Civil Engineering :: Irrigation
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If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle θ with horizontal, the hydraulic mean depth is
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If water table is comparatively high, the irrigation canal becomes useless, due to
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A river is said to be of
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A land is said to be water-logged if its soil pores within
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In case of a trapezoidal notch fall
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If D1 and D2 are depths of water upstream and down stream of a hydraulic jump, the loss of head at the jump, is
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If Dc is the critical depth, D is the depth of water down stream and HL is the total head loss at the cistern of a vertical fall, the depth x of the cistern below the bed level down stream suggested by Blench, is
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The uplift pressure on the roof of an inverted syphon, is maximum when
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In rigid module, the discharge
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The ratio of the rate of change of discharge of an outlet and parent channel, is known as
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A.
top width of the notch is kept between 3/4 th of full water depth above the sill of the notch |
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B.
top length of the piers should not be less than their thickness |
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C.
splay up stream from the notch section is 45° |
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D.
splay down stream from the notch section is 22 \( \frac { 1 } { 2 }^0\) |
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E.
all the above. |