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Input data:
{|class="wikitable"
|+ Inputs
|-
!style="background: darkcyan; color: white"|Symbol
!style="background: darkcyan; color: white"|Units
!style="background: darkcyan; color: white"|Parameter
|-
|D||hrs||Duration of design storm (for MOECC volume based caclulations set to 1)
|-
|i||mm/hr||Intensity of design storm (for MOECC volume based calculations use whole storm depth (link to map))
|-
|q||mm/hr||Infiltration coefficient, calculated from measured [[Infiltration: Testing| infiltration rate]] and applied [[Infiltration|safety factor]]
|-
|n||-||Porosity, as measured (or default to 0.35)
|-
|I||m<sup>2</sup>||Impermeable area i.e. catchment
|-
|d||m||depth of Infiltration facility or BMP
|-
|P||m2<sup>2</sup>||Permeable area i.e. area of the facility or BMP
|}
*The applicable infiltration coefficient (''q'') is calculated by applying a [[Infiltration: Testing|safety factor to the measured infiltration rate]].
*The applicable infiltration coefficient (''q'') is calculated by applying a [[Infiltration: Testing|safety factor to the measured infiltration rate]].
*Determine the impervious catchment area (''I''), and outline the location of the bioretention facility. To begin with, budget for at least 10% of the total catchment area to be required for the BMP. The area of the facility on the ground will be 'P' (pervious).
*Determine the impervious catchment area (''I''), and outline the location of the bioretention facility. To begin with, budget for at least 10% of the total catchment area to be required for the BMP. The area of the facility on the ground will be 'P' (pervious).