A trapezoidal channel has a bottom width of B=5 m, sidewall slope of 1V:1H, and bed slope of S=0.004. The channel bottom is compact gravel with a mean diameter of d5o =26 mm and the sidewalls are concrete (n=0.013). Use Horton's equation to calculate the equivalent Manning constant. The total discharge for a water depth of 1.4 m is: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Q=14.5 m³/s b Q=18 m³/s dQ=16 m³/s

A trapezoidal channel has a bottom width of B=5 m, sidewall slope of 1V:1H, and bed slope of S=0.004. The channel bottom is compact gravel with a mean diameter of d5o =26 mm and the sidewalls are concrete (n=0.013). Use Horton's equation to calculate the equivalent Manning constant. The total discharge for a water depth of 1.4 m is: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Q=14.5 m³/s b Q=18 m³/s dQ=16 m³/s

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

None
A trapezoidal channel has a bottom width of 1m and side slopes of 2H:1V. If the depth of flow is 4 m, and the flow is 20 m³ /s, and n=0.014 find: a.) Specific energy (m) b.) Boundary shear stress (Pa)
A rectangular concrete channel (n = 0.014) has a bottom width of 5.05 m and a longitudinal slope of 0.002. Compute the discharge rate and velocity for a water depth of 2.34 m. Compute normal depth, critical depth, and critical slope for a discharge of 6.67 m³/s.
A rectangular open channel, with a constant discharge of 32m3/s, has a smooth expansion from (1) to (2) as shown in figure Q2 in the flow direction. At (1) the channel is 3.6m wide and the water depth is 2.4m . At (2) the water depth is 0.8m. Determine the channel width at (2), stating any assumptions made.
A very wide rectangular channel is designed to carry a discharge of 5 m³/s per meter width. The design is based on the Manning's equation with the roughness coefficient obtained from the grain size using Strickler's equation and results in a normal depth of 1.0 m. By mistake, however, the engineer used the grain diameter in mm in the Strickler's equation instead of in meter. What should be the correct normal depth? (a) 0.32 m (c) 2.00 m (b) 0.50 m (d) 3.20 m
= [a Q/gb], where Q is the (a) Show that the critical depth for rectangular channels is expressed by y. discharge, b is the channel width, and a is the energy coefficient. (b) A half trapezoid flood drainage channel (Fig. 3b) has a flow of 100 m³/s. If the flow depth upstream of the 0.2 m step-rise is 4 m, what is the depth at an immediately downstream section of the 0.2 m step- rise? Assume there are no losses in the transition. Also compute the flow depth at the a very far downstream end if the flood drainage channel ends in a free overfall. (c) For a symmetrical compound channel section (Fig. 3c), compute the n., α, and S, based on the assumption that the depth of flow in the section is 5 m; the flood plains and the main channel have the same bottom slope of 0.001; and roughness coefficient for the main channel and the flood floodplains are respectively 0.021 and 0.039.
a. A rectangular channel is 4 m wide and has a longitudinal slope of 0.002. The channel is poured concrete and it is discharging a uniform flow at 25 m3/s. What is the normal depth? Use Table C-4 for the roughness coefficient. Table C-4. Average Manning Roughness Coefficients for Larger Open Channels Channel Manning Roughness Coefficient(n) Unlined Channels Clay Loam Sand Lined Channels Grass Lined (well maintained) Grass Lined (not maintained) Wetland-Bottom Channels (New Channel) 0.023 0.020 0.035 0.045 0.023 Wetland-Bottom Channels (Mature Channel) See Table A-5 Riprap-Lined Channels See Chapter 7, Section 7.6.17 Concrete (Poured) 0.014 Air Blown Mortar (Gunite or Shotcrete)(¹) 0.016 Asphaltic Concrete or Bituminous Plant Mix 0.018 (¹) For air blown concrete, use n=0.012 (if troweled) and n=0.025 if purposely roughened. Note: For channels with revetments or multiple lining types, use composite Manning roughness coefficient based on component lining materials.
Calculate the depth d in which the discharge (Q = 1.5 m / sec) will flow through the channel with trapezoid - shaped cross section. Width of the channel bed is (b = 2 m), slope of bed (S = 0.05%), sides slope is (Z = 1.5). The channel is excavated in gravel sends in which the roughness coefficient is (n = 0.0247).
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