Changes

*''f''' = Design infiltration rate (mm/hr),

*''f''' = Design infiltration rate (mm/hr),

*''t'' = [[Drainage time]] (hrs). Check local regulations for drainage time requirements; and

*''t'' = [[Drainage time]] (hrs). Check local regulations for drainage time requirements; and

*''n'' = [[Porosity]] of the reservoir aggregate}}

*''n'' = Porosity of the reservoir aggregate}}

===Additional step for system without underdrain===

===Additional step for system without underdrain===