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This article is about planted installations designed to capture and infiltrate at least some part of the stormwater received.
[[File:Edwards Gardens Bio 2014.JPG|thumb|alt=This is alt text|These bioretention cells at Edwards Gardens in Toronto receive inflow from hydraulically connected permeable paving]]
[[File:IMG 2457 750X500.jpg|thumb|Bioretention cell capturing and treating runoff from adjacent parking lot at the Kortright Centre, Vaughan.]]
This article is about planted installations designed to capture and infiltrate some or all of the stormwater received.
<br> For simple systems, without underdrains or storage reservoir (typically found n residential settings), see [[Rain gardens]].
<br> For simple systems, without underdrains or storage reservoir (typically found n residential settings), see [[Rain gardens]].
<br> For linear systems, which convey flow, but are otherwise similar to bioretention see [[Swales|Bioswales]].
<br> For linear systems, which convey flow, but are otherwise similar to bioretention see [[Swales|Bioswales]].
<br> For planted systems that do not infiltrate any water, see [[Stormwater planters]]
<br> For planted systems that do not infiltrate any water, see [[Stormwater planters]]
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==Overview==
==Overview==
:For ease of construction and to ensure that the vegetation has adequate space, cells should be no narrower than 0.6 m at any point.
:For ease of construction and to ensure that the vegetation has adequate space, cells should be no narrower than 0.6 m at any point.
:The maximum width of a facility is determined by the reach of the construction machinery, which must not be tracked into the cell.
:The maximum width of a facility is determined by the reach of the construction machinery, which must not be tracked into the cell.
The principles of bioretention can be applied in any scenario where planting or vegetation would normally be found.
===Private sites===
In single family residential sites [[Rain gardens|rain gardens]] most often take the form of a soft edged, traditional perennial planting bed.
As many private industrial, commercial and institutional sites have landscaping around their parking lots, [[Bioretention: Parking lots]] is an increasingly popular choice to manage stormwater.
===Streetscape===
Bioretention is a popular choice for making urban green space work harder. Design configurations include extending the cells to accommodate shade trees, and using retrofit opportunities to create complete streets with traffic calming and curb extensions or 'bump outs'. See [[Bioretention: Streetscapes]]
===Parkland and natural areas===
Naturalized landscaping and soft edges can make a bioretention facility 'disappear' into green space surroundings. In some scenarios, a larger bioretention (50 - 800 m<sup>2</sup>) cell may be used as an end-of-pipe facility treating both sheet flow and concentrated flow before it enters an adjacent water course. In these larger installations care must be made in the design to distribute the inflow, preventing erosion and maximizing infiltration.
==Infiltration==
Some form of stormwater landscaping (bioretention) can be fitted into most spaces. Although there are some [[Infiltration#Constraints|constraints]] to infiltrating water, it is preferable to do so where possible. [[Bioretention:_Partial_infiltration|Partial infiltration]] facilities are a popular choice over 'tight' soils where infiltration rates are ≤ 15 mm/hr.
Some form of stormwater landscaping (bioretention) can be fitted into most spaces. Although there are some [[Infiltration#Constraints|constraints]] to infiltrating water, it is preferable to do so where possible. [[Bioretention:_Partial_infiltration|Partial infiltration]] facilities are a popular choice over 'tight' soils where infiltration rates are ≤ 15 mm/hr.
{{:Bioretention: Variations}}
{{:Bioretention: Variations}}