Changes

;Rational method

;Rational method

;rational method

;rational method

:This formula is used to calculate peak rates of runoff when designing drainage LID BMPs in urban area. It is useful in estimating runoff on relatively small areas (roofs, parking lots, medians, road right-of-ways, etc.)

:<math>Q = CiA</math>:  

*<math>Q = CiA</math>:  

*<math>C</math> is the site runoff coefficient,  

**<math>C</math> is the site runoff coefficient,  

*<math>i</math> is the rainfall intensity, and;  

**<math>i</math> is the rainfall intensity, and;  

*<math>A</math> is the drainage area)

**<math>A</math> is the drainage area)

;RWH

;RWH