The ordinates of a 3-hour unit hydrograph for a catchment are given in table below
Time(h)01234Ordinatem3/s05122541
The ordinate of a 6 hour unit hydrograph for this catchment at the time instant of 4 hours would be______m3/s
23
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Solution
The correct option is A 23 TimeOrdinate ofOrdinate of 3h-UhAdditionOrdinate of 6h-UH(hr)3h-UH lagged by 3 hoursA+B=A+B2(A)(B)00−0015−52.5212−12632502512.5441546235−121266−252512.57−414120.5