Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > For a given storm, other factors remaining sa...
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For a given storm, other factors remaining same,
- a)basins having Sow drainage density give smaller peaks in flood hydrographs
- b)basins with larger drainage densities give smaller flood peaks
- c)low drainage density basins give shorter time bases of hydrographs
- d)the flood peak is independent of the drainage density
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
For a given storm, other factors remaining same,a)basins having Sow dr...
The drainage density is defined as the ratio of the total channel length to the total drainage area. A large drainage density creates situation conductive for quick disposal of runoff drawn the channels.
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For a given storm, other factors remaining same,a)basins having Sow dr...
Explanation:
Factors affecting flood hydrographs:
Flood hydrographs are affected by various factors such as rainfall intensity, duration, distribution, antecedent moisture condition, topography, soil type, land use, etc. Drainage density is also one of the factors that affect the flood hydrograph.
Effect of drainage density:
Drainage density is defined as the total length of all streams and channels in a drainage basin divided by the area of the drainage basin. It is a measure of how well a drainage basin is drained by the stream network. The effect of drainage density on flood hydrograph is as follows:
- Basins having low drainage density give larger peaks in flood hydrographs: In basins with low drainage density, the water takes a longer time to reach the stream network. As a result, the peak of the flood hydrograph is higher.
- Basins having high drainage density give smaller peaks in flood hydrographs: In basins with high drainage density, the water reaches the stream network quickly. As a result, the peak of the flood hydrograph is lower.
- Low drainage density basins give longer time bases of hydrographs: In low drainage density basins, the water takes a longer time to reach the stream network. As a result, the time base of the flood hydrograph is longer.
- The flood peak is independent of the drainage density: This statement is incorrect. The flood peak is affected by the drainage density, as explained above.
Conclusion:
Thus, the correct option is (a), i.e., basins having low drainage density give larger peaks in flood hydrographs.
Factors affecting flood hydrographs:
Flood hydrographs are affected by various factors such as rainfall intensity, duration, distribution, antecedent moisture condition, topography, soil type, land use, etc. Drainage density is also one of the factors that affect the flood hydrograph.
Effect of drainage density:
Drainage density is defined as the total length of all streams and channels in a drainage basin divided by the area of the drainage basin. It is a measure of how well a drainage basin is drained by the stream network. The effect of drainage density on flood hydrograph is as follows:
- Basins having low drainage density give larger peaks in flood hydrographs: In basins with low drainage density, the water takes a longer time to reach the stream network. As a result, the peak of the flood hydrograph is higher.
- Basins having high drainage density give smaller peaks in flood hydrographs: In basins with high drainage density, the water reaches the stream network quickly. As a result, the peak of the flood hydrograph is lower.
- Low drainage density basins give longer time bases of hydrographs: In low drainage density basins, the water takes a longer time to reach the stream network. As a result, the time base of the flood hydrograph is longer.
- The flood peak is independent of the drainage density: This statement is incorrect. The flood peak is affected by the drainage density, as explained above.
Conclusion:
Thus, the correct option is (a), i.e., basins having low drainage density give larger peaks in flood hydrographs.
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For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer?.
For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer?.
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For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of For a given storm, other factors remaining same,a)basins having Sow drainage density give smaller peaks in flood hydrographsb)basins with larger drainage densities give smaller flood peaksc)low drainage density basins give shorter time bases of hydrographsd)the flood peak is independent of the drainage densityCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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