation returns from Torrumbarry system within Victorian Murray water resources plan area for the 2009–10 year.

The changes and their respective values are detailed in the following table.

 

Restatement of comparative year information made for the line item 9.5 Point return from irrigation scheme

2010 Account line items	Segment	Volume for the 2009–10 year reported in the 2010 Account (ML)	Difference due to data availability (ML)	Volume for the 2009–10 year reported in the 2011 Account (ML)
13.4.3 Point return of irrigation water to connected surface water	Northern Basin	0	0	0
	Southern Basin	10,352	13,179	23,531
	Whole region	10,352	13,179	23,531