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Irrigation Engineering

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

chemical water
capillary water
hydroscopic water
gravity water

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Irrigation Engineering
The difference in level between the top of a bank and supply level in a canal, is called

Berm
Free board
None of these
Height of bank

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Irrigation Engineering
For the design of major hydraulic structures on the canals, the method generally preferred to, is based on

Electrical analogy method
The relaxation method
Khosla's method of independent variables
Bligh's theory

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Irrigation Engineering
For the upstream face of an earthen dam, the most adverse condition for stability of slope is

steady seepage
during construction
sudden drawdown
sloughing of slope

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Irrigation Engineering
According to Kennedy, the critical velocity (V₀) in meters in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).

V₀ = 0.55 mD0.64
V₀ = 0.84 mD0.54
V₀ = 0.55 mD0.54
V₀ = 0.84 mD0.64

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Irrigation Engineering
The useful storage is the volume of water stored in the reservoir between

minimum pool level and normal pool level
normal pool level and maximum pool level
river bed and minimum pool level
minimum pool level and maximum pool level

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