Two bioretention systems located at the eastern corners of Gilbert and Russell Streets intersection and Gilbert and Owen Streets intersection.
Financial partners
This project was jointly funded by the Environment Protection Authority through the Australian Government Landcare Program as well as the City of Adelaide’s Catchment to Coast project to demonstrate action that can be taken at a street level to improve urban and coastal water quality.
WSUD features and design criteria
Previously, stormwater in the street was managed via the kerb and gutter system draining to a conventional underground stormwater pipe system and associated side entry pits (SEPs) at the end of the street. In the new design, all road runoff and stormwater systems from adjoining dwellings is directed to a series of raingardens that are located and sized to cater to the contributing sub-catchment.
These rain gardens include plants that are effective in removing nutrients and other pollutants from the stormwater, as well as plants that help improve the street amenity. Outlets have been designed to provide between 100 mm and 200 mm extended detention. The raingardens typically include three inspection and flushing pipes. Treated stormwater collected by the raingarden underdrains and any subsequent overflow discharges to the existing downstream drainage system.
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