Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2174001 Irrigation And Water Resources Engineering Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2174001 Date:19/01/2021
Subject Name:Irrigation and Water Resources Engineering
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1
(a) Define capillary water, hygroscopic water & gravitational
03
water in soil.
(b) Enlist Recording and Non-Recording Rain gauges. Describe
04
one Non-recording Rain-gauge.
(c) Describe limitation of Kennedy's theory of canal in alluvial
07
soil
Q.2
(a) Write the application of Unit Hydrograph
03
(b) Describe
04
1.Confined Aquifer
2.Unconfined Aquifer
(c) Explain Base flow separation form hydrograph to estimate the
07
volume of direct run-off
Q.3
(a) Enlist types of cross-drainage structures
03
(b) What is Lane's weighted creep theory?
04
(c) The details of a 4 hour storm hydrograph of a catchment area are
07
as follows:
Time
0 04 08 12
16
20 24 28 36
from
start
(hour)
Discharge 38 62 205 352 394 310 260 196 137
(m3/s)
Time from 40
44
48
start (hour)
Discharge 94
58
46
(m3/s)
The area of catchment is 630 km2 . Derive the ordinates of a 4-
h unit hydrograph for the catchment.
Q.4
(a) Discuss the factors considered for selection of the type of cross
03
drainage work
(b) Compare the merits and de-merits of Bligh's & Lane's
04
weighted creep theories.
(c) A horizontal aquifer is of 10m and infinite areal extent with its
07
top level 25m below ground level. Static piezometric surface is
10m below ground level. During steady rate of pumping from
the well at 5000 m3/day, the steady drawdown at the well is
12m. Permeability of aquifer formation is 48m/day. Assume
1
radius of influence as 500m. Find the effective well diameter in
meters.
Q.5
(a) Enlist types of surface irrigation methods.
03
(b) Explain the Bligh's creep theory used for diversion headworks.
04
(c) What is Khosla's theory for design of weir?
07
Q.6
(a) What are the sub surface irrigation methods?
03
(b) Compare Syphon aqueduct & Canal Syphon aqueduct.
04
(c) Which are the different modes of failure in gravity dams?
07
Explain any one in detail.
Q.7
(a) What is spillway and why it is constructed in dams?
03
(b) Why canal fall is required? Briefly explain different types of
04
canal fall
(c) Explain the classification of canal based on canal alignment.
07
Q.8
(a) Define "Specific yield" and "Coefficient of permeability".
03
(b) Enlist types of spillways.
04
(c) Design a channel for a discharge of 50m3/sec and take silt
07
factor of unity. Take breadth to depth of flow ratio same as
obtained in Lacey's method and design canal on the basis of
Kennedy's theory. Assume C.V.R. m=1.
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This post was last modified on 04 March 2021