1. SATHYABAMA UNIVERSITY
(Established under section 3 of UGC Act, 1956)
Course & Branch: B.E .- CIVIL
Title of the paper: Water Resources Engineering
Semester: VII Max. Marks: 80
Sub.Code: 20704(2002/2003/2004) Time: 3 Hours
Date: 18-03-2008 Session: FN
PART – A (10 x 2 = 20)
Answer All the Questions
1. Mention any five components of water management.
2. Mention the essence of national water policy.
3. List any four common types of precipitation.
4. Mention the factors affecting runoff.
5. Define consumptive use and the methods to estimate it.
6. Define Net Irrigation Requirement [NIR].
7. Mention the types of Reserviors.
8. Define Design flood mention the types of flood that can be
estimated.
9. List the types of Irrigation.
10. Define the terms (i) Duty (ii) Delta.

2. PART – B (5 x 12 = 60)
Answer All the Questions
11. Describe National water policy and mention its salient features.
(or)
12. Define Irrigation water management and its objectives and
explain any five components of water management.
13. Explain in detail the various forms of precipitation also discuss
the types of precipitation.
(or)
14. (a) Compute the S-curve ordinate for the following 4 hour unit
hydrograph of a catchment of 300 km2
area.
(b) Also compute 5 hr unit hydrograph for this basin with the
help of above desired s – curve.
Time in hour Unit graph co-ordinates in
cumecs.
0 0
1 6
2 36
3 66
4 91
5 106
6 93
7 79
8 68
9 58
10 49
11 41
12 34
13 27
14 23
15 17
16 13

3. 17 9
18 6
19 3
20 1
21 0
22 0
15. (a) Write a note on water Requirement of crops.
(b) Explain depth and Frequency of Irrigation.
(or)
16. Determine consumptive use and Net Irrigation Requirement for a
crop from the data below.
Period Oct(10 -
31)
Nov(1-
30)
Dec(1 -
31)
Jan (1
– 31)
Feb (1
– 15)
Pan
Evaporation
Ep(cm)
5 10 9 8 4
Cu
Coefficient,
K
0.5 0.55 1.0 0.9 0.7
Effective
Rainfall
Re(cm)
2 1.5 1 0.5 0.2
17. Explain the methods for Flood control.
(or)
18. Explain the pre-construction and post-constructing measures
adopted for silt control in Reservoirs.
19. Explain in detail the different types of Irrigation.
(or)
20. (a) Wheat is to be grown at a certain place, the useful
climaatological conditions are as below. If wheat Requires about
7.5 cm of water after every 28 days and the base period for wheat
is 140 days find out the value for wheat

4. (b) Briefly explain the terms
i) Cash crops iii) Crop Rotation
ii) Crop seasons iv) Crop Ratio