Comparison of Present and Future Water Supply Systems in Australia

The provided diagrams illustrate the current water supply infrastructure in an Australian city and compare it with a proposed future model. Overall, the transition represents a move from a linear system, where water is used and discarded into the environment, to a closed-loop system that emphasises recycling and resource recovery.

In the present system, water is sourced from a dam or storage facility and supplied directly to the city, which comprises households, factories, and shops. Once used, the resulting waste water is transported to a treatment plant, from where it is discharged into a nearby river. Additionally, storm water from the city is released directly into the river, representing a significant loss of potential water resources.

In contrast, the future system introduces a more sustainable approach. While the initial supply from the dam remains the same, the management of output is fundamentally altered. Both waste water and storm water are redirected from the city to the water treatment plant. Crucially, instead of discharging this water into the river, the plant treats and recycles it, supplying it back to the city. This circular process significantly reduces reliance on external storage and minimises environmental impact.