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|width = 210px|Berm height (mm)
|width = 210px|Berm height (mm)
|Sometimes referred to as the bowl depth
|Ponding depth, maximum (e.g. 300 mm), sometimes referred to as 'bowl depth'
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|Surface roughness (Manning’s n)
|Surface roughness (Manning’s n)
|Depth of filter media
|Depth of filter media
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|Porosity (fraction)
|Porosity of filter media
|Suggest range 0.3 – 0.35 unless otherwise tested
|Suggest [[Bioretention media storage|0.35]] unless otherwise tested
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|Field capacity (fraction)
|Field capacity (fraction)
|Suggested value 0.03 <ref name = SWMM/>
|Suggested value 0.03 <ref name = SWMM/>
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|Conductivity (mm/hr)
|Hydraulic conductivity (mm/hr)
|Suggested range 25 – 250 mm/hr
|Suggested range 25 – 250 mm/hr
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|Depth of storage aggregates layer
|Depth of storage aggregates layer
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|Void ratio
|Porosity of storage reservoir aggregate
|Suggest value 0.4 unless otherwise tested
|Suggest value 0.4 unless otherwise tested
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|Maybe up to 0.5 to account for some anticipated maturation.
|Maybe up to 0.5 to account for some anticipated maturation.
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|Design drawdown time (hrs)
|Design [[drainage time]] (hrs)
|Also known as '[[drainage time]]'
|Maximum permissible time to fully drain the storage reservoir.
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!colspan = "2" align = center"|'''Drain (underdrain)'''
!colspan = "2" align = center"|'''Drain (underdrain)'''