Adelaide

The volume reported in the water accounting statement (56,970 ML) represents all River Murray water transferred into the Adelaide Region under the River Murray Class 6 (formerly metropolitan Adelaide) licence including:

• nonpotable transfers through the Murray Bridge – Onkaparinga Pipeline (MBOPL)
• nonpotable transfers through the Mannum – Adelaide Pipeline (MAPL)
• potable transfers through the Swan Reach – Stockwell Pipeline (SRSPL).

The breakdown of River Murray transfers for 2009–10 by pipeline is presented in the table below.

^aThe total volume calculated as the sum of transfers through the three pipelines (52,677 ML) is less than the total volume reported in the water accounting statement (56,970 ML) due to differences and errors in the quantification approaches.

Data source

South Australian Department for Water: unpublished data provided to the Murray-Darling Basin (MDB) Ministerial Council (DFW 2010)

SA Water: Supervisory Control And Data Acquisition (SCADA), Geographic Information System (GIS) and Customer Service Information System (CSIS) databases.

Data provider

Bureau of Meteorology.

Method

Total River Murray transfers

Total River Murray diversions for 2009–10 associated with the Class 6 (formerly metropolitan Adelaide) licence were supplied by Department for Water from unpublished data provided to the MDB Ministerial Council in December 2010.

nonpotable transfers through Mt Bold–Onkaparinga Pipeline (MBOPL)

nonpotable transfers through the MBOPL were metered with a flow gauge. Metered flow for 2009–10 was extracted from the SA Water SCADA database.

nonpotable transfers through Mannum–Adelaide Pipeline (MAPL)

nonpotable transfers through the MAPL were metered with a flow gauge. Metered flow for 2009–10 was extracted from the SA Water SCADA database.

Potable transfers through Swan Reach–Stockwell Pipeline (SRSPL)

Potable transfers through the SRSPL into the Adelaide Region were not metered with a single flow gauge. These volumes were estimated using several methods for different components:

• urban supply to northern Adelaide from Swan Reach water treatment plants (WTPs) outside the Adelaide Region and delivered through the SRSPL
• release from the SRSPL into the Little Para River.

Potable water supply

A shapefile of the Adelaide Region was used to extract the service point numbers (SPNs) of meters within the Adelaide Region from the SA Water GIS database, which were supplied with potable water from the Swan Reach WTPs. The SPNs were used to extract readings for individual water meters from the SA Water CSIS database for 2009–10.

Water consumption was calculated by analysing the difference between consecutive meter readings and summed for 2009–10. To account for meter readings that occurred immediately before or after 2009–10, metered consumption was apportioned based on the equation:

V_r = ( t_r / t_m ) × V_m

where:

V_m = volume for metered period (kL)

V_r = volume for metered period within 2009–10(kL)

t_m = length of period between meter readings (days)

t_r = length of metered period within 2009–10 (days).

Releases into the Little Para River

Releases from SRSPL to the Little Para River were metered by a flow gauge. Metered flow for 2009–10 was obtained from the SA Water SCADA database. 

Uncertainty

Ungraded.

Assumptions, approximations and caveats/limitations

Total River Murray transfers

This figure only relates to transfers associated with the River Murray Class 6 (formerly metropolitan Adelaide) licence. SA Water also transfers River Murray water associated with other River Murray licences, such as River Murray Class 3a (formerly irrigation), for third parties, including Barossa Infrastructure Limited (BIL), into the Adelaide Region.

nonpotable transfers through MBOPL

Nil.

nonpotable transfers through MAPL

Nil.

Potable transfers through SRSPL

This component includes some River Murray water that was delivered directly to the water distribution system (i.e. the urban potable supply for northern Adelaide and delivery to BIL, but have been lumped into a single term for simplicity). Two other line items have been added to correct this oversimplification—line item 14.10 Other lumped surface water decreases to decrease connected surface water and line item 19.7 Other lumped water distrtibution system increases to increase the water distribution system by the appropriate volume.