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Silt excluders are constructed ________ while silt ejectors are constructed ________.
- a)on the river bed, on the diversion headworks
- b)on the river bed, on the bed of the off taken canal
- c)on the bed of the off taken canal, on the bed of the river
- d)on the bed of the off taken canal, on the river bed
Correct answer is option 'B'. Can you explain this answer?
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Silt excluders are constructed ________ while silt ejectors are constr...
Silt Control Devices: The entry of silt into a canal, which takes off from a diversion head works, can be reduced by constructing certain special works which are called silt control works or silt control devices. These works may be classified into the following two types:
Silt Excluders:
Silt Excluders:
- Silt excluders are those works which are constructed on the bed of the river at upstream of the head regulator.
- The clearer water enters the head regulator and consequently the silted water enters the silt excluder. In this type of works, the silt is, therefore, removed from the water before it enters the canal.
Silt Ejectors:
- Silt ejectors, also called silt extractors, are those devices that extract the silt from the canal water after the silted water has travelled a certain distance in the off-take canal.
- These works are, therefore, constructed on the bed of the canal, and a little distance downstream from the head regulator.
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Silt excluders are constructed ________ while silt ejectors are constr...
Construction of Silt Excluders and Silt Ejectors
Silt excluders and silt ejectors are hydraulic structures commonly used in irrigation systems to prevent the entry of silt into canals. They are designed to separate silt from the water flow and direct it away from the main canal, ensuring the delivery of clean water for irrigation purposes.
Silt Excluders
Silt excluders are constructed on the river bed, on the diversion headworks. The diversion headworks are the structures built at the intake point of the canal system, where water is diverted from a river or stream. Silt excluders are typically located at this point to filter out silt and other suspended sediments before the water enters the canal.
The construction of silt excluders involves the following steps:
1. Design and layout: The design of the silt excluder is based on the expected sediment load and the desired filtration efficiency. The layout of the structure is planned to ensure that the water flow is directed through the excluder, allowing silt to settle out.
2. Excavation: A trench is excavated on the river bed to accommodate the silt excluder structure. The dimensions of the trench depend on the design requirements and the flow rate of water.
3. Installation of screens: Screens or grates are installed across the trench to trap silt particles while allowing water to pass through. The screens are designed with openings of appropriate size to capture the desired range of sediment particles.
4. Construction of settling chamber: A settling chamber is constructed upstream of the screens to allow the silt to settle down under quiescent conditions. This chamber is designed to facilitate easy removal of accumulated sediment.
5. Outlet structure: An outlet structure is provided to discharge the filtered water into the canal system. This structure is designed to maintain a constant water level inside the silt excluder and prevent the entry of silt from the canal.
Silt Ejectors
Silt ejectors, on the other hand, are constructed on the bed of the off-taken canal. They are located at the point where water is diverted from the main canal to subsidiary canals or fields. The purpose of silt ejectors is to remove any sediment that may have entered the canal system and redirect it back into the river.
The construction of silt ejectors involves the following steps:
1. Design and layout: Similar to silt excluders, the design and layout of silt ejectors are based on the expected sediment load and the desired efficiency of sediment removal. The location of the ejectors is determined based on the off-take points of the canal system.
2. Excavation: A trench is excavated on the bed of the off-taken canal to accommodate the silt ejector structure. The dimensions of the trench depend on the design requirements and the flow rate of water.
3. Installation of screens: Screens or grates are installed across the trench to trap sediment particles suspended in the water. The screens are designed to allow water to pass through while retaining the sediment.
4. Construction of settling chamber:
Silt excluders and silt ejectors are hydraulic structures commonly used in irrigation systems to prevent the entry of silt into canals. They are designed to separate silt from the water flow and direct it away from the main canal, ensuring the delivery of clean water for irrigation purposes.
Silt Excluders
Silt excluders are constructed on the river bed, on the diversion headworks. The diversion headworks are the structures built at the intake point of the canal system, where water is diverted from a river or stream. Silt excluders are typically located at this point to filter out silt and other suspended sediments before the water enters the canal.
The construction of silt excluders involves the following steps:
1. Design and layout: The design of the silt excluder is based on the expected sediment load and the desired filtration efficiency. The layout of the structure is planned to ensure that the water flow is directed through the excluder, allowing silt to settle out.
2. Excavation: A trench is excavated on the river bed to accommodate the silt excluder structure. The dimensions of the trench depend on the design requirements and the flow rate of water.
3. Installation of screens: Screens or grates are installed across the trench to trap silt particles while allowing water to pass through. The screens are designed with openings of appropriate size to capture the desired range of sediment particles.
4. Construction of settling chamber: A settling chamber is constructed upstream of the screens to allow the silt to settle down under quiescent conditions. This chamber is designed to facilitate easy removal of accumulated sediment.
5. Outlet structure: An outlet structure is provided to discharge the filtered water into the canal system. This structure is designed to maintain a constant water level inside the silt excluder and prevent the entry of silt from the canal.
Silt Ejectors
Silt ejectors, on the other hand, are constructed on the bed of the off-taken canal. They are located at the point where water is diverted from the main canal to subsidiary canals or fields. The purpose of silt ejectors is to remove any sediment that may have entered the canal system and redirect it back into the river.
The construction of silt ejectors involves the following steps:
1. Design and layout: Similar to silt excluders, the design and layout of silt ejectors are based on the expected sediment load and the desired efficiency of sediment removal. The location of the ejectors is determined based on the off-take points of the canal system.
2. Excavation: A trench is excavated on the bed of the off-taken canal to accommodate the silt ejector structure. The dimensions of the trench depend on the design requirements and the flow rate of water.
3. Installation of screens: Screens or grates are installed across the trench to trap sediment particles suspended in the water. The screens are designed to allow water to pass through while retaining the sediment.
4. Construction of settling chamber:
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Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect answer is option 'B'. Can you explain this answer?
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Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect 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 Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect 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 Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect answer is option 'B'. Can you explain this answer?.
Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect 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 Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect 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 Silt excluders are constructed ________ while silt ejectors are constructed ________.a)on the river bed, on the diversion headworksb)on the river bed, on the bed of the off taken canalc)on the bed of the off taken canal, on the bed of the riverd)on the bed of the off taken canal, on the river bedCorrect answer is option 'B'. Can you explain this answer?.
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