If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

Irrigation Engineering
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

t = (h - 1)/(G + t)

t = (h + 1)/(G + t)

t = (h + 1)/G

t = (h - 1)/(G - t)

t = (h - 1)/(G + t)

t = (h + 1)/(G + t)

t = (h + 1)/G

t = (h - 1)/(G - t)

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Irrigation Engineering
The most suitable location of a canal head work, is

Trough stage of the river

Delta stage of the river

Boulders stage of the river

Rock stage of the river

Trough stage of the river

Delta stage of the river

Boulders stage of the river

Rock stage of the river

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Irrigation Engineering
The main cause of meandering is

the extra turbulence generated by the excess of river sediment during floods

degradation

None of these

presence of an excessive bed slope in the river

the extra turbulence generated by the excess of river sediment during floods

degradation

None of these

presence of an excessive bed slope in the river

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Irrigation Engineering
A 70% index of wetness means

rain deficiency of 70%

rain excess of 30%

rain deficiency of 30%

None of these

rain deficiency of 70%

rain excess of 30%

rain deficiency of 30%

None of these

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Irrigation Engineering
If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

Q = 1.71 BD

Q = 1/71 BD2/3

Q = 1.71 BD1/2

Q = 1.71 BD3/2

Q = 1.71 BD

Q = 1/71 BD2/3

Q = 1.71 BD1/2

Q = 1.71 BD3/2

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Irrigation Engineering
If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be

30 minutes

20 minutes

15 minutes

60 minutes

30 minutes

20 minutes

15 minutes

60 minutes

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Irrigation Engineering

Irrigation Engineering If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

Irrigation Engineering The most suitable location of a canal head work, is

Irrigation Engineering The main cause of meandering is

Irrigation Engineering A 70% index of wetness means

Irrigation Engineering If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

Irrigation Engineering If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be

Irrigation Engineering
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

Irrigation Engineering
The most suitable location of a canal head work, is

Irrigation Engineering
The main cause of meandering is

Irrigation Engineering
A 70% index of wetness means

Irrigation Engineering
If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

Irrigation Engineering
If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be