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Irrigation Engineering

Irrigation Engineering
Which of the following canal outlets maintains a constant discharge ?

non-modular outlet
flexible outlet
rigid module
None of these

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Irrigation Engineering
S-hydrograph is used to obtain unit hydrograph of

both (A) and (B)
None of these
shorter duration from longer duration
longer duration from shorter duration

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Irrigation Engineering
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is

5V²/2R
2V²/√3 R
2V²/5R
3V²/4R

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Irrigation Engineering
Hydrodynamic pressure due to earthquake acts at a height of

4H/3π below the water surface, where H is the depth of water
3H/4π above the base
3H/4π below the water surface
4H/3π above the base

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Irrigation Engineering
If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is

10 cm
20 cm
25 cm
15 cm

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Irrigation Engineering
Garnett's diagrams are used for graphical solution of design equations of a canal by

Lindlay theory
Gibb's theory
Kennedy's theory
Lacey's theory

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