Fill in the missing data in the following table relating critical depth in trapezoidalchannels:Case(a)(b)(c)m1.52.01.52.0B(m)3.52.04.0(m)0.300.40Q(m²/s)5.02.641E(m)1.111

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Civil Engineering

Fill in the missing data in the following table relating critical depth in trapezoidal channels:

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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Concept explainers

Open Channel Flow

Open channel flow is a branch of fluid mechanics. It deals with the flow of fluid in an open conduit or free surface. In an open channel flow, gravity induces the flow of water whose surface is open to the air. This flow is free-falling rather than confined in rigid body conduits. The open channel flow depends upon two parameters that are the cross-section of the conduit and the velocity profile. Practical examples of open channel flow are streams, rivers, canals, and other drainage systems.In open channel flow, the cross-sectional area of at least one of the sides is exposed to air, and the surface of water faces atmospheric pressure. This flow is also known as free gravity flow. The cross-sectional area of the conduit can be either man-made or a natural channel. For instance, the flow in rivers and streams are natural conduits, and the flow in a canal and sanitary systems are man-made or engineered channels.

Question

Fill in the missing data in the following table relating critical depth in trapezoidal
channels:
Case
(a)
(b)
(c)
m
1.5
2.0
1.5
2.0
B
(m)
3.5
2.0
4.0
(m)
0.30
0.40
Q
(m²/s)
5.0
2.641
E
(m)
1.111

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QUESTION 1 A line of level 5 km long is run between BM1 and BM2 with an average backsight and foresight distances of of 227 and 229 meters, respectively. The average backsight reading is 1.99 meters and every time it is taken the rod is inclined backward from the vertical by 4.9°. What should be the corrected elevation of BM2, if its recorded elevation is 124 meters? NOTE: Answer in two decimal places