RTU 2015 Question Paper Semester VIII Civil Engineering Water Resources Engineering II

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o B. Tech. YIII Sem. (Main/Back) Exam., April, 2015
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til Civil Engineering
€ 8CB2 Water Resources Engineering ' II

Time: 3 Hours Maximum Marks: 80
Min. Passing Marks: 24
Instructions to Candidates :
Attempt any five questions, selecting one question from each unit. All questions
carry equal marks. Schematic diagrams must be shown wherever necessary. Any
data you feel missing suitably be assumed and stated clearly.
Units of quantities used/calculated must be stated clearly.
Use of following supporting material is permitted during examination.
I. NIL 2.NIL

Q.l (a) Describe the necessity of providing a canal fall. What are the factor to be
considered while deciding the location of a fall? t8l

(b) What are the factors to be considered for selecting suitable type of cross drainage
works? t8l

OR

Q.1 (a) Draw the sketch and explain the design of various components of a Sarda type
fall. t8l

(b) Describe the points to be considered for selecting the site of a cross drainage
work. t8l

[8E4032] Page 1 of4 166201

Q.2 (a)

Calculate uplift pressures at key points of all the three piles of the structure
shown above. Also check the thickness provided and the exit gradient. The safe
exit gradientis 1.5 u2)
(b) Compare the Bligh's and and Khosla's theories. l4l
OR

Q.2 Design a vertical drop weir using Bligh's theory and check the exit gradient and the
thickness of floor by Khosla's theory for the given data.

(i) Design flood discharge = 4000 m3/s
(ii) H. F. L. before construction = 200.00
(iii) F. S. L. of canal = 199.00
(iv) Average bed level of river = 192.00
(v) Retrogression of bed = 0.50m
(vi) Lacey's silt factor = 1.0
(vii) Safe exit gradient = l/5
(viii) Coefficient of creep = | |
(ix) D/S bed level = 192.00
(x) Afflux = 1.0m
Draw the sketch of vertical drop weir showing all the components. Il6l
[8E4032] Page2 of4 t662ol

UNIT - III
Q.3 (a)
l+?m-+l

63m

l" + m{<- 46 n|
--------+l

Check the stability of the gravity dam shown above for the reservoir empty and
reservoir full conditions. Calculate the principal stresses and shear stress at toe
and heel of the dam. Consider only self weight, weight of water, water pressure
and uplift pressures. Average shear strength (q) = 1.4 MPa and
Wc = 24 KN/m3. lt21
(b) Describe the phenomenon of piping in earth dam and its prevention methods [4]
OR

Q.3 (a) Check the stability of u/s and d/s slopes of the given earth dam. Assume The
saturated unit weight = 2l KN/# and unit weight under steady seepage = 20

KN/m3, the rp- 25' andunder C = 20 KN/m2 and 6 = 60"

[8E4032] Page 3 of4 166201

The areas of rectangle plotted ore' itn = 13'0 c#' ar = 6'6 cnf and ao = 3.0crr],
with scale 1 cm = 5 m for downstream side, aN = 14.0 crr? U = 4.2 cm' for up
stream side with same scale. The radius r of the slip circle = 75 cm in both
cases. l8l
(b) Briefly describe the forces acting on a gravity dam. t8l

UNIT - IV
e.4 (a) What are the essential requirements of a spillway? Describe the factors affecting
required spillway caPacitY. t8l

(b) Draw and explain the general features of a hydro electric scheme. t8l

OR

Q.4 (a) Sketch and describe different type of spillways. t8l

(b) Describe the function of a draft tube. Explain cavitations. t8l

Q.5 (a) Describe briefly environmental impact assessment of water resource projects. t8l
(b) Describe water shed management. t8l

OR

Q.5 Write short notes on the following. l4x4=16)

(i) ReservoirSedimentation
(ii) Use of computer aided designs in irrigation projects.
(iii) Optimization techniques'
' (iv) G. I. S in water resources engineering

Page 4 of4 16620l
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