20.4 Delivery to irrigation scheme users

Supporting information

The volume reported (26,170 ML) represents the volume of water delivered from the irrigation schemes to users in the Adelaide region in the 2012–13 year.

Barossa Infrastructure Limited (BIL) supplements irrigation water for viticulture in the Barossa Valley. The volume of water delivered to BIL's customers in the 2012–13 year was the highest on record due to the driest spring and summer season experienced in the Barossa region since BIL was founded in 1998.

Volume of water delivered to irrigation scheme users in the 2012–13 year
Irrigation scheme Volume (ML) 
Barossa Infrastructure Limited (BIL) 7,717
Virginia Pipeline Scheme (VPS) 14,761
Willunga Basin Water Company (WBWC) 3,692
Total 26,170

Quantification approach

Data source

BIL annual report 2013 (BIL 2013); Water Reticulation Systems Virginia (WRSV); Willunga Basin Water Company (WBWC).

Provided by




The volume of water supplied to the customers between 1 July 2012–30 June 2013 was estimated from customers' meter reading done in October, December, February and April as BIL's customers water year extends from 1 October–30 September. This volume was provided in the BIL 2012–13 annual report.


The volume reported is from a meter at the Virginia Pipeline Scheme pump station.


The volume of water delivered via the WBWC to customers was provided by WBWC.

Assumptions, limitations, caveats and approximations

Barossa Infrastructure Limited

  • Customers' meters cannot be used directly as they were read to represent the water year (1 October–31 September). The values at 1 July 2012 and 30 June 2013 were estimated from these readings.

  • The area serviced by BIL extends beyond the boundary of the Adelaide region. It was assumed that the length of BIL infrastructure outside the Adelaide region is insignificant.

Water Reticulation Systems Virginia

  • Customers' meters are not read in June or July as this does not correspond to the irrigation water year. The volume reported was from the Virginia Pipeline Scheme pumping station and therefore the volume actually delivered to customers may be different due to leakage between the pumping station and customer meters
  • It is estimated that the actual volume of water measured at customers' meters is 5% less due to blocked meters and burst pipes.

Uncertainty information

The uncertainty estimate was not quantified.