Changes

This article is specific to [[bioretention]], vegetated systems that infiltrate water to the native soil. <br>

This article is specific to [[bioretention]], vegetated systems that infiltrate water to the native soil. <br>

If you are designing a planted system which does not infiltrate water, see advice on [[Planters: Sizing]].

If you are designing a planted system which does not infiltrate water, see advice on [[Planters: Sizing]].

[[File:Sizing Bioretention.jpg|thumb|The vertical storage zones in a bioretention cell include: ponding, mulch, filter media, choker course, pipe diameter reservoir and the storage reservoir.]]  

[[File:Sizing Bioretention.jpg|thumb|The vertical storage zones in a bioretention cell include: ponding, mulch, filter media, choker layer, embedded pipe diameter and the storage reservoir.]]  

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Many of the dimensions in a bioretention system can be predetermined according to the function of the component. There is greatest flexibility in the ponding depth and the depth of the storage reservoir beneath the optional underdrain pipe. The order of operations in calculating these dimensions depends on whether an underdrain is desired.   

Many of the dimensions in a bioretention system can be predetermined according to the function of the component. There is greatest flexibility in the ponding depth and the depth of the storage reservoir beneath the optional underdrain pipe. The order of operations in calculating these dimensions depends on whether an underdrain is desired.