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|width = 210px|Berm height (mm)
|width = 210px|Berm height (mm)
|Sometimes referred to as the bowl depth
|Sometimes referred to as the bowl depth or ponding depth (e.g. 300 mm)
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|-
|Surface roughness (Manning’s n)
|Surface roughness (Manning’s n)
|-
|-
|Porosity (fraction)
|Porosity (fraction)
|Suggest range 0.35 – 0.4 unless otherwise tested
|Suggest [[Bioretention media storage|0.4]] unless otherwise tested
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|-
|Field capacity (fraction)
|Field capacity (fraction)
|-
|-
|Void ratio
|Void ratio
|Suggest range 0.35 – 0.4 unless otherwise tested
|Suggest value 0.4 unless otherwise tested
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|Seepage rate (mm/hr)
|Seepage rate (mm/hr)
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|-
|Clogging factor
|Clogging factor
|?
|Maybe up to 0.5 to account for some anticipated maturation.
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|Design drawdown time (hrs)
|Design drawdown time (hrs)