10.8 Managed aquifer recharge - private user
The volume displayed in the statement (5,455 ML) represents the volume of water injected into aquifers by local councils via a managed aquifer recharge scheme in 2010–11. Most of these schemes involve treating stormwater through constructed wetlands and storing the treated water in aquifers (Stormwater Management Authority 2009; Office for Water Security 2010).
The volume of water injected via the recharge scheme has decreased from 2009–10. This difference is likely due to the way in which managed aquifer recharge was reported in 2010. In 2010 the injection volumes were supplied by the Adelaide and Mount Lofty Ranges Natural Resources Management Board and represented typical volumes of recharge based on long-term planning. In 2011 the volumes reported refer to the actual year of reporting.
The volume was sourced from a fact sheet collated by the Adelaide and Mount Lofty Ranges Natural Resources Management board using data provided by local councils responsible for the operation of the stormwater harvesting programs.
Assumptions, Limitations, Caveats and Approximations
- These data are based on the 2010 calendar year not the financial year. Nevertheless the data are considered relevant because typically the majority of water is injected after June when more water is available.
- This data only refers to significant managed aquifer recharge schemes operated by local councils and excludes smaller private schemes.
- The volume displayed indicates the self-disclosed volume of water injected within the region (including prescribed areas) during the calendar year. This may be metered, but meters may not necessarily be read by an independent authority.
- The fact sheet defines stormwater to be all surface water flowing through an urban catchment. This will include creeks and rivers defined as surface water within the National Water Account.