3.3 Recycled water system
The volume reported (17 ML) represents the volume of water held in SA Water's recycled main pipes network at 30 June 2013.
GIS analysis was used to identify recycled water pipes within the Adelaide region. The volume of water in these pipes were estimated from their total capacity.
The volumes of water held in pipes were estimated from pipe lengths and nominal diameters (stored in the Maximo system) using the following formula:
π x (D/2) x (D/2) x PL
D = Nominal diameter of the pipe
PL = Pipe length.
Assumptions, limitations, caveats and approximations
- Given the small variation between reporting years, it was assumed that pipe length remained unchanged in the 2012–13 year, compared to the 2011–12 year.
- Pipes were assumed to be 100% full in winter.
- Pipes without recorded construction dates were assumed to have been constructed before the 2012–13 year.
- Recycled water schemes not managed by SA Water, such as the Virginia Pipeline Scheme, were not included in estimated volumes.