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Posted By: aravindsri Member Level: Gold Posted Date: 02 Jun 2008
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2006 Indira Gandhi National Open University (IGNOU) B.Tech Civil Engineering ET536B Hydraulic Structures II December 2006 Question paper
IGNOU ET536B Hydraulic Structures II December 2006
B.Tech. Civil (Water Resources Management)
Term-End Examination
ET536B: Hydraulic Structures II
Time: 3 hours
Maximum Marks: 70
Note: Attempt any five questions. All questions carry equal marks. Use of calculators is permitted.
December 2006
1. (a) Draw a typical layout of a canal distribution system and explain the functions of its various parts. (7)
(b) What do you mean by cross drainage works? Explain their necessity. (7)
2. (a) Using Lacey's basic regime relations, show that P = 4.75 root(Q) where all the terms have their usual meaning. (7)
(b) Design an irrigation channel in alluvial soil according to Lacey's silt theory, given the following data: (7)
Longitudina slope of channel S = 1 / 4900
Lacey's silt factor f = 1.00
Channel side slopes, S = 1/2 : 1
3. (a) Explain the advantages and disadvantages of concrete lining (7)
(b) Explain the circumstances under which Sarda type fall is best suited. Also describe its salient features. (7)
4. (a) What do you mean bv sensitivitv of an outlet? Show that sensitivity (S) and flexibility (F) can be expressed as s = n F (7)
(b) Explain the various design parameters of an outlet. Discuss the significance of each. (7)
5. (a) Describe the functions of a cross regulator. (7)
(b) How would you orient a canal offtake to minimise Silt entry into the canal? (7)
6. (a) Describe the particular river training measures required for stabilisation of a river channel. (7)
(b) Explain the measures of controlling floods in a river. (7)
7. Differentiate between the following: (4x3 1/2)
(a) Watershed and Side slope canals
(b) Kennedy's and Lacey's silt theory
(c) Canal and Distributory Head Regulator
(d) Levees and Flood walls
8. Write short notes on the following : (4 x 3 1/2)
(a) Canal Alignment
(b) Sediment Transport
(c) Methods of River Training
(d) Design of Guide Banks
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