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| This article is about installations designed to capture and convey surface runoff along a vegetated channel, whilst also promoting infiltration. <br> | | This article is about installations designed to capture and convey surface runoff along a vegetated channel, whilst also promoting infiltration. <br> |
| For underground conveyance which promotes infiltration, see [[Exfiltration trenches]]. <br> | | For underground conveyance which promotes infiltration, see [[Exfiltration trenches]]. <br> |
| For design recommendations on grassed channels, see [[Enhanced grass swales]]. | | For design recommendations on grassed channels, see [[Enhanced swales]]. |
| ==Overview== | | ==Overview== |
| <strong>The fundamental components of a bioswale are:</strong>
| | '''The fundamental components of a bioswale are:''' |
| *A graded channel | | *A graded channel |
| *Planting | | *Planting |
| | *[[Underdrain]] with clean out and inspection ports |
| *[[Bioretention: Filter media | Filter media]], to permit infiltration into the facility (not necessarily to soils below) | | *[[Bioretention: Filter media | Filter media]], to permit infiltration into the facility (not necessarily to soils below) |
| <strong>Additional components may include:</strong>
| | '''Additional components may include:''' |
| *[[Underdrain]] with clean out and inspection ports
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| *[[Liner|Impermeable membrane]] to prevent infiltration to soils below | | *[[Liner|Impermeable membrane]] to prevent infiltration to soils below |
| *[[Check dams]] to facilitate short tern ponding | | *[[Check dams]] to facilitate short tern ponding |
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| ==Planning considerations== | | ==Planning considerations== |
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| ==Design== | | ==Design== |