Changes

==Calculate the maximum overall depth==

==Calculate the maximum overall depth==

*Step 1: Determine what the planting needs are and assign appropriate depth of media, using the table above.  

*Step 1: Determine what the planting needs are and assign appropriate depth of media, using the table above.  

*Step 2: Select an underdrain pipe diameter (typically 100 - 200 mm), assign this as an 'embedding' depth. *Note that this component does not apply if a downstream riser is being used to control an extended saturation zone.   

*Step 2: Select an underdrain perforated pipe diameter (typically 100 - 200 mm), assign this as an 'embedding' depth. *Note that this component does not apply if a downstream riser is being used to control an extended saturation zone.   

*Step 3: Calculate the maximum permissible reservoir storage depth beneath the underdrain perforated pipe (''d_{s, max}'', mm):

*Step 3: Calculate the maximum permissible reservoir storage depth beneath the underdrain perforated pipe (''d_{s, max}'', mm):

<math>d_{s, max}=f'\times t \times 1/n</math>

<math>d_{s, max}=f'\times t \times 1/n</math>