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Irrigation Engineering

Irrigation Engineering
If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle ? with horizontal, the hydraulic mean depth is

D
D/3
D/5
D/2

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Irrigation Engineering
Regime conditions in a channel may occur if

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

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Irrigation Engineering
Hydrograph is the graphical representation of

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

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Irrigation Engineering
The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be

70mm
90 mm
105 mm
80mm

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Irrigation Engineering
A deficit of sediments in flowing water may cause a river

Meandering type
Aggrading type
Sub-critical type
Degrading type

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Irrigation Engineering
If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is

1700
1600
1400
1500

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