A most efficient trapezoidal section is required to give a maximum discharge of 21.5 m3/s of
water. The slope of the channel bottom is 1 in 2500. Taking C = 70 m1/2/s in Chezy’s equation, determine the
dimensions of the channel. Also determine the value of Manning’s n, taking the value of velocity of flow as
obtained for the channel by Chezy’s equation.
(solved),An irrigation channel is to carry a discharge of 14 cumec with a velocity of 0.9 m/s and bed slope of 1 in 2500. The side slopes are 1 to 1. Find the depth and bottom width. The values of Chezy’s C for this channel for different values of hydraulic radius R are as tabulated below. . . . . . . . . ‘ Hydraulic Radius R 0 7 0 8 0 9 1 0 1 1 1 2 1 3 1 4 Chezy s C 34 35 37 38 39 40 41 41
(Solved),Water flows at a uniform depth of 2 m in a trapezoidal channel having a bottom width 6 m, side slopes 2 horizontal to 1 vertical. If it has to carry a discharge of 65 m3/s, compute the bottom slope required to be provided. Take Manning’s n = 0.025.
(solved), A channel is 2m wide at bottom; the length of each sloping side is 1.95 m; the width at water surface is 5.5 m the flow depth 1.2 m; and bed slope 1 in 5280. What is the discharge per minute? The values of Chezy’s C for this channel for different values of hydraulic radius R are as tabulated below.
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