consider the compound channel shown inFigure (1). The Manning's coefficient forthe left side, main channel, the right side is0.04, 0.016, and 0.05, respectively. If thelongitudinal slope for the channel is 0.001and the flow depth is 4mCalculate:1-The equivalent Manning's coefficientusing the Pavlovskii method2-The freeboard.3-The average shear stress along thewetted perimeter in N/m2.4-Is the flow supercritical or subcriticalLeft sideRight sideSide slope 1%Main channelSide slope 4%3mNot to scale30 m

Given : Manning's coefficient for Left side = 0.04 Main channel = 0.016…

consider the compound channel shown in Figure (1). The Manning's coefficient for the left side, main channel, the right side is 0.04, 0.016, and 0.05, respectively. If the longitudinal slope for the channel is 0.001 and the flow depth is 4m

consider the compound channel shown in Figure (1). The Manning's coefficient for the left side, main channel, the right side is 0.04, 0.016, and 0.05, respectively. If the longitudinal slope for the channel is 0.001 and the flow depth is 4m

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

consider the compound channel shown in
Figure (1). The Manning's coefficient for
the left side, main channel, the right side is
0.04, 0.016, and 0.05, respectively. If the
longitudinal slope for the channel is 0.001
and the flow depth is 4m
Calculate:
1-
The equivalent Manning's coefficient
using the Pavlovskii method
2-
The freeboard.
3-
The average shear stress along the
wetted perimeter in N/m2.
4-
Is the flow supercritical or subcritical
Left side
Right side
Side slope 1%
Main channel
Side slope 4%
3m
Not to scale
30 m

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