For a constant area = 8 ft2 draw to scale the rectangular
sections with ratios of 1:1, 2:1, 3:1 4:1...

Question

For a constant area = 8 ft2 draw to scale the rectangular
sections with ratios of 1:1, 2:1, 3:1 4:1 and 5:1 of width to
height.
Calculate the wetted perimeter, hydraulic radius and flow
through these sections through an excavated uniform gravel section
if slope = .002. Which section conveys the most flow? Explain
conclusions.

Aditi · Accepted Answer

ANSWER
Given:  B * H = 8ft2
B = 1 = x
H    1    x
A = x * x = 8 = 2.828 ft
B = H = 2.828 ft
—-----------------------------------
B = 2 = 2x
H    1    x
A = 2x * x = 8 =>   x =  2 
B = 4 ft H = 2 ft
—-----------------------------------
B = 3 = 3x
H    1    x
A = 3x * x = 8 = 1.

For a constant area = 8 ft2 draw to scale the rectangular sections with ratios of 1:1, 2:1, 3:1 4:1 and 5:1 of width to height. Calculate the wetted perimeter, hydraulic radius and flow through these...

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