10.6 Leakage from urban water system
Geographic Information System (GIS) database; unpublished National Performance Report (NPR) data.
GIS analysis was used to calculate the length of SA Water mains pipes within the Adelaide region. The infrastructure leakage index, which was 4.2 kL/km/day (SA Water's unpublished NPR data), was multiplied by this pipe length to obtain the 2012–13 leakage volume for Adelaide,
Assumptions, limitations, caveats and approximations
- It was assumed that pipe length, used to calculate the leakage volume, remained unchanged in the 2012–13 year, compared to the 2011–12 year.
- Assumes the volume reported represents both pipe bursts and background leakage (real losses) and, because it was not possible to separate the two components, the total volume is assumed as leakage to groundwater.
- Leakage from bulk transport pipelines (Mannum–Adelaide Pipeline, Murray Bridge–Onkaparinga Pipeline and Swan Reach–Stockwell Pipeline), wastewater pipelines, fire services and recycled water pipes were not quantified.
Derived from measured data. Estimated in the range +/– 30% to +/– 50%.