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==Overview==
 
==Overview==
Bioretention systems may be the most well recognized form of [[low impact development]] (LID). They can fit into any style of landscape and utilize all of the treatment mechanisms: [[infiltration]], filtration, attenuation and [[evapotranspiration]].
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Bioretention systems may be the most well recognized form of [[low impact development]] (LID). They can fit into any style of landscape and utilize all of the stormwater treatment mechanisms: [[infiltration]], filtration, attenuation and [[evapotranspiration]].
 
{{textbox|Bioretention is an ideal technology for:  
 
{{textbox|Bioretention is an ideal technology for:  
*Fitting functional vegetation into urban landscapes  
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*Fitting multi-functional vegetation into urban landscapes  
 
*Treating runoff collected from nearby impervious surfaces}}
 
*Treating runoff collected from nearby impervious surfaces}}
 
'''The fundamental components of a bioretention cell are:'''
 
'''The fundamental components of a bioretention cell are:'''
 
*A surface ponding area
 
*A surface ponding area
 
*A filter bed containing a [[Bioretention: Filter media| filter media]]
 
*A filter bed containing a [[Bioretention: Filter media| filter media]]
*An [[Bioretention: Internal water storage| internal water storage reservoir]] composed of a [[reservoir aggregate]] layer, and may include embedded void-forming structures.
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*An [[Bioretention: Internal water storage| internal water storage reservoir]] composed of a [[reservoir aggregate]] layer, and may include embedded void-forming structures to minimize depth and conserve aggregate, and organic material derived from untreated wood (aids in dissolved nitrogen removal).
 
*[[Plant lists|Plants]], and  
 
*[[Plant lists|Plants]], and  
 
*A filter bed surface cover layer (e.g. [[mulch]] and [[stone]])
 
*A filter bed surface cover layer (e.g. [[mulch]] and [[stone]])
 
'''Additional components may include:'''  
 
'''Additional components may include:'''  
 
*An [[underdrain]] to redistribute or remove excess water
 
*An [[underdrain]] to redistribute or remove excess water
*Filter media [[additives]] intended to enhance retention of nutrients, metals, hydrocarbons or bacteria.
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*Filter media [[additives]] intended to enhance retention of nutrients, metals, petroleum hydrocarbons and/or bacteria.
    
==Planning considerations==
 
==Planning considerations==

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