Bioretention System

A Bioretention System is a system that uses vegetation to reduce downstream flow velocities and subsequent drain sizes whilst facilitating treatment. Bio-retention systems combine various Water Sensitive Urban Design (WSUD) treatment types in one 'treatment train'. A system is designed to carry out primary and/or secondary treatment processes of stormwaters and retard flows. This retention or retardation can enable sediments to precipitate out of the water taking along with it some pollutants. The use of biological processes to 'treat' stormwater whilst facilitating conveyance and retention gives rise to the title of Bio-retention.

A Bioretention System is typically a well-vegetated, retention cell or pond designed to enhance water filtration through a specially prepared sub-surface sand filter. Bio-retention cells may be incorporated into grass or vegetated swales or may be a stand-alone treatment system. The system incorporates vegetation with medium-term stormwater retention and sub-surface filtration/infiltration.

Incorporating Trees into Bioretention Systems

Prioritising Biorention System Maintenance


Related Pages

External Links & References

  1. Melbourne Water
  2. Water by Design
  3. Google Search
  4. Ideanthro Bioretention Video Playlist
  5. Wikipedia Article
  6. Construction and Establishment Guidelines: Swales, Bioretention Systems and Wetlands (Water by Design)
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