Download GTU BE/B.Tech 2018 Winter 7th Sem Old 170602 Irrigation Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem Old 170602 Irrigation Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (OLD) EXAMINATION ? WINTER 2018
Subject Code: 170602 Date: 19/11/2018

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.

Q.1 (a) Define duty and delta. Derive a relationship between duty and delta for a given
base period. Also briefly discuss factors affecting duty.
07
(b) Define diversion headwork. Describe the function of each component of
diversion head work with a neat diagram.
07

Q.2 (a) Differentiate between the following:
(i) Sprinkler Irrigation and Drip Irrigation
(ii) Weir and Barrage
07
(b) Explain various irrigation efficiencies. 07
OR
(b) Discuss classification of soil moisture. Also explain significance of field
capacity and permanent wilting point in deciding frequency of irrigation.
07

Q.3 (a) Explain Lacey?s silt theory. Using Lacey?s basic regime equations
derive an expression for scour depth.
07
(b) What do you mean by lining a canal? What are the advantages of it? 07
OR
Q.3 (a) Describe Khosla?s theory elaborating its salient features clearly with flownet. 07
(b) Discuss causes of failure of weirs and explain measures to prevent such
failures.
07

Q.4 (a) What do you mean by water logging of soil? How would you prevent it? 07
(b) A water course has CCA of 2600 hectares, out of which the intensities of
irrigation for perennial sugarcane and rice crops are 20% and 40% respectively,
The duty for these crops at the head of water course are 750 hect/cumec and 1800
hect/cumec respectively, Find the discharge required at the head of water course
if the peak demand is 20% higher than average requirement.
07
OR
Q.4 (a) Explain the necessity of canal fall.Why is the ?Cistern? provided below the canal
fall?
07
(b) Design an irrigation canal to carry discharge 5 cumecs. Take m=1.0, N= 0.0225,
and B/D ratio = 4.40.
07

Q.5 (a) Differentiate between the Aqueduct and siphon Aqueduct and mention
the functions of cross regulator.
07
(b) What are the different types of irrigation schemes? Discuss the salient features
of each.
07
OR

Q.5 (a) Write short note on
(1) Silt control devices (2) Canal escape
07
(b) Explain border strip method of irrigation with neat sketch. 07

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