Difference between revisions of "Bioretention"

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
()
Line 38: Line 38:
 
----
 
----
  
===Planning Considerations===
+
===Planning considerations===
 
</div>
 
</div>
 
<div class="col-md-8">
 
<div class="col-md-8">
Planning Content
+
 
 +
 
 +
<h4>Design for maintenance</h4>
 +
Will the BMP be a snow storage facility in winter months?
 +
 
 +
 
 +
 
  
 
</div>
 
</div>

Revision as of 19:15, 28 June 2017

This article is about planted installations designed to capture surface runoff through an engineered soil with subterranean infrastructure.
For simpler, residential systems, see Rain gardens.
For linear systems, which convey flow, but are otherwise similar see Bioswales.

Overview[edit]

Bioretention cells are one of the most well recognized form of Low Impact Development. They can encompass all mechanisms of action: infiltration, filtration and evapotranspiration.

Bioretention cells are an ideal technology for:

  • Fitting functional vegetation into urban landscapes
  • Treating runoff collected from nearby impervious surfaces

The fundamental components of a bioretention cell are:

  • Biomedia: An engineered soil mix
  • Planting
  • Storage layer of coarse aggregate
Additional components may include:
  • Under-drain to redistribute or remove excess water
  • Impermeable membrane to prevent infiltration to soils below

<panelSuccess>

</panelSuccess>



Planning considerations[edit]


Design for maintenance

Will the BMP be a snow storage facility in winter months?



<panelSuccess>

</panelSuccess>


Design[edit]




Vegetation

For a detailed list of recommend plant species, see Plants for bioretention

  • The vegetation is a big opportunity to maximize the co-benefits of biodiversity and amenity. Planting plans can be formalized or naturalized to suit the surrounding style.
  • For resilient and robust planting, native species which can tolerate periods of drought and periodic inundation are recommended.
  • Woody and evergreen plants should be avoided in any areas of the bioretention cell to be used as snow storage.
  • Dense shrubby plants should be avoided in locations where the accumultion of trash is anticipated as a maintenance problem.

<panelSuccess>

</panelSuccess>


Performance[edit]

Performance Content

<panelSuccess>

</panelSuccess>


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]

[edit]

Variations

Overview

Design Guidance

BMP Sizing

Design Specifications

Construction Considerations

Inspection and Maintenance Needs

Life Cycle Costs

Case Studies

Typical Design Drawings

Supporting Material and External Resources




  SEND US YOUR QUESTIONS & FEEDBACK ABOUT THIS PAGE