JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III HYDROLOGY AND WATER RESOURCES ENGINEERING Previous Question Paper (February - 2023 - R18)
Part A is compulsory. In Part B, Answer any one question from each unit.
PART A
Define probable maximum precipitation.
Answer
Probable Maximum Precipitation (PMP) is defined as the theoretically greatest depth of precipitation for a given duration that is physically possible over a given size storm area at a particular geographical location at a certain time of the year.
List out various forms of precipitation.
Answer
The various forms of precipitation include:
- Rain
- Snow
- Drizzle
- Glaze
- Sleet
- Hail
Elaborate the concept of W-index.
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What is flow duration curve?
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Define unit hydrograph.
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Define S-hydrograph.
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Elaborate Darcy’s law.
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Define infiltration.
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List out canal losses.
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What do you mean by canal lining?
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PART B
Some clouds cause higher rain, some cause heavier rain, and some others cause snowfall. In this context, discuss critically the formation of rain drops and snowflakes in clouds.
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Enumerate the different types of rain gauges, and describe with neat sketch, the construction and functioning of the non-recording type of gauge being used in India.
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Define and explain the following terms:
a) Catchment area
b) Runoff and Surface runoff
c) Hydrograph of a storm
d) Yield of a drainage basin
e) Average annual rainfall.
Answer
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Briefly describe any method by which you can measure the evaporation loss from a free- water surface.
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Explain any two methods of reducing the evaporation loss from a free-water surface.
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Explain the following:
a) Evaporation
b) Percolation
c) Interception
d) Transpiration.
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How would you obtain a Unit hydrograph from an isolated intense short duration storm occurring uniformly over the basin?
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Explain the method by which maximum runoff can be estimated from a catchment. Describe the method of computing the ordinates of a Unit-hydrograph from the data of a flood hydrograph.
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Elaborate the concept of a Unit-hydrograph? Discuss its uses, and explain how a 6-hour unit hydrograph can be determined from a given 3-hour unit hydrograph.
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Define and explain the following terms, as used in connection with ground water:
a) Capillary fringe
b) Specific yield
c) Pellecular water
d) Field capacity
e) Permeability and transmissibility.
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Derive the formula for discharge of well in a homogeneous artesian aquifer assuming equilibrium flow conditions.
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What is meant by water-logging?
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What are the principal causes and effects of water-logging in a canal irrigated farm?
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What precautions and measures will you adopt to prevent water logging of irrigated lands?
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Discuss the salient features of Kennedy’s theory for the design of earth channels based on the critical velocity concept, and mention its limitations.
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Design an earth canal section to carry 50 cumecs discharge at a slope of 0.25 m/km, having been given that N=0.0225, and m=1.00, where the symbols have their usual meaning.
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