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.
|
Line item |
Volume (ML) |
|---|---|
|
23.8 Allocation announcement/claim recognition on regulated flows—urban water access entitlement/arrangement
(25.1.4 Allocation announcement/claim recognition on regulated flows—urban water access entitlement/arrangement) |
149,649
(149,649) |
|
Net water asset increase to the region from this internal transaction |
0 |
|
19.8.4 Allocation/claim diversion of regulated flows—urban water access entitlement/arrangement
(14.7.4 Allocation/claim diversion of regulated flows—urban water access entitlement/arrangement) |
149,649
(149,649) |
|
Net water inflow to the region from this internal transaction |
0 |
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.
|
Water treatment plant |
Water source |
2009–10 WTP inflow (ML) |
|---|---|---|
|
Anstey Hill |
Millbrook Tanks |
25,118 |
|
Barossa |
Barossa Reservoir |
12,899 |
|
Happy Valley |
Happy Valley Reservoir |
66,651 |
|
Hope Valley |
Hope Valley Reservoir |
19,178 |
|
Little Para |
Little Para Reservoir |
14,683 |
|
Myponga |
Myponga Reservoir |
5,586 |
|
Summit Storage |
Summit Storage Reservoir |
5,533 |
|
Total |
149,649 |
|
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.
Bureau of Meteorology.
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.
|
Water treatment plant |
Quantification approach |
Water source |
|---|---|---|
|
Anstey Hill |
Metered inflow |
Myponga Reservoir |
|
Barossa |
Metered outflow × 1.05 |
Barossa Reservoir |
|
Happy Valley |
Metered inflow |
Happy Valley Reservoir |
|
Hope Valley |
Metered outflow × 1.05 |
Hope Valley Reservoir |
|
Little Para |
Metered inflow |
Little Para Reservoir |
|
Myponga |
Metered inflow |
Myponga Reservoir |
|
Summit Storage |
Metered inflow |
Summit Storage Reservoir |
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.
|
Calculation |
Component |
Data source |
|---|---|---|
|
|
Transfer from Gorge Weir to Hope Valley Reservoir |
SCADA |
|
add |
Storage at 1 July 2009 |
Bureau of Meteorology Water Storage database |
|
minus |
Storage at 30 June 2010 |
Bureau of Meteorology Water Storage database |
|
add |
Precipitation |
Line item 13.1 Precipitation on connected surface water |
|
minus |
Evaporation |
Line item 14.1 Evaporation from connected surface water |
Uncertainty is +/–10% based on meter calibration.
Nil.