MU Civil Engineering (Semester 7)
Irrigation Engineering
December 2016
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

Solve any four Q1 (a,b,c,d,e)
1(a) Discuss briefly the various techniques used for distributing water in the farms.
5 M
1(b) What is meant by "Flow duty" and "Quantity duty"? Describe briefly factors affecting duty.
5 M
1(c) What is Precipitation? Explain the various types of precipitation.
5 M
1(d) Difference between confined and unconfined aquiter with neat sketch.
5 M
1(e) Dicuss the factors which are considered for the selection of site for a proposed dam.
5 M

2(a) Write a short note on irrigation efficiencies
6 M
2(b) Explain recording type rain gauges with neat sketches.
6 M
2(c) Determine the reservoir capacity for Command area of 40,000ha,
canal losses =10% and reservoir losses = 10% Base period, outlet factor and intensity of irrigation are as under
Crop Base Period(days) Outlet factor (ha/cumes) Irrigation intensity(%)
Sugarcane 360 1700 20
Cottton 180 1500 10
Wheat 120 1800 20
Rice 120 700 15
Vegetables 120 700 15
8 M

3(a) What do you understand by Catchment area and Runoff? Expalin the various factors that influence the runoff from a catchment area.
8 M
3(b) The following are the ordinates of 12 hour unit hydrograph.
Time(hr) 0 12 24 36 48 60 72 84
Flow (102cumecs) 0 16 29 26 14 7 1.5 0
If successive 12 hour rainfall excesses are 1.5cm,
3.0 cm and 0.75 cm for the catchment, plot the resulting flood hydrograph on a sheet and mark the lag time and flow expected for the river.
8 M
3(c) Define " Storage coefficient" and " Transmissibility"
4 M

4(a) Write a short note on Reservoir Sedimentation and Explain the methods to control it.
6 M
4(b) Expalin the various forces acting on gravity dam with neat sketches.
6 M
4(c) A 60 cm diameter well is being pumped at a rate of 1360 lit/minute. Measurement in the near by test well were made at the same time as follows: At a distance of 6 m from the well being pumped , the drawdown was 6 m and at a 15m the drawdown was 1.5m. The bottom of the well is 90 m below the ground water table.
a) Find out the coefficient of premeability.
b) If all the observed points were on the dapuit's curve, what was th drawdown in the well during pumping?
c) what is the rate at which water can be drawn from this well.
8 M

5(a) What are the causes offailure of Earthen Dam? Explain in detail with neat sketches.
10 M
5(b) A concrete gravity dam has maximum water level 305.0m,
bed level 225.0m top R.L.of dam 3.09.0 m,
d/s face slope starts at R.L 300.0m,
d/s slope2:3,
tail water is nil,
upstream face of dam is vertical,
center line of drainage gallery is 8 m d/s of u/s face uplift pressure is 100% at the heel,
50% at the line of gallery and zero at toe,
weight of determine
i) Maximum vertical stresses at toe and heel of the dam,
ii) Major principal stresses at the toe of dam,
iii) Intensity of shear strees on a horiziontal palne near the toe.
10 M

6 Write a short note on following:
i) Arch and Buttres Dam
ii) Cross Drainage work
iii) Cannal Reggulation works
iv) Cannel Lining ande Water Logging
20 M

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