WATER RESOURCE AND HYDROLOGY
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Trapezoidal channel Question 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
Question 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
A channel carries a discharge Question A channel carries a discharge of 5 cumec with a flow depth 1 m. The side slopes are 1 to 1 and bed slope 1 in 3520. Find the bed width and the velocity. The values of Chezy’s C for this channel for different
An irrigation channel Question 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
Trapezoidal channel section Problem 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
Question An irrigation channel of trapezoidal section, having side slopes 3 horizontal to 2 vertical, is to carry a flow of 10 cumec on a longitudinal slope of 1 in 5000. The channel is to be lined for which the value of friction coefficient in Manning’s formula is n =
Problem on rectangular section Question 15.5, State the conditions under which the rectangular section of an open channel will be most economical. Derive these conditions. Solution
Question 6 An open channel is to be constructed of trapezoidal section and with side slopes 1 vertical to Find the proportions (i.e., relation between bottom width and depth of flow) for minimum excavation (i.e., best hydraulic section). If the flow is to be 2.7 cumec, calculate the bottom width
Question 5 Determine the most efficient section of a trapezoidal channel with side slopes 1 vertical to 2 horizontal, carrying a discharge of 11.25 m3 /s with a velocity of 0.75 m/s. What should be the bed slope of the channel? Take Manning’s n = 0.025 Solution More prblems