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Hydrology & Irrigation

Introduction and Basic Assumptions of Unit Hydrograph

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Question

Viewing watershed as a system, which one of the following assumptions is made in the Unit Hydrograph theory?

A

Non-linearity

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B

Both linearity and time variance

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C

Both time invariance and non-linearity

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D

Both linearity and time invariance

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Solution

The correct option is D Both linearity and time invariance
The primary assumption of unit hydrograph theory is that rainfall has uniform distribution, both in space - with minimal variations across the basin - and in time; in other words, the rainfall rate does not vary much during the event.

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