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mLine 51:
Line 51: − + − # Determine what the planting needs are and assign appropriate depth of media. − # Determine what the pipe diameter needs to be and assign appropriate depth of reservoir. − # Determine maximum possible storage reservoir depth (''d<sub>S</sub>''): − <math>d_{S}=f'\times38.4</math> − {{Plainlist|1=Where: − *''f''' = Design infiltration rate in mm/hr, and − *38.4 comes from multiplying desired drainage time of 96 hours by void ratio of 0.4}} − ''Then''
→Sizing without an underdrain pipe
*38.4 comes from multiplying desired drainage time of 96 hours by void ratio of 0.4}}
*38.4 comes from multiplying desired drainage time of 96 hours by void ratio of 0.4}}
==Sizing without an underdrain pipe==
===Additional step for system without underdrain===
# Determine maximum permissible ponding depth (''d<sub>P</sub>''):
# Determine maximum permissible ponding depth (''d<sub>P</sub>''):
<math>d_{P}=f'\times19.2</math>
<math>d_{P}=f'\times19.2</math>