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Consider the following statements with respect to barchans dunes:
- Transverse dunes are transformed into barchan dunes.
- Leeward side of barchans dunes is concave in plan with a steep slope.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements with respect to barchans dunes: Tran...
Statement 1: Transverse dunes are transformed into barchan dunes.
Transverse dunes and barchan dunes are two different types of dunes found in deserts. Transverse dunes are long and linear dunes that form perpendicular to the wind direction. On the other hand, barchan dunes are crescent-shaped dunes that form parallel to the wind direction.
Statement 2: Leeward side of barchan dunes is concave in plan with a steep slope.
The leeward side of a dune refers to the side that is sheltered from the prevailing wind. In the case of barchan dunes, the leeward side is indeed concave in plan, forming a crescent shape. This concave side has a steep slope, while the windward side (the side facing the wind) has a gentler slope.
Explanation:
The correct answer is option C, which states that both statements 1 and 2 are correct.
Transverse dunes transforming into barchan dunes:
Transverse dunes are long, straight or slightly sinuous dunes that form perpendicular to the wind direction. They typically have a steep slip face on the windward side and a gentler slope on the leeward side. Over time, due to changes in wind patterns or sediment availability, transverse dunes can transform into barchan dunes.
Formation of barchan dunes:
Barchan dunes form in areas where there is limited sand supply. They start as smaller transverse dunes, but as the sand supply decreases, they evolve into crescent-shaped dunes. The wind blows sand up the gentle windward slope, and it cascades down the steep leeward slope, forming a characteristic crescent shape.
Leeward side of barchan dunes:
The leeward side of a barchan dune is the concave side, which is sheltered from the wind. This side has a steeper slope because the sand particles slide down due to gravity. The windward side, on the other hand, has a gentler slope because the sand is being deposited by the wind.
Summary:
In summary, transverse dunes can transform into barchan dunes when there is a limited sand supply. The leeward side of barchan dunes is concave in plan and has a steep slope, while the windward side has a gentler slope. Therefore, both statements 1 and 2 are correct.
Transverse dunes and barchan dunes are two different types of dunes found in deserts. Transverse dunes are long and linear dunes that form perpendicular to the wind direction. On the other hand, barchan dunes are crescent-shaped dunes that form parallel to the wind direction.
Statement 2: Leeward side of barchan dunes is concave in plan with a steep slope.
The leeward side of a dune refers to the side that is sheltered from the prevailing wind. In the case of barchan dunes, the leeward side is indeed concave in plan, forming a crescent shape. This concave side has a steep slope, while the windward side (the side facing the wind) has a gentler slope.
Explanation:
The correct answer is option C, which states that both statements 1 and 2 are correct.
Transverse dunes transforming into barchan dunes:
Transverse dunes are long, straight or slightly sinuous dunes that form perpendicular to the wind direction. They typically have a steep slip face on the windward side and a gentler slope on the leeward side. Over time, due to changes in wind patterns or sediment availability, transverse dunes can transform into barchan dunes.
Formation of barchan dunes:
Barchan dunes form in areas where there is limited sand supply. They start as smaller transverse dunes, but as the sand supply decreases, they evolve into crescent-shaped dunes. The wind blows sand up the gentle windward slope, and it cascades down the steep leeward slope, forming a characteristic crescent shape.
Leeward side of barchan dunes:
The leeward side of a barchan dune is the concave side, which is sheltered from the wind. This side has a steeper slope because the sand particles slide down due to gravity. The windward side, on the other hand, has a gentler slope because the sand is being deposited by the wind.
Summary:
In summary, transverse dunes can transform into barchan dunes when there is a limited sand supply. The leeward side of barchan dunes is concave in plan and has a steep slope, while the windward side has a gentler slope. Therefore, both statements 1 and 2 are correct.
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Consider the following statements with respect to barchans dunes: Tran...
Barchan dunes
- Sand dunes of crescentic shapes having two horns are called barchans. In fact, barchans are a special type of transverse dunes. Hence, statement 1 is correct.
- The windward side has a gentle slope that is convex in the plan while the leeward side is concave in plan with a steep slope. Hence, statement 2 is correct.
- Transverse dunes are transformed into barchans when sand supply becomes more limited downwind. They are formed in groups when there is an ample supply of sands. Isolated barchans are formed when the supply of sands is inadequate. The crest of barchans is divided into two horns downwind due to dominant prevailing winds, wind eddies, and a limited supply of sands.
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Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements with respect to barchans dunes: Transverse dunes are transformed into barchan dunes. Leeward side of barchans dunes is concave in plan with a steep slope.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
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