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Irrigation Engineering

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

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

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Irrigation Engineering
Hydrograph is the graphical representation of

rainfall and time
surface runoff and time
runoff and time
ground waterflow and time

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Irrigation Engineering
Lining of irrigation channels

does not change the water logging area
increases the waterlogging area
decreases the waterlogging area
None of these

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Irrigation Engineering
Retrogression of the bed level of a river downstream a weir, occurs due to

Heavy impact of water
Soft soil strata
Less percentage of silt
Increase of the bed level

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Irrigation Engineering
The main function of a divide wall is to

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

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Irrigation Engineering
Side slopes generally kept for canals in loam soil, are:

1½ : 1 in cutting and 2 : 1 in filling
1 : 1 in cutting and 1½ : 1 in filling
Neither (A) nor (B)
Both (A) and (B)

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