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Question
A peak flow of a flood hydrograph due to a six hour storm is 470 m3/s. The corresponding average depth of rainfall is 8 cm. Assume an infiltraion loss of 0.25 cm/hour and a constant base flow of 15 m3/s. What is the peak discharge of 6 hour unit hydrograph for this catchment?
A.
60 m3/s
B.
70 m3/s
C.
80 m3/s
D.
90 m3/s
Answer ( Option B)

70 m3/s

Solution

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