Download GTU B.Tech 2020 Summer 8th Sem 2170609 Irrigation Engineering Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 8th Sem 2170609 Irrigation Engineering Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? VIII EXAMINATION ? SUMMER 2020
Subject Code: 2170609 Date:27/10/2020
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) Define Gross command area, Intensity of irrigation and
03
Time factor.

(b) List Various Irrigation Efficiencies and explain any three.
04

(c) Describe irrigation and write history of irrigation
07
development in India.
Q.2 (a) What are the factors considered for ideal site for diversion
03
head works.

(b) Write a note on moisture distribution pattern and
04
uniformity coverage for sprinkler irrigation system.

(c) Describe causes of failure of weirs and their remedies.
07


OR


(c) What is the consumptive Irrigation Requirement (CIR)?
07
State the different factors affecting it.
Determine the Consumptive use and Field Irrigation
requirement (FIR) for a rabi crop from the following data:
(i)
Consumptive Use Coefficient (K) = 0.76
(ii)
Total Pan Evaporation during the season (Ep)
= 58.5 cm
(iii)
Total Effective Rainfall (Re) = 5.5 cm
Take water application efficiency a = 85 %. Assume
other losses like leaching etc. are absent.
Q.3 (a) What are the limitations of Bligh's creep theory?
03

(b) Write a short note on: Exit Gradient and its importance.
04

(c) Discuss in brief the causes and failures of earthen dam.
07


OR

Q.3 (a) Explain in brief impervious membrane type of rock fill
03
dam.

(b) Discuss in brief the factors governing selection of type of
04
dam.

(c) Describe Bligh's Creep Theory for the design of weirs
07
over pervious foundation
Q.4 (a) What are draw backs of Lacey's Silt theory.
03

(b) Write a note on Losses in canals.
04

(c) Design an irrigation channel by Kennedy's theory to carry
07
a discharge of 45 cumec. Take N = 0.0225 and m = 1.05.
Bed slope is 0.2m per kilometer.

OR

Q.4 (a) Explain : Berm, free board, Dowla.
03

(b) Write procedure for design of non-alluvial channel.
04
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(c) Give difference between Kennedy's and lacey's theory.
07
Q.5 (a) Draw a neat sketch of Distributary head regulator.
03

(b) Discuss the effects of water logging.
04

(c) Describe with the help of neat sketches the various types
07
of cross drainage works.


OR
Q.5 (a) What are canal escapes? What is the need of it?
03
(b) Explain : Ogee, Notch fall.
04
(c) Write a note on land reclamation.
07

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