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Line 378:
Line 378: − + − *<math>C</math> is the site runoff coefficient, − *<math>i</math> is the rainfall intensity, and; − *<math>A</math> is the drainage area)
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;Rational method
;Rational method
;rational method
;rational method
:<math>Q = CiA</math>:
: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.)
;RWH
;RWH