Adelaide
12.4 Urban water discharge to irrigation scheme

Supporting Information

The volume (15,977 ML) reported in the water accounting statements is the volume of recycled water supplied from SA Water's wastewater treatment plants (WWTP) to the irrigation water supply system within the Adelaide region in the 2010–11 year. This volume included recycled water supplied from Christies Beach WWTP to the Willunga Basin Water Company and recycled water supplied from Bolivar WWTP to the Virginia Pipeline Scheme. The following table details the volume supplied from each WWTP to the respective irrigation scheme.

Recycled water supplied to irrigation schemes in the 2010–11 year
Wastewater treatment plant (WWTP) Volume of recycled water supplied to the irrigation scheme (ML)
Bolivar WWTP 14,395
Christies Beach WWTP 1,582
Total 15,977

Barossa Infrastructure Limited does not receive recycled water from Adelaide's urban water system.

Quantification Approach

Data Source

SA Water: WWTP records.

Provided by

SA Water.

Method

The 2010–11 volume of recycled water supplied from Bolivar and Christies Beach WWTPs to the irrigation scheme was supplied from WWTP records held by SA Water. The volume represents metered outflows that are manually read and recorded by plant operators.

Assumptions, Limitations, Caveats and Approximations

It is assumed that no leakages occur from WWTPs.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

In the 2010 Account the irrigation water supply system was reported as part of the urban water system; therefore there is no corresponding line item. However, the volume of urban water discharge to irrigation scheme was reported as part of line item 20.3.2 Application of water from urban water supply system and recycled water supply system for irrigation or outdoor use in the 2010 Account. The comparative year volume is 18,113 ML and is summarised in the following table.


Restatement of comparative year information for 12.4 Urban water discharge to irrigation scheme
2010 Account line item name WWTP Volume at 30 June 2010 reported in 2010 Account (ML) Value difference to volume reported due to reclassification (ML) Volume at 30 June 2010 reported in 2011 Account (ML)
Not reported in the 2010 account
Bolivar
  14,588 14,588
Christies Beach
  3,525 3,525
Total
18,113 18,113