Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Which of the following statement is wrong?a)T...
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Which of the following statement is wrong?
- a)The design and execution of flood control scheme is chiefly governed by the peak flood levels
- b)Silting of reservoirs and rivers is an important aspect of sediment control
- c)The storage capacity of the reservoir is reduced by its silting
- d)Natural rivers used for navigation rarely gets silted up posing no cost issues
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statement is wrong?a)The design and execution o...
Incorrect Statement: Natural rivers used for navigation rarely gets silted up posing no cost issues.
Explanation:
Importance of sediment control
Sediment control is an important aspect of water resource management as it affects the water quality, flow, and storage capacity of the rivers, reservoirs, and other water bodies. It is important to control sediment to prevent erosion, maintain the water quality, and ensure the safety of infrastructure.
Silting of rivers and reservoirs
Sedimentation occurs when the sediments carried by the water settle down due to a decrease in velocity. The sediments are deposited in the rivers, dams, and reservoirs, reducing their storage capacity. The sedimentation rate is affected by the water velocity, the shape of the river channel, and the nature of the soil and rocks in the area.
Flood control scheme
The design and execution of flood control schemes are governed by the peak flood levels. The storage capacity of the rivers and reservoirs is a crucial factor in flood control. Silting reduces the storage capacity, and therefore, it is essential to control sedimentation in rivers and reservoirs. Proper sediment control measures, such as sediment basins, sediment ponds, and filters, can help to prevent sedimentation and maintain the storage capacity of the water bodies.
Navigation in rivers
Natural rivers used for navigation are also affected by sedimentation. Siltation can make the navigation difficult and expensive. The sedimentation can cause the river to become shallow, reducing the depth of the channel, and increasing the risk of collision and grounding. The cost of dredging and maintaining the navigation channel increases with the rate of sedimentation.
Conclusion
Therefore, the statement "Natural rivers used for navigation rarely get silted up, posing no cost issues" is incorrect. Sedimentation is a natural process that affects all water bodies, including rivers used for navigation. Proper sediment control measures are necessary to maintain the navigability of the river and to prevent the cost of dredging and maintenance.
Explanation:
Importance of sediment control
Sediment control is an important aspect of water resource management as it affects the water quality, flow, and storage capacity of the rivers, reservoirs, and other water bodies. It is important to control sediment to prevent erosion, maintain the water quality, and ensure the safety of infrastructure.
Silting of rivers and reservoirs
Sedimentation occurs when the sediments carried by the water settle down due to a decrease in velocity. The sediments are deposited in the rivers, dams, and reservoirs, reducing their storage capacity. The sedimentation rate is affected by the water velocity, the shape of the river channel, and the nature of the soil and rocks in the area.
Flood control scheme
The design and execution of flood control schemes are governed by the peak flood levels. The storage capacity of the rivers and reservoirs is a crucial factor in flood control. Silting reduces the storage capacity, and therefore, it is essential to control sedimentation in rivers and reservoirs. Proper sediment control measures, such as sediment basins, sediment ponds, and filters, can help to prevent sedimentation and maintain the storage capacity of the water bodies.
Navigation in rivers
Natural rivers used for navigation are also affected by sedimentation. Siltation can make the navigation difficult and expensive. The sedimentation can cause the river to become shallow, reducing the depth of the channel, and increasing the risk of collision and grounding. The cost of dredging and maintaining the navigation channel increases with the rate of sedimentation.
Conclusion
Therefore, the statement "Natural rivers used for navigation rarely get silted up, posing no cost issues" is incorrect. Sedimentation is a natural process that affects all water bodies, including rivers used for navigation. Proper sediment control measures are necessary to maintain the navigability of the river and to prevent the cost of dredging and maintenance.
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Community Answer
Which of the following statement is wrong?a)The design and execution o...
Natural rivers used for navigation frequently get silted up which reduces the clear depth required for the same. This often requires costly dredging due to the sediment deposited in the rivers and harbours.
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Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer?
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Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer?.
Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is wrong?a)The design and execution of flood control scheme is chiefly governed by the peak flood levelsb)Silting of reservoirs and rivers is an important aspect of sediment controlc)The storage capacity of the reservoir is reduced by its siltingd)Natural rivers used for navigation rarely gets silted up posing no cost issuesCorrect answer is option 'D'. Can you explain this answer?.
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