Determine whether a 1.5 m × 1.5 m reinforced concrete box culvert with 45° flared wing-walls and beveled edge at top of inlet carrying a 50-ycar flow rate of 5.4 m³/s will operateunder inlet or outlet control for the following conditions. Assume k, = 0.5.Design headwater elevation (EL,,) = 31.5 mElevation of stream bed at face of invert = 29.87 mTailwater depth = 1.43 mApproximate length of culvert = 60 mSlope of stream - 1.5%n- 0.012

Procedure: first, calculate the flow rate per width Then calculate the required headwater and…

Answered: Determine whether a 1.5 m × 1.5 m…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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2.1. A trapezoidal channel conveys 15 m³/s of water on a bed slope of 1 in 300. The base width of the channel is 5 m and the side slope is 2 m. Assume a Manning's roughness coefficient (n) of 0.018. Calculate: (a) Calculate the normal flow depth and discharge. (b) Calculate Reynold's and Froude Numbers. (c) Comment on the applicability of Manning's Equation.
A 1.5 m diameter culvert (concrete barrel, well-rounded entrance) that is 20 m long is installed at a slope of 2%. The design discharge is 9.5 m^3/s and the inlet will be submerged but not the outlet (assume Type B culvert). Determine the depth that will result upstream (i.e. headwater depth, HW) during the design flood event. Hint: assume hL ACTUAL = hL ALLOW.
discharge = 2.40 m^3/sec velocity = 1.5 m/sec Given that the rectangular-shaped timber flume has the best hydraulic cross-section, 1. Determine the depth of flow and width of flow. 2. Determine what grade it should have. If b = 2.7 meters, y = 0.6 meters, and n = 0.012 3. Determine the percentage less flow that the timber flume would carry.
A uniform flow occurs in a 4.1m diameter circular concrete culvert, but the depth changes depending on the weather (due to storms). The Manning coefficient is n = 0.013, and the channel slope is So = 0.0003. What is the discharge in m3/s when the depth of flow is 3.5m?
2) For a rectangular open channel the following information is given: Discharge, Q=125 m³/s, cross-section width, b = 10 m, Manning roughness coefficient n = 0.025, channel bottom slope So = 0.00015. Determine: a) Uniform flow depth, yn. (For the first iteration assume yn = 10 m) b) State of the flow. c) Resistance to the flow, t. 个 yn ↓ IK 3-91
Question 4. L a) A (3.0 + X) m wide rectangular channel carries water at 20°C at a depth of 0.75 m. The channel is laid on a slope of 0.0004. Find the hydrodynamic nature of the surface if the channel is made of (a) very smooth concrete and (b) rough concrete. Also estimate the discharge for both the cases using Manning's formula. Consider that the equivalent roughness height for very smooth concrete is 0.25 mm and for rough concrete is 3.5 mm. Where, X = 0.01 x Last Three Digit of your Student ID b) Compute the normal depth and velocity in a trapezoidal channel whose bottom width is (6 + X) m and side slope is 1.75: 1. The discharge of the channel should be maintained 33 m/s. Consider that the value of Manning's n is 0.025 and bed slope is 0.0031. Where, X 0.01 x Last Three Digit of your Student ID
4) Two box culverts each is 0.61 m by 0.61 m and has n = 0.013, Ke = 0.05, Cd = 0.85, L = 30 m, So = 0.7%, and HW = 1.5 m. What is the design flow capacity (m³/s) for tailwater of TW = 0.84 m? Answer:
Compute the size of a square concrete box culvert (n = 0.013) to handle a discharge of 1,000 cfs. The culvert will have a length of 250 ft with a slope of 0.02 and a maximum headwater depth (H) of 20.0 ft. Use a square-edged entrance (K a free outlet condition (y₁ < D). 0.5) and en =
3. A culvert with a headwall is to be laid through a road embankment at the natural stream slope of 0.004. The inlet invert is set at an elevation of 20.5 m and the maximum allowable headwater elevation is 23.0 m. The length of the culvert is100 m and the tailwater elevation is 22.0 m. Check to see whether a 1500 mm (width) by 1200 mm (depth) twin box culvert is sufficient to allow a design discharge of 6.0 m3/s to pass through the culvert. If so, sketch the most likely flow conditions at the inlet and outlet of the culvert.
ta triple concrete box culvert 1.5 m by 3.7 m (n=0.012) conveying a discharge of 46m3/s operates under outlet control. The culvert has a length of 32 m, slope of 0.75 percent, and 45-degree wingwalls with square edge. Tailwater depth is 1.25. Find the headwater depth
The specific discharge in a horizontal and rectangular channel is q = 1.44 m2/s and the water depth is y1 = 1.28 m. What is maximum hump elevation without chocking effect? a) 0.65 m b) 0.55 m c) 0.5 m d) 0.45 m
(a) A trapezoidal channel has a bottom width of Bw = 10 m and 1 vertical to z=2m horizontal. The channel has a slope of 0.0001 and a Manning's roughness of n = 0.0501. If the uniform flow depth is yn = 7m what is the discharge in the channel? (b) Compute the critical depth (yc) for this trapezoidal channel given discharge from (a)

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