Adelaide

The volume reported in the water accounting statement (149,649 ML) represents the delivery of water from SA Water’s storages (connected surface water) to their water treatment plants (water distribution system), which is conceptualised as a regulated flow for the purposes of the National Water Account 2010. SA Water’s claim to this water is represented as a surface water liability and non-physical water asset of the water distribution system. Refer to the 'Water rights, entitlements, allocations and trade' for further information. The line items relevant to these urban water access arrangements are presented in the table below.

Note: Corresponding connected surface water line items are shown in brackets and italics.

 For the purposes of the Adelaide region water accounting report, the water distribution system was considered to begin at SA Water’s water treatment plants (WTPs). The table below presents a summary of WTP inflows for 2009–10.

Data source

SA Water: Supervisory Control And Data Acquisition (SCADA) database.

Bureau of Meteorology: Water storage database, line item 13.1 Precipitation on connected surface water and line item 14.1 Evaporation from connected surface water. 

Data provider

Bureau of Meteorology.

Method

This item refers to the flow of water from SA Water’s storages (connected surface water store) into their water treatment plants (water distribution system) to supply urban customers. The seven WTPs listed in the table below receive water from the connected surface water store.

 Metered inflow data was obtained from the SA Water SCADA database for most of these WTPs. Inflow data was not available for the Barossa and Hope Valley WTPs. Barossa and Hope Valley WTP inflow was calculated from the respective WTP outflow allowing for a 5% loss through treatment process as shown in the table below.

Uncertainty

Uncertainty is +/–10% based on meter calibration.

Assumptions, approximations and caveats/limitations

Nil.