Changes

* Step 6: Multiply the depth of each separate component by the void ratio and then sum the total to find the 1 dimensional storage (in mm).

* Step 6: Multiply the depth of each separate component by the void ratio and then sum the total to find the 1 dimensional storage (in mm).

* Step 7: Calculate the required total storage (m³):

* Step 7: Calculate the required total storage (m³):

<math>Storage=RVC_T\times A_c\times0.095</math>

<math>Storage=RVC_T\times A_c\timesC\times0.1</math>

{{Plainlist|1=Where:

{{Plainlist|1=Where:

*''RVC_T'' is the Runoff volume control target (mm),

*''RVC_T'' is the Runoff volume control target (mm),

* ''A_c'' is the catchment area (Ha), and

*''A_c'' is the catchment area (Ha),

*''C'' is the runoff coefficient of the catchment area, and

* 0.095 is the product of a typical runoff coefficient for impermeable surfaces (0.95) and the units correction between m³ and mm.Ha. (0.1)}}

* 0.095 is the product of a typical runoff coefficient for impermeable surfaces (0.95) and the units correction between m³ and mm.Ha. (0.1)}}

* Step 8. Divide required storage (m³) by the 1 dimensional storage (in m) to find the required footprint area (A_p) for the bioretention in m².  

* Step 8. Divide required storage (m³) by the 1 dimensional storage (in m) to find the required footprint area (A_p) for the bioretention in m².