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As per lacey’s method for the design of alluvial channels, identify the correct statement.
- a)Wetted perimeter increases with an increase in design discharge.
- b)Hydraulic perimeter increases with an increase in silt factor.
- c)wetted perimeter increases with a decrease in design discharge.
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
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As per lacey’s method for the design of alluvial channels, identify t...
Lacey’s hypothesis
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Silt is kept in suspension by the vertical component of eddies generated at all forces normal to the wetted perimeter.
According to lacey, there may be three regime conditions:
- True regime
- Initial regime
- Final regime
As per lacey’s method for the design of alluvial channels, Wetted perimeter increases with an increase in design discharge.
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As per lacey’s method for the design of alluvial channels, identify t...
Answer:
Lacey's method is a widely used technique for the design of alluvial channels, specifically for the estimation of hydraulic parameters such as wetted perimeter and hydraulic radius. The correct statement regarding Lacey's method is option 'A', which states that the wetted perimeter increases with an increase in design discharge. Let's understand this in detail.
Introduction to Lacey's Method:
Lacey's method was developed by Dr. G. F. Lacey in the early 20th century and is based on extensive research on alluvial channels in India. It provides a rational approach to the design of stable trapezoidal channels.
Explanation:
The wetted perimeter refers to the length of the channel boundary that is in contact with water. It is an important hydraulic parameter that affects flow resistance, energy dissipation, and channel stability. Lacey's method provides a relationship between the wetted perimeter and the design discharge.
According to Lacey's method, the wetted perimeter is directly proportional to the design discharge. This means that as the design discharge increases, the wetted perimeter also increases. This relationship is based on the assumption that a higher discharge will result in a wider and deeper channel, which in turn increases the length of the channel boundary in contact with water.
Significance of Wetted Perimeter:
The wetted perimeter plays a crucial role in determining the hydraulic efficiency of a channel. It affects the channel's capacity to carry flow, the frictional resistance to flow, and the velocity distribution across the channel cross-section. Therefore, it is essential to accurately estimate the wetted perimeter for the design of alluvial channels.
Conclusion:
In conclusion, Lacey's method for the design of alluvial channels states that the wetted perimeter increases with an increase in design discharge. This relationship is based on the assumption that a higher discharge will result in a wider and deeper channel, leading to a longer length of the channel boundary in contact with water.
Lacey's method is a widely used technique for the design of alluvial channels, specifically for the estimation of hydraulic parameters such as wetted perimeter and hydraulic radius. The correct statement regarding Lacey's method is option 'A', which states that the wetted perimeter increases with an increase in design discharge. Let's understand this in detail.
Introduction to Lacey's Method:
Lacey's method was developed by Dr. G. F. Lacey in the early 20th century and is based on extensive research on alluvial channels in India. It provides a rational approach to the design of stable trapezoidal channels.
Explanation:
The wetted perimeter refers to the length of the channel boundary that is in contact with water. It is an important hydraulic parameter that affects flow resistance, energy dissipation, and channel stability. Lacey's method provides a relationship between the wetted perimeter and the design discharge.
According to Lacey's method, the wetted perimeter is directly proportional to the design discharge. This means that as the design discharge increases, the wetted perimeter also increases. This relationship is based on the assumption that a higher discharge will result in a wider and deeper channel, which in turn increases the length of the channel boundary in contact with water.
Significance of Wetted Perimeter:
The wetted perimeter plays a crucial role in determining the hydraulic efficiency of a channel. It affects the channel's capacity to carry flow, the frictional resistance to flow, and the velocity distribution across the channel cross-section. Therefore, it is essential to accurately estimate the wetted perimeter for the design of alluvial channels.
Conclusion:
In conclusion, Lacey's method for the design of alluvial channels states that the wetted perimeter increases with an increase in design discharge. This relationship is based on the assumption that a higher discharge will result in a wider and deeper channel, leading to a longer length of the channel boundary in contact with water.
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As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer?
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As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer?.
As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for As per lacey’s method for the design of alluvial channels, identify the correct statement.a)Wetted perimeter increases with an increase in design discharge.b)Hydraulic perimeter increases with an increase in silt factor.c)wetted perimeter increases with a decrease in design discharge.d)none of theseCorrect answer is option 'A'. Can you explain this answer?.
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