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Irrigation Engineering

Irrigation Engineering
If V₀ is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to

V₀5/2
V₀1/2
V₀7/2
V₀3/2

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Irrigation Engineering
Regime conditions in a channel may occur if

Channel flows uniformly in incoherent alluvium as that transported in suspension
All listed here
Silt grade and silt charge are constant
Discharge is constant

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Irrigation Engineering
When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called

Syphon-aqueduct
Aqueduct
Syphon
Super passage

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Irrigation Engineering
The relation between probability (P) and recurrence interval (T) is given by

P/T = 1
PT2 = 1
P/T2 = 1
PT = 1

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Irrigation Engineering
The best unit duration of storm for a unit hydrograph is

1 hour
one-fourth of basin lag
one-half of basin lag
equal to basin lag

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Irrigation Engineering
If water table is comparatively high, the irrigation canal becomes useless, due to

Large amount of seepage
All of these
Water logging of the cultivated areas
Uncertain water demand

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