Monitoring Field Biofiltration Systems: Walker Street, Clifton Hill
(2007 – current)
The biofiltration basins at Clifton Hill, an inner city suburb of Melbourne, were constructed in 2007 to treat roof and road runoff from a residential catchment. Stormwater flows enter a sediment trap, which removes coarse sediment and protects the biofilters from clogging. Pre-treated flows are then split evenly between two biofiltration basins. Treated water is conveyed from the biofilters to a pond, before being discharged to the Merri Creek.
In addition to improved stormwater management, another important objective at this site was to use locally indigenous species for habitat creation.
Status: The monitoring equipment (to measure flows and water quality) was installed late 2008 / early 2009. Regular monitoring of flow began in mid 2009, with data being collected from 5 sites in total: at the inlet and outlet of each of the two parallel biofilters, as well as at the high flow bypass. For a total of 14 wet weather events, flow-weighted water quality samples were collected and analysed for sediment, nutrients and metals. Since monitoring is now complete, a final report is being prepared.