JNTU
JNTU B.Tech III SOIL AND WATER CONSERVATION ENGINEERING Previous Question Paper (November/December - 2017 - R15)
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
What do you mean by soil erosion?
Answer
Soil erosion is the detachment and transportation of soil particles from the land surface by natural agents like water, wind, or ice, leading to the degradation of soil quality and productivity.
Explain gully erosion.
Answer
Gully erosion is an advanced stage of rill erosion where water concentrates in narrow channels, cutting deep trenches into the soil. These channels are too large to be removed by normal tillage operations and often result in significant land fragmentation and sediment loss.
List the factors effecting wind erosion.
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List forms of water erosion.
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What is conservation ditching?
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Compute horizontal and vertical interval of bunds for land having 4% slope.
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What is a Hydraulic radii?
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List the types of vegetation of vegetated waterways.
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Explain the term sedimentation.
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What is trap efficiency?
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Part B
Explain the different stages of erosion.
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Explain the forms of water erosion.
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Write Universal soil loss equation. Define the different terms of equation.
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Explain the mechanics of water erosion.
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Explain with a schematic diagram the process of formation of sand dunes.
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What are the factors affecting Runoff? Explain.
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Explain the Land use capability classification based on different criteria with a special reference to slope.
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Discuss briefly the agronomic measures for erosion control.
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Derive expression for height of contour bund considering the maximum depth of rainfall excess as 15 cm.
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Write down the design steps of graded bunds.
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A 15% hilly land is proposed for constructing bench terrace. Calculate the following details of bench terrace considering 2.5 m as vertical interval and 1:1 as batter slope:
- Terrace width
- Length of the terrace per hectare
- Earth work
- Area lost
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Explain contour trenching as a soil conservation measure with its classification and design details.
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Write down the design steps of bench terracing.
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Discuss the design of vegetative waterways in detail.
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Explain different temporary structures for controlling the gully erosion with suitable figures.
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Explain the layout and design of farm ponds.
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Write a short note on stream quality.
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