Canal Syphon.pptx

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1. Canal Syphon By: Poojan Arvindbhai Patel Er. No.:20012071014 Batch: G1

2. Content Introduction Function Cross Drainage Works Syphon 20XX Sample Footer Text 2 This Photo by Unknown Author is licensed under CC BY-SA

3. Canal Syphon A canal syphon (or Simply a syphon) is a structure in which the canal is taken below the drainage and the canal water flows under symphonic action and there is no presence of atmospheric pressure in the canal. It is thus the reverse of a syphon aqueduct. 20XX Sample Footer Text 3

4. Structure, where the drain is taken over the canal such that the canal water runs below the drain either freely or under syphonic action. When the FSL of the canal is below the under side of the drainage trough and canal water flows freely under gravity, the structure is known as Super-passage. When the canal FSL is below the under side of the drainage trough, so that the canal flows under syphonic action under the trough the structure is known as Canal syphon.

5. Syphon is a structure constructed at the intersection of two waterways. Syphon carries the discharge of one waterway under the other. Usually the smaller waterway's discharge passes under the large one. Canal may be flumed for economy, subject to the availability of head loss in the HPS. The drainage trough should not be flumed. Inspection Track: can not be provided along the canal. A separate bridge/Causeway will be provided for inspection track.

6. Function In a canal syphon, drainage is carried over canal similar to a super passage, but the full supply level of canal is above than the drainage trough. T he canal water flows under syphonic action and there is no presence of atmospheric pressure in canal.

7. When compared, super passage is more often preferred than canal Syphon because in a canal Syphon , big disadvantage is that the canal water is under drainage trough so any defective minerals or sediment deposited cannot be removed with ease like in the case of a Syphon Aqueduct. Flooring of canal is depressed and ramp like structure is provided at upstream and downstream to form syphonic action. This structure is a reverse of Syphon aqueduct.

8. Canal Syphon 20XX Sample Footer Text 9

9. Cross Drainage Works Syphon Hydrology of the drain: Computation of maximum flood discharge and the MFL Hydraulic design: Water way/Vent way Vertical Clearance Free Board Crust Level of the Road way or a Bridge

10. Afflux Depth of Scour Mean Depth of Scour (d) Maximum Depth of Scour or Designed Depth of Scour (D) or R) Uplift Exit gradient Loss of Head (Energy Loss) Joints Structural Design: Super structure Sub structure

11. CD Works -Canal Syphon Lay out Shape can be circular or rectangular. RCC barrel, pre cast RCC pipes, or masonry etc. Syphon barrel Horizontal under deep bed portion with slope not steeper than 1 in 3 at entry and 1 in 5 at the exit end.

12. CD Works -Canal Syphon The invert level at the entry normally be kept at bed level. The invert level at the exit end be little lower taking into account the loss of head. Transition walls with splay 3:1 and 4:1 at the entry and exit end. Stop log groove Trash Rack Miscellaneous items/works

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