20.4 Delivery to irrigation scheme users

Supporting information

The volume reported in the water accounting statement (19,478 ML) represents the volume of water that was delivered from the irrigation scheme to users in the Adelaide region in the 2011–12 year.


Volume of water delivered to irrigation scheme users in the 2011–12 year

Irrigation scheme

Volume (ML) 

Barossa Infrastructure Limited (BIL) 4,128
Willunga Basin Water Company (WBWC) 2,470
Virginia Pipeline Scheme (VPS) 12,880
Total 19,478

Quantification approach

Data source

Water Infrastructure Group; Barossa Infrastructure Limited (BIL);

Willunga Basin Water Company (WBWC).

Provided by

Water Infrastructure Group; Barossa Infrastructure Limited (BIL);

Willunga Basin Water Company (WBWC).


Virginia Pipeline Scheme

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

Barossa Infrastructure Limited

The volume of water supplied to the customers between 1 July 2011 – 30 June 2012 was estimated from customers' meters reading done in October, December, February and April as BIL's customers water year extends from 1 October to 30 September.  

Willunga Basin Water Company

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

Assumptions, limitations, caveats and approximations

Virginia Pipeline Scheme

  • 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
  •  Estimate that the actual volume of water measured at customers' meters is 5% less due to blocked meters and burst pipes.

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 2011 and 30 June 2012 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.

Uncertainty information

The uncertainty estimate was not quantified.