12.6 Delivery of water to irrigation scheme under inter-region agreement
The volume reported (3,991 ML) is the volume of River Murray water imported to Barossa Infrastructure Limited (BIL) in the 2011–12 year.
For more information on the entitlements and other arrangements under which water was imported, see line item 4.2 Irrigation scheme inter-region claim to water.
Murray water used by BIL is imported into the region by the following SA Water pipelines:
- The Mannum Adelaide Pipeline (MAPL): this is the preferred route. It conveys untreated water abstracted from the River Murray and then discharges it into Warren Reservoir, from where it is sent to BIL. BIL indicated that for the 2011–12 year, at least 95 % of the total water imported to its network came from the MAPL.
- The Swan Reach–Stockwell Pipeline (SRSPL): this route may be used to convey water abstracted from the River Murray and treated at Swan Reach water treatment plant.
Water Information and Licence Management Administration System (WILMA) database.
South Australian Department of Environment, Water and Natural Resources (DEWNR).
This volume was recorded in the DEWNR's WILMA database as the volume of water taken on BIL's water account. It is read at the BIL supply meter.
Assumptions, limitations, caveats and approximations
It is assumed that losses in the SA Water pipelines from the point of measurement up to the delivery point to BIL are negligible. This assumption is reasonable as BIL's total consumption of water for the 2011–12 year (4,128 ML, see line item 20.4 Delivery to irrigation scheme users) less the volume of recycled water transferred from Nuriootpa Community Waste Management Scheme (170 ML, see line item 12.18 Other irrigation water increases) gives 3,958 ML, which is very close to the value of 3,991 ML given for the line item 12.6. The difference between both values (33 ML) is assumed to be losses in the BIL irrigation system (see line item 20.3 Leakage to groundwater).