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Then adjust A<sub>p</sub> accordingly to keep R, the ratio of impervious contributing drainage area to water storage reservoir (i.e., permeable pavement) area, between 0 and 2 to reduce hydraulic loading and avoid premature clogging.   
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Then increase A<sub>r</sub> accordingly to keep R, the ratio of impervious contributing drainage area to water storage reservoir (i.e., permeable pavement) area, between 0 and 2 to reduce hydraulic loading and avoid premature clogging, assuming A<sub>r</sub> = A<sub>p/sub>.   
       
Back to [[Permeable pavements]]
 
Back to [[Permeable pavements]]
 
[[Category:Calculations]]
 
[[Category:Calculations]]

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