According to the Department’s guidelines for measurement (page 8 and 9), water users are required to measure:
- water abstracted from the water resource, and
- return flows.
Return flows are usually small streams occurring at different places and are not easy to measure. The Department regards them as part of the water loss of a scheme.
In schemes where it is possible to measure return flows, it is advised as it will give a more accurate water balance of the scheme.