1. Select the correct answer from the following:

If the depth of water is 8·64 cm on a field over a base period of 10 days, then the duty is

10 ha/cumec/sec

100 ha/cumec/sec

864 ha/cumec/sec

1000 ha/cumec/sec

Lysimeter and Tensiometer are used to measure, respectively, one of the following groups of quantities:

Capillary potential and Permeability

Evapotranspiration and Capillary potential

Velocity in channels and Vapour pressure

Velocity in pipes and Pressure head

In Lacey's regime theory, the velocity of flow is proportional to

Qf^2







For Delta in cm, Duty in ha/cumec and Base period in days are related as

Delta =864 B/D

B =864 D/Delta

B =864 Delta/D

D =8·64 B/Delta

For medium silt, where average grain size is 0·16 mm, Lacey's silt factor is likely to be

0·30

0·45

0·70

1·32

A tube-well having a capacity of 4 m^3/hr operates for 20 hours each day during the irrigation season. How much area can be commanded, if the irrigation interval is 20 days and depth of irrigation is 7cm

1·71 x 10^4 m^2

1·14 x 10^4 m^2

22·9 x 10^4 m^2

2·29 x 10^4 m^2

Acidic soils are reclaimed by

leaching of the soil

using limestone as a soil amendment

using gypsum. as a soil amendment

provision of drainage

Define run-off. Also discuss the various factors affecting run-off.

Explain the various types of irrigation, with a flow chart.

Explain unconfined and confined aquifers, with the help of neat sketches.

Discuss the advantages and disadvantages of lift irrigation over flow irrigation.

Discuss the drawbacks of Kennedy's and Lacey's silt theories.

Write short note on the following:

Weir

Barrage

Write a note on the classification of canals according to their alignment.

What is the necessity for providing canal lining? Discuss the various advantages and disadvantages of lining a canal.

Write short notes on the following:

Non-modular outlet

Flexible module outlet

Rigid modular outlet

What is meant by canal regulatory work Explain any two canal regulatory works in brief.

Discuss the various causes of failures of earth dams, with neat sketches.

Explain, in brief, well shrouding and well development.