Design a most economic trapezoidal section of an irrigation canal
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![Design a most economic trapezoidal section of an irrigation canal
Page 2 of 4
passing through non-alluvial soil having the following data.
Assume reasonable values of bed slope and freeboard for the canal.
Discharge of the canal = 20 cumec
Permissible mean velocity = 0.85 m/s
Bazin's constant, K = 1.3
Side slope = 1.5:1
Also calculate the percentage of earthwork can be saved if the canal
is to be constructed as a lined one. Consider K=0.5 for the lined
section. Given equation, A= 2.088 D² and P-4.176D for 1.5H:1V
lined sections. Bazin's formula, C=87/(1+K/VR)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F76abae01-7697-438b-b5c3-7458c230a25e%2Ff242dffa-ab0e-4a8b-b894-9d3508f1914c%2Foy04nc_processed.png&w=3840&q=75)
Transcribed Image Text:Design a most economic trapezoidal section of an irrigation canal
Page 2 of 4
passing through non-alluvial soil having the following data.
Assume reasonable values of bed slope and freeboard for the canal.
Discharge of the canal = 20 cumec
Permissible mean velocity = 0.85 m/s
Bazin's constant, K = 1.3
Side slope = 1.5:1
Also calculate the percentage of earthwork can be saved if the canal
is to be constructed as a lined one. Consider K=0.5 for the lined
section. Given equation, A= 2.088 D² and P-4.176D for 1.5H:1V
lined sections. Bazin's formula, C=87/(1+K/VR)
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Step 1: Given variable parameter
VIEWStep 2: Determination of hydraulic radius
VIEWStep 3: Determination of depth and width of the canal
VIEWStep 4: Determination of hydraulic radius for lined channel
VIEWStep 5: Determination of depth and width of the canal
VIEWStep 6: Calculation of earthwork
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