c) A rectangular concrete channel has a broad crested weir at its downstream end similar tothat in Figure 3 below, the channel is 10 m wide, has a slope of Im/km and a Manning n=0.012. For a discharge of 150 m³/s,EszHi yıFigure 3 - Question 4i) Calculate the minimum height of the weir to produce critical flow (normal depth lies inthe range 3.5 - 3.6 m)ii) If Az = 0.5 m, calculate the upstream head, H1 and use Ca = 0.88.

The expression of velocity is given as V1=1nR23S12 V1=1nbynb+2yn23S12 Here n is the manning…

c) A rectangular concrete channel has a broad crested weir at its downstream end similar to that in Figure 3 below, the channel is 10 m wide, has a slope of 1m/km and a Manning n= 0.012. For a discharge of 150 m3/s.

c) A rectangular concrete channel has a broad crested weir at its downstream end similar to that in Figure 3 below, the channel is 10 m wide, has a slope of 1m/km and a Manning n= 0.012. For a discharge of 150 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

Related questions

Q: A rectangular channel 2.5 m of width has a discharge of 0.30 m/see which is measured by a right…

A: Given: Width of rectangular channel, b= 2.5m Depth of rectangular channel,= d= 1.251m Discharge,= Q=…

Q: oss-section is shown in Fig. below. The existing channe ith a Manning's (n=0.012), and it carries a…

Q: Q2(a) A river discharges flow at 2 m^3/s/m at depth of 1.1 m. A 0.25 m high broad-crested weir is…

A: Schematic diagram of the given problem:

Q: An existing channel is to be enlarged to increase its capacity. The enlarged channel cross-section…

A: Given: Manning’s coefficient n is 0.012. The existing discharge is 3 m3/sec. The total discharge…

Q: Determine the critical depth f

A: Given: A rectangular channel having Discharge, Q=200 m3/s width, B=10 m To find Critical depth,…

Q: Situation 2: A reservoir with vertical sides has a plan area of 560 x 106 sq.cm. If the discharge…

A: Given : Plan area of reservoir with vertical sides, A = 56000 m2Crest length of the trapezoidal…

Q: At a hydraulic jump, the flow depths are 0.4 m and 5 m at the upstream and downstream, respectively.…

A: Given data- Flow depths-y1=0.4 my2=5 mchannel is wide rectangular.To Find- The discharge per unit…

Q: An existing channel is to be enlarged to increase its capacity. The enlarged channel cross-section…

Q: A flood occurs in the main channel having a trapezoidal section with a base width of 4.5 m. If the…

A: Mean velocity V = 1.2 m/sBase width, B= 4.5 m

Q: Q7: A suppressed rectangular weir is to be built across a 4.5 m channel width to measure a flow rate…

A: width of channel =4.5mflow=1.2maximum water depth=1.2mFINDthe

Q: A triangular, sharp crested weir with end contraction of 1.4 m long and the upstream depth is 2.35.…

Q: A singly-contracted weir 2.5m high is located in a 10m wide rectangular channel with a measured…

A: Given Data:z=2.5mL=10mQ=2.3m3/s

Q: a trapezoidal weir with a side slope of 1H to 2.8V allows a flow rate of 51m^3/s Assuming a constant…

Q: ngular concrete Ch has a broad crested weir at its do ream end similar to that in Figure 4 below,…

A: Given, b =10 m n = 0.012 Q = 150 m3/s s = 0.001 Discharge though open channel is given byQ…

Q: d. Depth of water above the weir if P = 1.2m. dc d NSWER: a) Cw= 0.445, Q = 34.95m³/sec b) dc =…

Q: A 12 m high weir above riverbed is constructed with 1.0 m free board. The 5 km long water conveyance…

Q: A cipolletti weir has length of 2.0 m and head over the weir is 1 m. What is the discharge over the…

A: Length L=2 m Head H=1 m Coefficient of discharge Cd=0.62

Q: s to discharge 10.125 m3 /s of water onto an open channel. The weir factor Cw = 1.88. To what…

A: L=7.5mQ=10.125m3sCw=1.88d=1.8

Q: in the both end rectangular contracted weir, the length of the w neglecting velocity of approach and…

Q: Question A rectangular, sharp crested weir with end contractions is 1.85m long. How high should it…

Q: A trapezoidal channel (n = 0.022, m=2) with a bottom width of 5m carries a discharge of 45 m³/s at a…

Q: A trapezoidal weir has its non-parallel sides inclined at 4V:1H. It has a base of 4.54 m. and a head…

Q: Water flows through a parabolic weir that is 2m deep and 2m wide at the top under a constant head of…

A: Step 1

Q: Design a canal culvert 45 metres long to pass a normal full supply discharge of 5 m3/s with 0.lm…

A: Solution: Given Data: Length of culvert=45 m=147 ftQ=5 m3/s=176 cfsK1=0.1 mAssuming a flow velocity…

Q: A cipolleti weir is constructed across a trapezoidal channel. The discharge is estimated to be 3.50…

A: Given data- A cipolleti weir is constructed across a trapezoidal channel. Discharge (Q) = 3.50 m3/s…

Q: A triangular weir e/2=45 maintains its head at 400mm determine the flow over the weir in cms: *

A: For triangular weri Q=Cd815H522gtanθ2so,For theoretical Cd=1

Q: Determine the discharge flow over the suppressed weir considering a 500 mm head, if the rectangular…

Q: contracted weir 1.22 m long is placed in a rectangular channel 2.74 m wide. The height of the weir…

Q: 2. The depth of water over the weir was 5m. If the total discharge through the weir was 1,000,000…

A: Answer We are given depth of water over weir = 5 m total discharge over weir = 1000000 m3 side…

Q: A rectangular suppressed weir 1 m high extends across a rectangular channel 6m wide in which the…

Concept explainers

Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.

Question

100%

c) A rectangular concrete channel has a broad crested weir at its downstream end similar to
that in Figure 3 below, the channel is 10 m wide, has a slope of Im/km and a Manning n=
0.012. For a discharge of 150 m³/s,
Esz
Hi yı
Figure 3 - Question 4
i) Calculate the minimum height of the weir to produce critical flow (normal depth lies in
the range 3.5 - 3.6 m)
ii) If Az = 0.5 m, calculate the upstream head, H1 and use Ca = 0.88.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

a rectangulsr suppressed weir is placed on the side of a reservoir whose plan area is a constant 1038m2. when the weir is opened, the flow rate reaches elev 5.28m. eventually it reaches 4.77m. if the crest is situated at 4.43 when the weir is opened, how long it take to lower the depth flow to 4.77m? the weir is 1.3m long and has c=0.62
3. Water flows at a rate of 5 m3/s in a rectangular channel width of 10 m. The normal depth of flow in the channel is 5 m. If a sharp crested (suppressed) weir of height 5 m is installed across the channel, determine the new flow depth in the channel for the same flow rate. What would the flow depth be if the rectangular weir were contracted (on both sides) to a width if 7 m? What would the flow depth be if a 7 m wide Cippoletti weir is used?
3) b) The normal depth of flow in a 5.0 m wide rectangular channel shown in Figure 3 below is 1.0 m. The channel is laid at a slope of Im/km and has Manning's n of 0.02. Calculate the discharge and velocity in this channel associated with normal flow conditions. c) At a point downstream of that in part (b) above, there is a weir, Az is 0.5 m in height. If the section properties of the channel remains the same as in part (b), determine yı the depth of flow just before the weir. Assume negligible headloss across the weir and critical flow occurs over the weir. (yı lies between 1.2- 1.3 m) YA AZ Y2 Y2 for Q = const AZ Figure 3- Question 3 (b) and 3 (c)
A channel carrying 105.86 ft³/s. Assuming that an error of 0.05904 in is made in measuring the head, determine the resulting percentage of error in discharge. (a) If a 90º triangular weir is used. (b) If a Cipolletti Weir 10ft long is used. Draw the sketch
handwritten and fast
Q13: A sharp crested weir of Im height is fixed across 5m wide channel as shown in the following figure. The depth of flow on the upstream and downstream sides of the weir is 1.5m and 1.2m respectively. Find the discharge over the weir. y=15m H Water level W-1 m HA y = 1.2m
Compute the flow rate of each weir. Assume that Cd=0.60
A submerged sharp crested weir 0.75 m high extends across a rectangular channel 3 m wide. The depth of water in the channel of approach is 1.22 m and 20 m downstream from the weir the depth of water is 0.92 m. Determine the discharge on the submerged weir assuming the nappe remains on top. 1.22m 0.92m 0.75m 1.57 m^3/s 2.06 m^3/s 4.785 m^3/s 2.45 m^3/s 20m
32
A trapezoidal channel has a slope of 1 H to 2 V and the slope of the bed is 1 in 2000. The area of the section is 30 cm². Find the dimensions of the sections if it is economical. Determine the discharge of the most economical section if C = 60. EXAMPLE 13.4
= [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 broad crested weir in a reservoir is 8m wide and 1.20m high. If the upstream depth is 2.50m, slope is .0008, determine the discharged coef. and determine the discharge for a well-rounded upstream corner of the weir.