If the unit hydrograph for a catchment is known, what is the first step to obtain the direct runoff hydrograph (DRH) for a given actual storm event?

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Computer · Hydrology

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Convert the total rainfall depth to effective or direct runoff depth by subtracting losses

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Answer 1

Find the peak discharge time of the hydrograph

Answer 2

Compute and add the base flow to the unit hydrograph

Answer 3

Convert the total rainfall depth to effective or direct runoff depth by subtracting losses

Answer 4

Apply the S-curve method directly to adjust the duration

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