IRRIGATION ENGINEERING

 Imporant QUestion for GTU Exam

1.       Define: Water application efficiency, Water conveyance efficiency and water distribution efficiency

2.       Explain with neat sketch classification of soil-water in detail.

3.       What do you understand by scope of irrigation project?

4.       Define saturation capacity, field capacity and wilting point.

5.       Design a channel for discharge of 100 cumecs having maximum permissible velocity of 2 m/sec. The available bed slope is 1 in 2500. Assume Manning’s N = 0.013 & side slope is 1.1.

6.       Explain the terms (i) Duty (ii) Delta and (iii) Base period. Derive the relation between Duty, Delta and Base period.

7.       Describe with neat sketches various methods adopted for controlling seepage through the body of an embankment dam and through foundation.

8.       What is canal fall? Why is it necessary to provide a fall in a canal? Explain with sketch Ogee falls.

9.       With a neat line sketch, explain aqueduct.

10.   With the help of a neat sketch explain the working principle and utility of parshall flume in flow measurements of irrigation channels.

11.   Write design procedure for Sarda type of fall.

12.   Explain the Bligh’s creep theory with limitations and design criteria

13.   Discuss use of hydraulic jump, as an energy dissipation device in design of hydraulic structure.

14.   Differentiate aqueduct and canal syphon.

15.   Define a canal fall. Why is it necessary to provide a fall in a canal?

16.    Give the functions of cross regulator and head regulator.

17.   Discuss Khosala’s method of independent variables to design a weir.

18.   Using Bligh’s creep theory, calculate thickness of downstream floor at every 5 m from the downstream end. Also check whether the floor length is sufficient. Use the following details: (i) Length of upstream floor = 20 m (ii) Length of downstream floor = 30 m (iii) Head on upstream side = 4 m (iv) Head on downstream side = 0 m (v) Depth of upstream pile = 5 m (vi) Depth of downstream pile = 6 m (vii) Bligh’s Creep coefficient, C = 18 (viii) Weight density of concrete = 24 KN/m3

19.   Discuss canal escapes in brief.

20.   Discuss causes of water logging. What are the remedial measures for it?

21.   Differentiate between contour canal and ridge canal

22.   Give classification of various irrigation methods.

23.   Write short note on soil-water-plant relationships

24.   Compare drip and sprinkler irrigation systems with their advantages and disadvantages.

25.   What are the limitations of Kennedy’s theory?

26.   Write short note on canal alignment

27.   Define saturation capacity, field capacity and wilting point, crop ratio, overlap allowance, capacity factor and full supply coefficient, transpiration, evapotranspiration and consumptive use.

28.   With the help of a neat sketch illustrate the classification of canals based on their alignment. Explain for which alignment the number of cross drainage works will be 04 2 minimum and maximum respectively.

29.   With the help of neat sketches explain the working of the following components of a weir: silt excluder and fish ladder

30.   Draw neat sketches to explain canal cross section in cut, in fill and canal section partially in cut partially in fill. Obtain an expression for balancing depth in terms of section geometry.

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