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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

V₀1/2
V₀3/2
V₀7/2
V₀5/2

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Irrigation Engineering
Silt excluders are constructed on the

river bed upstream of head regulator
canal bed upstream of head regulator
river bed downstream of head regulator
canal bed downstream of head regulator

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Irrigation Engineering
To hold hydraulic jumps, baffle walls are provided in

Sarda type falls
English type falls
Montague type falls
Vertical type falls

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Irrigation Engineering
In case of a trapezoidal notch fall

Splay upstream from the notch section is 45°
Top length of the piers should not be less than their thickness
All listed here
Splay downstream from the notch section is 22½°

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Irrigation Engineering
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

Spaced at interval of 1½ times their heights
Of R.C.C. or steel plate 8 cm thick
Of height ⅓rd to ¼th the depth of water in the main canal
All listed here

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Irrigation Engineering
The water stored in the reservoir below the minimum pool level is called

useful storage
surcharge storage
valley storage
dead storage

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