Changes

* Step 6: Select an underdrain perforated pipe diameter (typically 100 - 200 mm), assign this as an 'embedded' depth equal to the pipe diameter. *Note that this component does not apply if a downstream riser is being used to create the storage reservoir.   

* Step 6: Select an underdrain perforated pipe diameter (typically 100 - 200 mm), assign this as an 'embedded' depth equal to the pipe diameter. *Note that this component does not apply if a downstream riser is being used to create the storage reservoir.   

* Step 7: Sum total depth of bioretention components, and compare to available space (i.e. depth) between the proposed surface grade and the seasonally high water table or top of bedrock elevations in the practice location.  

* Step 7: Sum total depth of bioretention components, and compare to available space (i.e. depth) between the proposed surface grade and the seasonally high water table or top of bedrock elevations in the practice location.  

* Step 8: Adjust component depths to maintain a separation of 1.0 metre between base of the practice and seasonally high water table or top of bedrock elevation, or a lesser or greater value based on groundwater mounding analysis.  See below and [[Groundwater]] for more information.

* Step 8: Adjust component depths to maintain a separation of 1.0 metre between base of the practice and seasonally high water table or top of bedrock elevation, or a lesser or greater value based on groundwater mounding analysis.  See below and [[Groundwater]] for more information.<br>

For practices with an underdrain, consider decreasing filter media depth (and plant types), ponding depth or catchment area.

==Determine the required surface area of the practice==

==Determine the required surface area of the practice==