Which one of the following is not essential to derive the formula used in constructing a synthetic unit hydrograph ?

Which one of the following is not essential to derive the formula used

1.	Which one of the following is not essential to derive the formula used in constructing a synthetic unit hydrograph ?
A.	Time to peak
B.	peakflow
C.	Inter flow
D.	Time lease
Answer» D. Time lease

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Which one of the following is not essential to derive the formula used in constructing a synthetic unit hydrograph ?

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