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Irrigation Engineering Practice Test: Sediment Transport and Irrigation Channels Design
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Sediment Transport and Irrigation Channels Design topics include: Irrigation canal design capacity, sediment load, bed and suspended load and also their measurements, sediment transport importance and its mechanics, non scouring design methods, india stable channels, irigation canal cross section and maintenance.   Sediment transport: Understanding the behavior and transport of sediment is important for designing irrigation systems. For example, sediment transport in irrigation canals can affect the sustainability of an irrigation system. Unwanted erosion or deposition can lead... Show more
Irrigation Engineering Practice Test: Sediment Transport and Irrigation Channels Design
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25 Questions

1. Calculate the quantity of bed load transport by using Meyer and Peter formula if the effective tractive force that causes bed load transportation is 2.5 N/m2.
2. Which of the following is not a reason which leads to a canal breach?
3. Calculate the corresponding hydraulic mean depth that would exist in the channel if the bed was unrippled. The rugosity coefficient in an unrippled channel is 0.015 and the rugosity coefficient actually observed by experiments on the rippled bed of channel is 0.020. Consider the value of hydraulic mean depth of the channel as 1.5 m.
4. What is range of side slopes for a canal in cutting?
5. Which structure is provided when the disposition of earth becomes costlier?
6. What is the most important point to be considered while fixing the canal capacity?
7. On increasing velocity beyond the threshold stage of motion, the bed develops ____________ shape.
8. On what condition does the resistance equations of Chezy’s formula and manning’s formula are applicable?
9. Which one is the correct expression for Shield’s entrainment function?
10. Calculate the ratio of the tractive critical stress to the average shear stress if the water flows at a depth of 0.8 m in a wide stream having a bed slope of 1 in 3000. The median diameter of the sand bed is 2 mm.
11. Which type of force is needed for suspension of suspended load in flowing water?
12. What is the limitation of the Shield’s expression?
13. Calculate the critical tractive stress if the median diameter of the sand bed is 1.0 mm.
14. The shear stress required to move grain on the side slopes is less than the shear stress required to move the grain on the canal bed.
15. What minimum value of shear stress is needed to move the sediment?
16. Design of alluvial channels in India is based on Kennedy and Lacey theories.
17. Calculate the Manning’s rugosity coefficient in a coarse alluvium gravel with D-75 size of 5 cm.
18. By how much percentage canal capacity is increased to meet peak demands?
19. Determine the shear stress required to move the single grain on the side slopes, if the critical shear stress required moving the similar grain on the horizontal bed is 2.91 N/m2. Consider the angle of the side slope with the horizontal as 30° and the angle of repose of soil as 37°.
20. The scouring and silting on the river banks raise the flood levels for the particular discharge.
21. A wide unlined channel carrying silt-free water has a depth of 2.0 m. The maximum slope that can be given to a channel is 1 in 10,000. Calculate the maximum tractive stress permissible on the bed to prevent scouring.
22. Determine the discharge required at the head of the distributary in a canal where Kharif area to be irrigated is 2400 hectares and Rabi area to be irrigated is 1800 hectares, for fulfilling maximum crop requirement. Assume suitable values for kor depth and kor period.
23. The sediment confined along and above the bed up to a depth ‘2d’ (d being grain size) is treated as bed load.
24. Whose equation was the first on the rate of bed load transport?
25. Which of the following statement is not correct about Einstein’s theory?