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Elementary Engineering Hydrology by M. J. Deodhar

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7

Runoff

ChapterOutline

7.1 DEFINITION

‘Runoff’ is that part of precipitation that appears in a drainage channel as surface flow in a perennial or an intermittent form. It is that part of water, which can be used for engineering purposes and hence is also known as yield of catchment.

The yield from a catchment is generally expressed in terms of volume, in a season or a year.

Fig. 7.1

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