SPPU Civil Engineering (Semester 8)
Dams and Hydraulic Structures
April 2015
Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Answer any one question from Q1 and Q2
1 (a) Explain the concept of construction of R.C.C. Dams and state and explain the advantages of R.C.C. Dams.
8 M
1 (b) (i) Dam Instrumentation
4 M
1 (b) (ii) Strengthening of dams.
4 M

2 (a) What are different types of arch dams? And explain any one type of arch dam.
8 M
2 (b) What are different factors that govern the selection of site for dam.
8 M

Answer any one question from Q3 and Q4
3 (a) State any four forces acting on gravity dam and write their equations.
8 M
3 (b) What is phenomenon and significance of
i) Steady seepage condition
ii) Sudden drawdown condition
10 M

4 (a) Write any four forces acting on a slide of an earthen dam failure envelope with the help of a sketch of free body diagram of forces and write their equations.
10 M
4 (b) If drainage gallery is not provided in gravity dam, then what will happen to its stability? Explain with help of sketch. Also write an equation of pressure if gallery is provided in gravity dam.
8 M

Answer any one question from Q5 and 6
5 (a) What is economic height of dam? How it is determined? Calculate the economic height using following data.
 Ht (m) Cost of Construction
(Crores in Rs.)
Storage Mm3
13 4 46
23 7 101
33 10 176
43 15 250
53 21 328
63 26 401
70 36 505
8 M
5 (b) What is filter? Why it is provided? Write the design criteria of filter. Also, state types of filters.
8 M

6 (a) State middle third rule and with help of sketch explain its significance.
8 M
6 (b) What is phreatic line? Enlist the steps to draw the phreatic line.
8 M

Answer any one question from Q7 and Q8
7 (a) State the classification of spillways and explain functioning of ogee spillway. Also enlist design steps of ogee spillway.
8 M
7 (b) Why gates are provided on spillways? Explain functioning of radial gate with help of sketch.
8 M

8 (a) What is diversion head work? Draw its layout and state its components.
8 M
8 (b) Write down equations for following.
i) Correction on account of mutual interference
ii) Exit gradient
Explain the terms of above equations with help of sketch.
8 M

Answer any one question from Q9 and Q10
9 (a) Enlist the steps in designing of trapezoidal lined canal.
10 M
9 (b) When the syphon and aqueduct is selected as appropriate CD work? Explain with sketch.
8 M

10 (a) Define
i) Capacity factor
ii) Time factor
iii) Lining of canal
iv) Limiting velocity
8 M
10 (b) Differentiate between cross-regulator and head regulator with help of sketch.
10 M

Answer any one question from Q11 and Q12
11 (a) What is river training? Why it is done? Explain classification of river training.
8 M
11 (b) With help of sketch, explain layout of hydropower plan. State the different components and their functions.
8 M

12 (a) What is groyne? State classification of groyne.
8 M
12 (b) Define.
i) Load factor
ii) Utilization factor
iii) Capacity factor
iv) Assessment of power potential.
8 M

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