Rain gardens are a strategy used increasingly by Councils to manage the stormwater run off from urban streets and buildings that enter Adelaide’s waterways and ends up in the ocean. Through clever design and vegetation, rain gardens capture the stormwater, trapping any pollutants on the surface, and filtering the water through the soil and plant roots. This improves the quality of the water, reduces the amount of water entering our waterways, provides greener gardens and open spaces for communities, and can help resolve flooding issues.
The EPA’s Rain Garden 500 Program provides local councils and others opportunity to apply to receive a grant to build rain gardens within their communities. The City of Mitcham was successful in its bid and has subsequently built rain gardens at seven prominent sites throughout the Council area.
Southfront designed Mitcham’s rain gardens with the aim of maintaining healthy trees, reducing downstream pollution and resolving flooding concerns.
To date, City of Mitcham has built rain gardens across Clapham, Torrens Park, Clarence Gardens and Springfield. The pictured rain garden, outside the Clapham Primary School, includes two cells, separated by internal rock weirs, which are stepped due to the steepness of the site and to reduce the risk of scour by high velocity runoff through the rain garden.