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Irrigation Engineering

Irrigation Engineering
The depth of rice root zone, is

90 cm
80 cm
60 cm
50 cm

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Irrigation Engineering
If D is the depth of scour below original bed, then the width of launching apron is generally taken as

2.0 D
2.5 D
1.2 D
1.5 D

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Irrigation Engineering
According to Lacey, in regime conditions

Both (a) and (b)
Silt is kept in suspension by vertical components of eddies
Entire cross-section of the channel is generated at all points by the forces normal to the
Neither (a) nor (b)

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Irrigation Engineering
The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than

10 cm
40 cm
30 cm
20 cm

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Irrigation Engineering
Hydrograph is the graphical representation of

rainfall and time
surface runoff and time
ground waterflow and time
runoff and time

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Irrigation Engineering
Infiltration capacity

changes with time
is a constant factor
changes with location
changes with both time and location

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