Swales

From LID SWM Planning and Design Guide
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This article is about planted installations designed to capture and convey surface runoff through an engineered soil with subterranean infrastructure.

Overview[edit]

Swales are linear landscape features consisting of a drainage channel with gently sloping sides. Underground they are filled with engineered soil and a water storage layer of coarse gravel material.
They are sometimes referred to as 'dry swales', 'vegetated swales', 'water quality swales' or 'inline bioretention'.

Swales are an ideal technology for:

  • Sites with long linear landscaped areas, such as parking lots
  • Connecting with one or more other types of LID



The fundamental components of a swale are:

  • Biomedia - an engineered soil mix
  • Planting
  • Underdrain with clean out and inspection ports

Additional components may include:

  • Impermeable membrane to prevent infiltration to soils below
  • Check dams

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Planning Considerations[edit]

Planning Content

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Design[edit]

Design Content

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Performance[edit]

Performance Content

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Incentives and Credits[edit]

In Ontario

City of Mississauga
The City of Mississauga has a stormwater management credit program which includes RWH as one of their recommended site strategies[1].

LEED BD + C v. 4

SITES v.2


See Also[edit]


External Links[edit]


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