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Irrigation Engineering

Irrigation Engineering
The water utilizable by plants is available in soils mainly in the form of

gravity water
capillary water
chemical water
hydroscopic water

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Irrigation Engineering
The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by

period of storm
direct runoff volume
None of these
total rainfall

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Irrigation Engineering
The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be

20 m3/sec
30 m3/sec
35 m3/sec
25 m3/sec

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Irrigation Engineering
A hyetograph is a graphical representation of

rainfall depth and time
cumulative rainfall and time
rainfall intensity and time
discharge and time

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Irrigation Engineering
A river training work is generally required when the river is

Aggrading
Degrading
Meandering
All of these

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Irrigation Engineering
Main purpose of mean water training for rivers is

To provide sufficient depth of water in navigable channels, during low water periods
To preserve the channel in good shape by efficient disposal of suspended and bed load
All of these
Flood control

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