Question

What are factors affecting manning's roughness coefficient?

Answer 1

The degree of roughness depends on several factors, the most important of which in open-channel flow aresurface roughness of the bed material, cross- section geometry, channel variations, obstruction to flow, typeand density of vegetation, and degree of channel meandering.

Answer 2

Factors affecting manning's roughness coefficient:

• When channel applies friction to a certain flow, then the manning roughness Coefficient comes into action.

• The roughness coefficient given by manning depends on various factors like the roughness of the bed Material, variations in channel, Density and type of vegetation involved, Cross section geometry, One channel is meandered to the degree to which it is done and last but most important is Open channel flow area surface changes.

These are all the factors that can affect the friction coefficient.

To know more:

The dimensions of manning's roughness coefficient (n) are

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