Download GTU BE/B.Tech 2019 Summer 7th Sem New 2170609 Irrigation Engineering Question Paper

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Subject Code: 2170609

GUJARAT TECHNOLOGICAL UNIVERSITY

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. 1. Define: Water application efficiency, Water conveyance efficiency and water distribution efficiency. [MARKS 03]

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   2. Explain with neat sketch classification of soil-water in detail. [MARKS 04]
   3. What do you understand by scope of irrigation project? [MARKS 07]
2. 1. Define saturation capacity, field capacity and wilting point. [MARKS 03]
   2. 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. [MARKS 04]

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   3. Explain the terms (i) Duty (ii) Delta and (iii) Base period. Derive the relation between Duty, Delta and Base period. [MARKS 07]

   OR

   1. Describe with neat sketches various methods adopted for controlling seepage through the body of an embankment dam and through foundation. [MARKS 07]
3. 1. Differentiate between weir and barrage. [MARKS 03]

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   2. Give classification of various irrigation methods. [MARKS 04]
   3. With the help of neat sketches explain the working of the following components of a weir: silt excluder and fish ladder. [MARKS 07]

   OR

   1. Explain classification of Irrigation canal in detail. [MARKS 03]
   2. What are the limitations of Kennedy’s theory? [MARKS 04]

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   3. Describe Bligh’s Creep Theory for the design of weirs over pervious foundation. [MARKS 07]
4. 1. With a neat line sketch, explain aqueduct. [MARKS 03]
   2. With the help of a neat sketch explain the working principle and utility of parshall flume in flow measurements of irrigation channels. [MARKS 04]
   3. What is canal fall? Why is it necessary to provide a fall in a canal? Explain with sketch Ogee falls. [MARKS 07]

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   OR

   1. Explain uplift forces and arrangements done in the gravity dam to release uplift forces. [MARKS 03]
   2. Discuss in brief the causes and failure of earthen dams. [MARKS 04]
   3. Discuss the causes and remedial measures of water logging. [MARKS 07]

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5. 1. Explain the terms for canal cross-section. (i) Borrow pits, (ii) Spoil Banks, (iii) Berm. [MARKS 03]
   2. Develop an expression for floor thickness of a weir to resist water pressure by self weight. [MARKS 04]
   3. The GCA for an irrigation canal is 20,000 hectares out of which 75% is CCA. The intensity of irrigation is 40% for Rabi and 10% for rice. If kor period is 4 weeks for Rabi and 2.5 weeks for rice, determine the outlet discharge. Assume outlet discharge factor for Rabi and rice as 1800 ha/cumecs and 1500 ha/cumecs. Also calculate delta for each case. [MARKS 07]

   OR

   1. Draw sectional view of a typical barrage. Compare different aspects of a weir and barrage. [MARKS 03]

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   2. Write design procedure for Sarda type of fall. [MARKS 04]
   3. Give a comparison of sub surface drainage and surface drainage used for land reclamation. [MARKS 07]

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