Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 2170609 Irrigation Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2170609 Date:16/05/2019
Subject Name:Irrigation Engineering
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define: Water application efficiency, Water conveyance efficiency and water
distribution efficiency.
03
(b) Explain with neat sketch classification of soil-water in detail. 04
(c) What do you understand by scope of irrigation project? 07
Q.2 (a) Define saturation capacity, field capacity and wilting point. 03
(b) 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.
04
(c) Explain the terms (i) Duty (ii) Delta and (iii) Base period. Derive the relation
between Duty, Delta and Base period.
07
OR
(c) Describe with neat sketches various methods adopted for controlling seepage
through the body of an embankment dam and through foundation.
07
Q.3 (a) Differentiate between weir and barrage. 03
(b) Give classification of various irrigation methods. 04
(c) With the help of neat sketches explain the working of the following
components of a weir: silt excluder and fish ladder.
07
OR
Q.3 (a) Explain classification of Irrigation canal in detail. 03
(b) What are the limitations of Kennedy?s theory? 04
(c) Describe Bligh?s Creep Theory for the design of weirs over pervious
foundation.
07
Q.4 (a) With a neat line sketch, explain aqueduct. 03
(b) With the help of a neat sketch explain the working principle and utility of
parshall flume in flow measurements of irrigation channels.
04
(c) What is canal fall? Why is it necessary to provide a fall in a canal? Explain
with sketch Ogee falls.
07
OR
Q.4 (a) Explain uplift forces and arrangements done in the gravity dam to release
uplift forces.
03
(b) Discuss in brief the causes and failure of earthen dams. 04
(c) Discuss the causes and remedial measures of water logging. 07
Q.5 (a) Explain the terms for canal cross-section. (i) Borrow pits, (ii) Spoil Banks,
(iii) Berm.
03
(b) Develop an expression for floor thickness of a weir to resist water pressure by
self weight.
04
(c) 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. Outlet
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2170609 Date:16/05/2019
Subject Name:Irrigation Engineering
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define: Water application efficiency, Water conveyance efficiency and water
distribution efficiency.
03
(b) Explain with neat sketch classification of soil-water in detail. 04
(c) What do you understand by scope of irrigation project? 07
Q.2 (a) Define saturation capacity, field capacity and wilting point. 03
(b) 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.
04
(c) Explain the terms (i) Duty (ii) Delta and (iii) Base period. Derive the relation
between Duty, Delta and Base period.
07
OR
(c) Describe with neat sketches various methods adopted for controlling seepage
through the body of an embankment dam and through foundation.
07
Q.3 (a) Differentiate between weir and barrage. 03
(b) Give classification of various irrigation methods. 04
(c) With the help of neat sketches explain the working of the following
components of a weir: silt excluder and fish ladder.
07
OR
Q.3 (a) Explain classification of Irrigation canal in detail. 03
(b) What are the limitations of Kennedy?s theory? 04
(c) Describe Bligh?s Creep Theory for the design of weirs over pervious
foundation.
07
Q.4 (a) With a neat line sketch, explain aqueduct. 03
(b) With the help of a neat sketch explain the working principle and utility of
parshall flume in flow measurements of irrigation channels.
04
(c) What is canal fall? Why is it necessary to provide a fall in a canal? Explain
with sketch Ogee falls.
07
OR
Q.4 (a) Explain uplift forces and arrangements done in the gravity dam to release
uplift forces.
03
(b) Discuss in brief the causes and failure of earthen dams. 04
(c) Discuss the causes and remedial measures of water logging. 07
Q.5 (a) Explain the terms for canal cross-section. (i) Borrow pits, (ii) Spoil Banks,
(iii) Berm.
03
(b) Develop an expression for floor thickness of a weir to resist water pressure by
self weight.
04
(c) 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. Outlet
07
2
factors for Rabi and rice may be assumed as 1800 ha/cumecs and 800
ha/cumecs. Also calculate delta for each case.
OR
Q.5 (a) Draw sectional view of a typical barrage. Compare different aspects of a weir
and barrage.
03
(b) Write design procedure for Sarda type of fall. 04
(c) Give a comparison of sub surface drainage and surface drainage used for land
reclamation.
07
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This post was last modified on 20 February 2020