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When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs at
- a)the point of inter-section of the inflow and outflow hydrographs
- b)a point, after the inter-section of the inflow and outflow hydrographs
- c)the tail of inflow hydrographs
- d)a point, before the inter-section of the inflow and ouflow hydrographs
Correct answer is option 'B'. Can you explain this answer?
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When the outflow from a storage reservoir is uncontrolled as in a free...
When outflow from a reservoir is uncontrolled as in freely operating spillway, then the peak of outflow hydrograph will occur at a point of intersection of inflow and outflow curves, whereas if outflow from a reservoir is controlled then peak will occur after the intersection of the curve.
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When the outflow from a storage reservoir is uncontrolled as in a free...
The correct answer is option B: a point, after the intersection of the inflow and outflow hydrographs.
When the outflow from a storage reservoir is uncontrolled, it means that there is no restriction or regulation on the release of water. In such situations, the spillway is freely operating, allowing water to flow out of the reservoir at its maximum capacity.
To understand why the peak of the outflow hydrograph occurs after the intersection of the inflow and outflow hydrographs, we need to understand the concept of lag time. Lag time refers to the time it takes for water to travel from the inflow point (usually the point where the rainfall occurs) to the outflow point (usually the point where the water is being released from the reservoir).
Let's break down the sequence of events:
1. Inflow hydrograph: This represents the inflow of water into the reservoir, usually due to rainfall or any other source. The inflow hydrograph shows the variation in the flow rate over time.
2. Outflow hydrograph: This represents the outflow of water from the reservoir through the spillway. The outflow hydrograph shows the variation in the flow rate over time.
3. Intersection point: This is the point where the inflow and outflow hydrographs intersect. This point represents the time at which the outflow from the reservoir starts.
4. Peak of outflow hydrograph: This is the point on the outflow hydrograph where the flow rate is at its maximum. It represents the peak discharge of water from the reservoir.
Now, let's consider the lag time. The lag time is the time it takes for the rainwater to reach the reservoir and then to flow out through the spillway. This time is influenced by factors such as the distance between the inflow and outflow points, the topography of the catchment area, and the flow characteristics of the reservoir.
Since the outflow from the reservoir is uncontrolled, the water is released at its maximum capacity, resulting in a higher flow rate. However, it takes some time for the water to reach the outflow point after the rainfall event. Therefore, the peak of the outflow hydrograph occurs after the intersection point, as there is a lag time between the rainfall and the release of water.
In conclusion, when the outflow from a storage reservoir is uncontrolled, the peak of the outflow hydrograph occurs after the intersection of the inflow and outflow hydrographs due to the lag time between the rainfall and the release of water.
When the outflow from a storage reservoir is uncontrolled, it means that there is no restriction or regulation on the release of water. In such situations, the spillway is freely operating, allowing water to flow out of the reservoir at its maximum capacity.
To understand why the peak of the outflow hydrograph occurs after the intersection of the inflow and outflow hydrographs, we need to understand the concept of lag time. Lag time refers to the time it takes for water to travel from the inflow point (usually the point where the rainfall occurs) to the outflow point (usually the point where the water is being released from the reservoir).
Let's break down the sequence of events:
1. Inflow hydrograph: This represents the inflow of water into the reservoir, usually due to rainfall or any other source. The inflow hydrograph shows the variation in the flow rate over time.
2. Outflow hydrograph: This represents the outflow of water from the reservoir through the spillway. The outflow hydrograph shows the variation in the flow rate over time.
3. Intersection point: This is the point where the inflow and outflow hydrographs intersect. This point represents the time at which the outflow from the reservoir starts.
4. Peak of outflow hydrograph: This is the point on the outflow hydrograph where the flow rate is at its maximum. It represents the peak discharge of water from the reservoir.
Now, let's consider the lag time. The lag time is the time it takes for the rainwater to reach the reservoir and then to flow out through the spillway. This time is influenced by factors such as the distance between the inflow and outflow points, the topography of the catchment area, and the flow characteristics of the reservoir.
Since the outflow from the reservoir is uncontrolled, the water is released at its maximum capacity, resulting in a higher flow rate. However, it takes some time for the water to reach the outflow point after the rainfall event. Therefore, the peak of the outflow hydrograph occurs after the intersection point, as there is a lag time between the rainfall and the release of water.
In conclusion, when the outflow from a storage reservoir is uncontrolled, the peak of the outflow hydrograph occurs after the intersection of the inflow and outflow hydrographs due to the lag time between the rainfall and the release of water.
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When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. Can you explain this answer?
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When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. 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 When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. 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 When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. Can you explain this answer?.
When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. 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 When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. 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 When the outflow from a storage reservoir is uncontrolled as in a freely operating spillway, the peak of outflow hydrograph occurs ata)the point of inter-section of the inflow and outflow hydrographsb)a point, after the inter-section of the inflow and outflow hydrographsc)the tail of inflow hydrographsd)a point, before the inter-section of the inflow and ouflow hydrographsCorrect answer is option 'B'. Can you explain this answer?.
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