The measure to remove water logging of land, is to reduce percolation from canal

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Question
The measure to remove water logging of land, is
Options
A. to reduce percolation from canals and water courses
B. to increase outflow from the ground water reservoir
C. both (a) and (b)
D. neither (a) nor (b)

Correct Answer

both (a) and (b)

Irrigation problems

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4. Pick up the correct statement from the following
Options
A. Approach of the water line in a flumed channel section should not be steeper than
B. Departure of the water line from a flumed channel section should not be steeper than 30�
C. Approach of the water line should not be steeper than 30� and departure line not steeper than in a flumed channel section
D. Approach and departure of the water line in a flumed channel section, should not be steeper than

5. The saturation line is the line up to which banks get saturated after the canal runs for some time. The saturation gradient in ordinary loam soil, is generally
Options
A. 2 : 1
B. 3 : 1
C. 4 : 1
D. 5 : 1
E. 6 : 1

8. For a given discharge in a channel, Blench curves give the relationship between the loss of head (H_L) and
Options
A. specific energy up-stream
B. specific energy down-stream
C. critical depth of water down-stream
D. depth of water down-stream

9. Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
Options
A. populated area
B. alkaline area
C. forest area
D. fallow land.

10. The sinuosity of a meander is the ratio of
Options
A. meander length and the width of meander
B. meander length and half width of the river
C. curved length and the straight distance
D. none of these.

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