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→Calculate the total depth of the practice, dT
* 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.<br>
* 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 without an underdrain in locations constrained in the vertical dimension, consider decreasing filter media depth (and plant types) and/or catchment impervious area.<br>
For practices without an underdrain in locations constrained in the vertical dimension, consider decreasing filter media depth (and supported plant types) and/or catchment impervious area.<br>
For practices with an underdrain in locations constrained in the vertical dimension, consider installing perforated pipe on the bottom of the storage reservoir and including a riser (saves the depth of aggregate needed to embed the pipe), and/or decreasing filter media depth (and plant types), ponding depth and/or catchment impervious area.
For practices with an underdrain in locations constrained in the vertical dimension, consider installing perforated pipe on the bottom of the storage reservoir and including a riser (saves the depth of aggregate needed to embed the pipe), and/or decreasing filter media depth (and supported plant types), ponding depth and/or catchment impervious area.
==Determine the required surface area of the practice==
==Determine the required surface area of the practice==