A short reach of a 2 m wide rectangular open channel has its bed level rising in the direction of flow at a slope of 1 in 10000. It carries a discharge of 4 m³/s and its Manning's roughness coefficient is 0.01. The flow in this reach is gradually varying. At a certain section in this reach, the depth of flow was measured as 0.5 m. The rate of change of the after depth with distance, dy/dx, at this section is (use g = 10 m/s²).

A short reach of a 2 m wide rectangular open channel has its bed level rising in the direction of flow at a slope of 1 in 10000. It carries a discharge of 4 m³/s and its Manning's roughness coefficient is 0.01. The flow in this reach is gradually varying. At a certain section in this reach, the depth of flow was measured as 0.5 m. The rate of change of the after depth with distance, dy/dx, at this section is (use g = 10 m/s²).

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A rectangular flume 2 m wide carries discharge at the rate of 2 m³/s. The bed slope of the flume is 0.0004. At a certain section the depth of flow is 1 m. Calculate the distance of the section downstream where the depth of flow is 0.9 m. Solve by single step method. Assume rugosity coefficient as 0.014. Is the slope of the channel mild or steep? How is this type of surface profile Classified ?
EXAMPLE 1: Determine the normal discharge for the channel shown in Fig 2.7a. The water surface in the left flood plain is 42m wide and that in the right flood plain is 26m. The manning roughness value for the flood plain is 0.10, while the Manning roughness value for the channel is 0.05 for the channel. The longitudinal slope of the channel is 0.0005. Solution: n=0.10 n=0.05 n3=0.10 2m 2m 5m 5m 12m 30m 15m 16m 10m 12m 12m Fig 2.7 a
A uniform flow occurs at a depth of 3.85m in a rectangular channel 11.5m wide with n=0.013 laid on a slope of 0.00274. What will be the minimum height “h" of a smooth hump, extending the entire width of the channel which can be built in the floor of this channel to produce critical depth at the hump. Use Manning's Formula. Figure 1: E.G.し. thamp
A trapezoidal is shown below. The particulars of the channel are as such: • Side slopes are 1 in 0.5 m. Manning's n = 0.015 • Slope of channel is 1 m in 1 km 0.5 b a. Using a value of 5 m for the bottom width and a normal depth of flow of 2 m, determin the following: i. ii. iii. Discharge Mean Velocity Reynolds No. b. If the discharge were 35 m³/s and bottom width was 5m, what would the normal depth of flow be? All other conditions remain the same.
Q- A rectangular open channel has a width of 5m and a bed slope of 0.001. For a uniform flow of depth 2m, the velocity is 2m/s. The Manning's roughness coefficient for the channel is.
A rectangular open channel has a width of 5 m and a bed slope of 0.001. For a uniform flow of depth 2 m, the velocity is 2 m/s. The Manning's roughness coefficient for the channel is (a) 0.033 (b) 0.017 (c)0.002 (d) 0.050 Hallint
For the channel (Consider a rectangular channel 3 m wide laid on a 1°slope. If the water depth is 2 m, the hydraulic radius is), if the water depth is 2 mand the uniform flow rate is 24 m3/s, what is the approximatevalue of Manning’s roughness factor n?(a) 0.015, (b) 0.020, (c) 0.025, (d ) 0.030, (e) 0.035
An earthen channel with a based 3 m wide and side slopes 1:1 carries water with a depth of 1m. The bed slope is 1 in 1600. Estimate the discharge. Take value of n as 0.04. 1m 1 N.T.S 3m
4: A discharge of 25 cumec occurs in a rectangular open channel 2.7m wide with bed slope of 0.003 and roughness, n=0.014. If the channel ends in a free outfall, calculate the depth at the brink, yn and critical depth, yc. Determine the shape of the water-surface profile for a distance of 120m upstream from the brink. Note: use a 0.10m water depth interval in the channel. Y1 = ? L=? Y2=? L=? Y3=? L=? Yc= ?
13. (LAB) A discharge of 25 m³/s is passing in a rectangular channel of bed width 8.0 meters and water depth 3.0 meters. The channel bed width is gradually contracted from 8.0 meters at section (1) to 6.0 meters at section (2). In the contraction zone, a smooth hump is placed in the channel in which the bed level is gradually increased by 1.00 m. Determine: (i) The change in water levels, (ii). The minimum height of hump so that y2 = ye, and (iii) The change in water levels if the hump height is 1.50 meter.
A 4 m wide rectangular channel, having bed slope of 0.001 carries a discharge of 16 m³/s. Considering Manning's roughness coefficient = 0.012 and g = 10 m/s², the cateogry of the channel slope is
The compound channel shown in the figure below has the following characteristics: b1 = 15 m, b2 = 50 m, n1 = 0.020, n2 = 0.035, and Z = 3m. The bottom slope is 0.001. Determine the discharge, Qfor the normal depth of 4 m in tne main channel.