JNTU
JNTU B.Tech III WATER RESOURCES ENGINEERING-I Previous Question Paper (May - 2018 - R13)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
List the factors that affect the runoff from catchment area.
Answer
The factors affecting runoff include precipitation characteristics (intensity, duration, and distribution), catchment characteristics (size, shape, slope, and land use), soil type, geological conditions, and initial moisture conditions.
Describe various types of precipitation.
Answer
Precipitation is classified based on the mechanism of lifting the air mass:
- Cyclonic precipitation: Caused by the lifting of air due to pressure differences in a cyclone or anticyclone.
- Convective precipitation: Caused by the heating of air near the ground, causing it to rise, cool, and condense.
- Orographic precipitation: Caused by air masses being forced to rise over mountain barriers.
What is effective rainfall?
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Write down the assumptions of unit hydrograph.
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Define aquiclude.
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Draw the divisions of sub-surface water.
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List the importance of irrigation.
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What are the ill effects of irrigation?
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How do you classify the canal, based on the functions of the canal?
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What are the disadvantages of canal lining?
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Part B
Explain tipping bucket type rain gauge with a neat sketch.
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Describe the factors affecting infiltration.
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Explain any one method of estimation of evaporation in detail.
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Describe any two methods of computing average rainfall over the basin.
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What is unit hydrograph? How do you construct it?
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Describe the two methods of separating base flow from the total runoff.
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The ordinates of a 4h unit hydrograph of a basin area 300km2 measured at 1h intervals are 6, 36, 66, 91, 106, 93, 79, 68, 58, 49, 41, 34, 27, 23, 17, 13, 9, 6, 3 and 1.5 m3/s respectively. Obtain the ordinates of a 3h unit hydrograph for the basin using the S-curve technique.
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Explain the types of aquifer.
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How do you determine the yield of the open well from recuperation test?
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Explain in detail the types of tube wells along with their construction details.
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Explain in detail the factors affecting duty.
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After how many days will you supply water to soil in order to ensure efficient irrigation of the given crop, if:
a) Field capacity of soil = 27%
b) Permanent wilting point = 14%
c) Dry density of soil = 15kN/m3
d) Effective depth of root zone = 75 cm
e) Daily consumptive use of water for the given crop = 11mm.
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Design a regime channel for a discharge of 35 m3/s with silt factor of 0.9 by Lacey’s theory, taking side slopes as 1H:2V.
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Explain the balancing depth of cutting.
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Explain the flood frequency analysis method.
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