Changes

*''C'' = Runoff coefficient of impervious contributing drainage area (e.g., 0.9 for asphalt)  

*''C'' = Runoff coefficient of impervious contributing drainage area (e.g., 0.9 for asphalt)  

*''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]])}}  

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''R'' = ''A_i''/''A_p''

''R'' = ''A_i''/''A_p''