Raingardens, also called bioretention systems, are vegetated filters that slow down stormwater and filter it as it flows downward through the soil profile.
They provide high levels of stormwater treatment in a relatively small footprint and, as they resemble a normal garden bed, also offer landscaping benefits.
They provide efficient treatment of stormwater through fine filtration, extended detention, and biological uptake. They effectively remove nitrogen and other soluble or fine particulate contaminants and also provide flow retardation.
Bioretention systems can be designed in almost any shape or size.
Note that because of Moonee Valley’s highly reactive clay soils, all raingardens need to be fully lined with an impervious liner and have their overflow pipe and aggie drain (agricultural pipe) connected to the stormwater system/Legal Point of Discharge.
Raingardens must be located a minimum of 300mm away from neighbouring buildings.
Your WSUD application tools
- If you are considering installing a raingarden as part of your Planning Application, materials and installation guides can be found here for in-ground, and planter box styles.
- Make sure your Site Layout Plan, Ground Floor Plan, and Roof Plan reflect the information contained in the WSUD Report (i.e. the STORM or MUSIC report).
- As a condition of your planning permit you will need to complete and submit a WSUD Site Management Plan. A WSUD SMP guide is available here: Keeping Our Stormwater Clean: A Builder’s Guide by Melbourne Water and the EPA Victoria.
- View these fact sheets guiding applicants through Moonee Valley's Sustainable Design Assessment in the Planning Process (SDAPP).