11.6 Delivery of desalinated water to urban water system
a. Delivery of desalinated water to urban water system
The volume reported (3,816 ML) represents the delivery of desalinated water into the Adelaide region's urban water system during the 2011–12 year.
Sea water is taken from the Gulf St Vincent and treated at the Adelaide Desalination Plant (ADP). On 14 October 2011, the ADP commenced the transfer of desalinated drinking water to the Happy Valley Water Treatment Plant, where it is mixed with water treated in situ before supply to the urban customers. Refer to the Other water resources and systems section of the 'Contextual information' for more information on the ADP.
b. Urban water system overview
The urban water supply system is one of three sub-components of Adelaide's urban water system. The three sub-components are the:
- urban water supply system
- wastewater system
- recycled water system.
During the 2011–12 year, the majority (66%) of Adelaide's urban water was sourced from catchments within the region (line item 11.2). Imported River Murray (line item 11.9) water constituted approximately 31% of the urban water supply system's source water. Also, during the 2011–12 year, the Adelaide desalination plant commenced operating and made up the remaining 3% of Adelaide's urban water sources (line item 11.6).
Urban potable water consumption (line item 19.4) was 127,729 ML during the 2011–12 year, representing 84% of all outflows from the urban water supply system. A very small volume of water (2%) was transferred out of the region via normal operations in SA Water's service area (line item 19.11). Non-revenue water, including pipes bursting and background leakage (line item 19.3) and other losses (line item 19.20), made up the remaining urban water supply system outflows.
The following figure shows all the inflows and outflows for the urban water supply system. For more detail on a particular flow associated with the urban water supply system, refer to the line item notes.
Schematic diagram of water inflows and outflows for Adelaide's urban water supply system during the 2011–12 year; line item numbers are provided in brackets
Supervisory Control and Data Acquisition (SCADA) database.
Metered volume at the outlet of the Adelaide Desalination Plant.
Assumptions, limitations, caveats and approximations