CEA Final Review Storm Water Runoff Correct 100%

CEA Final Review Storm Water Runoff
Correct 100%
Where does storm water go? - ANSWERRivers, creeks, and reservoirs.



Development impact on storm water runoff: - ANSWERrunoffafter - runoffbefore



Return Period - ANSWERAverage length of time between

storms of a given duration and depth.



Has a 1% chance of occurring in any given year. - ANSWER100 year storm



The Rational Formula: - ANSWERQ = C*i*A



Q - ANSWERPeak runoff rate (cubic feet/sec)



C - ANSWERRunoff coefficient (dependent on surface type).



i - ANSWERRainfall intensity (inches/hour).



A - ANSWERArea in acres.



Rational Formula (recurrence adjustment) - ANSWERQ = Cf*Ci*A.



Cf - ANSWERRunoff coefficient adjustment factor.



intensity - ANSWERdepth/duration



Has a 10% chance of occurring in any given year. - ANSWER10 year storm