An isolated 3-h rainfall event on a small catchment produces a hydrogr – McqOptions

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1.	An isolated 3-h rainfall event on a small catchment produces a hydrograph peak and point of inflection on the falling limb of the hydrograph at 7 hours and 8.5 hours respectively, after the start of the rainfall. Assuming, no losses and no base flow contribution, the time of concentration (in hours) for this catchment is approximately
A.	8.5
B.	7
C.	6.5
D.	5.5
Answer» E.

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