Calculate the minimum slope on which the channel shown in figure below must be laid if it is to carry 1.416 m3/s of water with a depth of 0.61 m. The sides and bottom of the channel are made of formed, unfinished concrete. -2.44 m 0.61 m -1.22 m
Calculate the minimum slope on which the channel shown in figure below must be laid if it is to carry 1.416 m3/s of water with a depth of 0.61 m. The sides and bottom of the channel are made of formed, unfinished concrete. -2.44 m 0.61 m -1.22 m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Calculate the minimum slope on which the channel shown in figure
below must be laid if it is to carry 1.416 m3/s of water with a depth of
0.61 m. The sides and bottom of the channel are made of formed, unfinished concrete.

Transcribed Image Text:Calculate the minimum slope on which the channel shown in figure
below must be laid if it is to carry 1.416 m3/s of water with a depth of
0.61 m. The sides and bottom of the channel are made of formed,
unfinished concrete.
-2.44 m-
0.61 m
1.22 m

Transcribed Image Text:Typical design values of roughness coefficient (n) for artificial channels and natural streams
Channel Description
n
|Glass, copper, plastic, or other smooth surfaces
Smooth, unpainted steel, planed wood
0.010
0.012
Painted steel or coated cast iron
0.013
Smooth asphalt, common clay drainage tile, trowel-finished concrete, glazed brick
Uncoated cast iron, black wrought iron pipe, vitrified clay sewer tile
Brick in cement mortar, float-finished concrete, concrete pipe
Formed, unfinished concrete, spiral steel pipe
0.013
0.014
0.015
0.017
Smooth earth
0.018
Clean excavated earth
0.022
Corrugated metal storm drain
Natural channel with stones and weeds
Natural channel with light brush
Natural channel with tall grasses and reeds
0.024
0.030
0.050
0.060
Natural channel with heavy brush
0.100
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