Civil Engineering :: Irrigation
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If A is the area of the surface, x is the depth of its C.G. from the surface of the water and ω is the density of water, then
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V and R are the regime mean velocity and hydraulic mean depth respectively in metres. Lacey's silt factor f is
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Pick up the correct statement from the following
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According to Kennedy, the critical velocity (V0) in metres 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).
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According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is
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The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be moe than
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The field capacity of a soil depends upon
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Finally formed berms in canals are provided for
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An outlet is said to be proportional if its flexibility, is
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The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is
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A.
Escapes are essential safety valves in a canal system |
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B.
The capacity of escapes should not be less than the capacity of the canal at its location |
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C.
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D.
The escapes are aligned to take advantage of contours of lower values |
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E.
All the above. |
