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An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :
- a)Positive surge moving upstream and a negative surge moving downstream.
- b)Positive surge moving downstream and a negative surge moving upstream.
- c)Positive surge moving upstream and a positive surge moving downstream.
- d)Negative surge moving upstream and a negative surge moving downstream.
Correct answer is option 'A'. Can you explain this answer?
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An irrigation canal has a steady discharge Q at a section where a cros...
Explanation:
When the gate of the irrigation canal regulator is suddenly lowered down to a half-open position, it results in a rapidly varied unsteady flow. In this situation, the flow experiences positive and negative surges moving in both upstream and downstream directions.
Positive Surge Moving Upstream:
When the gate is suddenly lowered down, the flow area decreases, causing an increase in velocity. This sudden increase in velocity generates a positive surge that moves upstream. This surge is caused by the momentum of the water in the canal, which continues to move forward due to its inertia even though the gate is partially closed.
Negative Surge Moving Downstream:
As the gate is partially closed, the flow area decreases, causing an increase in velocity. When the gate is suddenly opened again, the flow area increases, resulting in a decrease in velocity. This sudden decrease in velocity generates a negative surge that moves downstream. This surge is caused by the sudden decrease in momentum of the water in the canal as the gate opens.
Summary:
In summary, when the gate of the irrigation canal regulator is suddenly lowered down to a half-open position, it causes a rapidly varied unsteady flow. This flow results in a positive surge moving upstream and a negative surge moving downstream. The positive surge is caused by the momentum of the water in the canal, while the negative surge is caused by the sudden change in velocity as the gate opens.
When the gate of the irrigation canal regulator is suddenly lowered down to a half-open position, it results in a rapidly varied unsteady flow. In this situation, the flow experiences positive and negative surges moving in both upstream and downstream directions.
Positive Surge Moving Upstream:
When the gate is suddenly lowered down, the flow area decreases, causing an increase in velocity. This sudden increase in velocity generates a positive surge that moves upstream. This surge is caused by the momentum of the water in the canal, which continues to move forward due to its inertia even though the gate is partially closed.
Negative Surge Moving Downstream:
As the gate is partially closed, the flow area decreases, causing an increase in velocity. When the gate is suddenly opened again, the flow area increases, resulting in a decrease in velocity. This sudden decrease in velocity generates a negative surge that moves downstream. This surge is caused by the sudden decrease in momentum of the water in the canal as the gate opens.
Summary:
In summary, when the gate of the irrigation canal regulator is suddenly lowered down to a half-open position, it causes a rapidly varied unsteady flow. This flow results in a positive surge moving upstream and a negative surge moving downstream. The positive surge is caused by the momentum of the water in the canal, while the negative surge is caused by the sudden change in velocity as the gate opens.
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An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. Can you explain this answer?
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An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. 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 An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. 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 An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. Can you explain this answer?.
An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. 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 An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. 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 An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. Can you explain this answer?.
Solutions for An irrigation canal has a steady discharge Q at a section where a cross regulation (gated) is provided for control purposes. If the gate of the regulator, which is normally fully open, is suddenly lowered down to a half open position, then a rapidly varied unsteady flow results. In such a case, it would take a form of :a)Positive surge moving upstream and a negative surge moving downstream.b)Positive surge moving downstream and a negative surge moving upstream.c)Positive surge moving upstream and a positive surge moving downstream.d)Negative surge moving upstream and a negative surge moving downstream.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
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