A lined canal costs about 2 to 2.5 times as much as the unlined canal.

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Which of the following statement is wrong? (a)A lined canal is not susceptible to erosion

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Removal of silt considerably reduces the annual expenditure required on unlined channels for desilting.

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Which of the following is not an advantage of the lining of the canal?

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Design a lined canal to carry a discharge of 400 cumecs and slope is 1 in 6000. Take side slopes as 1 : 1 and rugosity constant as 0.012. Assume limiting velocity as 3 m/sec.

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Which of the following statement is wrong? (a)The velocity varies inversely with the Manning’s coefficient

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The capacity of the channel is a function of velocity.

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Lining decreases the channel capacity and consequently reduces the required channel section.

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What is the range of value of Manning’s coefficient for straight alignment for cast in-situ concrete lining?

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Calculate hydraulic mean depth for concrete-lined channel to carry a discharge of 350 cumecs at a slope of 1 in 5000. The value of manning’s constant for the lining is 0.015. The side slopes of a channel may be taken as 1.5:1. Assume limiting velocity in the channel as 2m/sec.

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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What costs are reduced with the help of lining a canal?

asked Aug 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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Design a lined canal carrying a discharge of 20 cumecs. The slope is 1 in 7000. Assume suitable values for side slopes and lining.

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The manning’s coefficient for a lined trapezoidal channel with a bed slope of 1 in 4000 is 0.014 and it will be 0.028 if the channel is unlined. The area in the case of the lined section is 19.04 m^2 and for the unlined section is 29.09 m^2. What percentage of earthwork is saved in a lined section relative to an unlined section, when a hydraulically efficient section is used in both the cases?

asked Jul 31, 2023 in Irrigation Engineering by Carter (75.2k points)

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What is the minimum value of free-board for Main and Branch Lined canals if the discharge is more than 10 cumecs as per specified by BIS code?

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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When the concrete lining is not reinforced in a channel, velocities up to 2.5 m/sec are permitted.

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Which of the following guideline is not recommended for the choice of lining when the bed width of the canal is up to 3 m?

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Depending on what factor does the lining of a canal can increase the capacity of the canal?

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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Mathematically, depending on what factor we can say velocity increases the capacity of the canal?

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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The permeability of lining is also governed by the depth of water in the canal and type of subgrade soil.

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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Which type of lining is only used for lining the side slopes of the canal?

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Calculate the central depth of a triangular channel section to carry a discharge of 15 cumecs. Consider the available slope as 1 in 9000. Assume the side slopes of the channel be 1.25:1 and manning’s constant is 0.015 for good brick work in lining.

asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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Which of the following statement is wrong about the requirement of good lining?

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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Which of the following statement is incorrect about Expansive soils?

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Which of the following is incorrect about the identification of CNS material?

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What is the recommended value of CNS thickness to be used for lining over expansive soil with swelling pressure of 200-300 KN/m^2?

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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The distance measured above the F.S.L and to the top of the lining is known as free-board.

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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