Difference between revisions of "Bioswales"

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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>
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For underground conveyance which promotes infiltration, see [[exfiltration trenches]].
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For underground conveyance which promotes infiltration, see [[Exfiltration trenches]].
 
For design recommendations on grassed channels, see [[Enhanced grass swales]].
 
For design recommendations on grassed channels, see [[Enhanced grass swales]].
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 +
<p><strong>The fundamental components of a swale are:</strong>
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    <ul>
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        <li>Graded channel</li>
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        <li>Planting</li>
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    </ul>
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    <strong>Additional components may include:</strong>
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    <ul>
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        <li>[[Filter media]] - an engineered soil mix</li>
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        <li>[[Underdrain]] with clean out and inspection ports</li>
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        <li>[[Liner|Impermeable membrane]] to prevent infiltration to soils below</li>
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        <li>[[Turf reinforcement]] to prevent scour</li>
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        <li>[[Check dams]] to facilitate short tern ponding</li>
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    </ul>
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</p>

Revision as of 18:38, 2 August 2017

This article is about installations designed to capture and convey surface runoff along a vegetated channel, whilst also promoting infiltration.
For underground conveyance which promotes infiltration, see Exfiltration trenches. For design recommendations on grassed channels, see Enhanced grass swales.

The fundamental components of a swale are:

  • Graded channel
  • Planting
   Additional components may include:

The portion of water precipitated onto a catchment area, which then flows as surface discharge from the catchment area past a specified point.

Water from rain, snow melt, or irrigation that flows over the land surface.

The slow movement of water into or through a soil or drainage system.

Penetration of water through the ground surface.

A shallow constructed channel, often grass-lined, which is used as an alternative to curb and channel, or as a pretreatment to other measures. Swales are generally characterized by a broad top width to depth ratio and gentle grades.

Cleanouts are "a fitting access in a drainage system or venting system that is installed to provide access for cleaning and inspection and that is provided with a readily replaceable air tight cover" (O.Reg 332/12: Building Code, 2022).

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