Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem New 2170609 Irrigation Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2170609 Date: 28/11/2019
Subject Name: Irrigation Engineering
Time: 10:30 AM TO 01:00 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) Derive the relation between duty and delta. 03
(b) Define: (i) field capacity (ii) permanent wilting point (iii) ultimate
wilting point (iv) available moisture
04
(c) What is consumptive use of water? Describe any one method in
detail.
07
Q.2 (a) define : (i) crop ratio (ii) paleo (iii) capacity factor 03
(b) List various irrigation efficiencies and explain any two. 04
(c) A canal takes off from a reservoir. Data for irrigated crops are given
in table below.
Sr.
No.
Name of crop Base
Period
(days)
Area
under
crop (ha)
Duty at the
head of the
canal
(ha/cumecs)
1 Bajri(monsoon) 120 6500 2500
2 Jwar (Rabi) 120 5000 1500
3 Sugarcane 280 500 600
4 Sugarcane (overlap)
(HW)
100 250 600
5 Vegetable (HW) 120 500 700
Compute discharge required at the head of the canal. Time factor is
0.65 and capacity factor is 0.8 Assume losses as 20%
07
OR
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2170609 Date: 28/11/2019
Subject Name: Irrigation Engineering
Time: 10:30 AM TO 01:00 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) Derive the relation between duty and delta. 03
(b) Define: (i) field capacity (ii) permanent wilting point (iii) ultimate
wilting point (iv) available moisture
04
(c) What is consumptive use of water? Describe any one method in
detail.
07
Q.2 (a) define : (i) crop ratio (ii) paleo (iii) capacity factor 03
(b) List various irrigation efficiencies and explain any two. 04
(c) A canal takes off from a reservoir. Data for irrigated crops are given
in table below.
Sr.
No.
Name of crop Base
Period
(days)
Area
under
crop (ha)
Duty at the
head of the
canal
(ha/cumecs)
1 Bajri(monsoon) 120 6500 2500
2 Jwar (Rabi) 120 5000 1500
3 Sugarcane 280 500 600
4 Sugarcane (overlap)
(HW)
100 250 600
5 Vegetable (HW) 120 500 700
Compute discharge required at the head of the canal. Time factor is
0.65 and capacity factor is 0.8 Assume losses as 20%
07
OR
2
(c) A certain crop is grown in an area of 4000 hectares which is fed by
a canal system. The data pertaining to irrigation are :
Field capacity of soil = 25%
Optimum moisture = 12%
Permanent wilting point = 10%
Effective depth of root zone = 80cm
Relative density of soil = 1.4
If the frequency of irrigation is 10 days and overall efficiency is 23%
, find (i) the daily consumptive use (ii) the water discharge in m3/sec
required in the canal.
07
Q.3 (a) What should be the objective of a good method of application of
water?
03
(b) Give the classification of various methods of irrigation. 04
(c) Explain the salient features of the sprinkler irrigation system. 07
OR
Q.3 (a) What are contour laterals? 03
(b) What are the advantages of furrow irrigation? 04
(c) Explain the salient features of the drip irrigation system. 07
Q.4 (a) Draw the layout of a canal system. 03
(b) What are the requirements of good lining material? 04
(c) Design an irrigation channel by Kennedy?s theory to carry a
discharge of 8 cumecs. Take m=1.0, N=0.0225, and B/D ratio=5.0
07
OR
Q.4 (a) What is leaching? 03
(b) What are the ill effects of water logging? 04
(c) The bed slope of a regime channel is 1 in 6000. Determine the
channel section and discharge. The average particle size is 0.323mm
07
Q.5 (a) What are scouring sluices? Why it is provided? 03
(b) Draw a neat sketch of vertical drop weir. 04
(c) Describe Bligh?s creep theory for the design of weir over pervious
foundation.
07
OR
Q.5 (a) What is fish ladder? Why it is provided? 03
(b) What is canal fall? Why is it necessary to provide a fall in a canal? 04
(c) Explain with neat sketch aqueduct and siphon aqueduct 07
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This post was last modified on 20 February 2020