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Irrigation Engineering

Irrigation Engineering
Dimensions of coefficient of transmissibility are

M°L°T°
M° L2 T1
rvfL’T”1
M’LV

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Irrigation Engineering
A hydraulic structure is designed to withstand

All of these
Seepage forces
Hydraulic pressure
Hydraulic jump

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Irrigation Engineering
The Lacey's regime velocity is proportional to

R2/3 S1/2
R1/2 S3/4
Q3/4 S1/3
R3/4 S1/3

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Irrigation Engineering
Seepage through foundation in an earthen dam is controlled by providing

chimney drain
impervious cut off
rock toe
horizontal blanket

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Irrigation Engineering
The main function of a divide wall is to

provide smooth flow at sufficiently low velocity
prevent river floods from entering the canal
control the silt entry in the canal
separate the undersluices from weir proper

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Irrigation Engineering
If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is

R (θ + tan θ)
R (θ + cos θ)
2R (θ + tan θ)
2R (θ + cos θ)

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