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The section factor and hydraulic depth for a rectangular channel are 40m and 4m respectively. Determine the top width of the channel.

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+1 vote
in Fluid Mechanics by (118k points)
The section factor and hydraulic depth for a rectangular channel are 40m and 4m respectively. Determine the top width of the channel.

(a) 3m

(b) 4m

(c) 5m

(d) 6m

This question was posed to me in semester exam.

This is a very interesting question from Geometrical Properties of Rectangular Section topic in division Flow in Open Channels of Fluid Mechanics

1 Answer

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Best answer
Right option is (c) 5m

To explain I would say: Section factor (Z) = A√D

40 = A√4 ; A = 20m^2

A = (Depth) (Width)

Width = 5m.

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