The unit hydrograph of a catchment is derived assuming uniform rainfall excess over the entire basin for a specific duration. If the rainfall duration is doubled while keeping rainfall intensity constant, which of the following statements is correct?

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Computer · Hydrology

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

A new unit hydrograph of the doubled duration must be derived.

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Answer 1

The peak discharge doubles.

Answer 2

The base duration halves.

Answer 3

The ordinates increase but the peak discharge reduces.

Answer 4

A new unit hydrograph of the doubled duration must be derived.

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