Changes

*''n'' = Porosity of the stone bed aggregate material (typically 0.4 for 50 mm dia. [[reservoir aggregate|clear stone]])}}  

*''n'' = Porosity of the stone bed aggregate material (typically 0.4 for 50 mm dia. [[reservoir aggregate|clear stone]])}}  

It is important to note that R should not exceed 2 to limit hydraulic loading and help avoid premature clogging.  Also important to note is that the contributing drainage area should not contain pervious areas that are sources of sediment that can lead to premature clogging.  

It is important to note that R should not exceed 1 to limit hydraulic loading and help avoid premature clogging.  Also important to note is that the contributing drainage area should not contain pervious areas that are sources of sediment that can lead to premature clogging.  

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Then increase A_r accordingly to keep R between 0 and 2, which reduces hydraulic loading and helps avoid premature clogging.

Then adjust A_r accordingly to keep R between 0 and 1, which reduces hydraulic loading and helps avoid premature clogging.

Back to [[Permeable pavements]]

Back to [[Permeable pavements]]

[[Category:Calculations]]

[[Category:Calculations]]