Civil Engineering - Irrigation - Discussion

The hydraulic structure in which the drainage is passing over the irrigation canal is known as the Super Passagesuper passage. This structure is suitable when the bed level of drainage is above the flood surface level of the canal. The water of the canal passes clearly below the drainage.

A super passage is similar to an aqueduct, except in this case the drain is over the canal.

The FSL of the canal is lower than the underside of the trough carrying drainage water. Thus, the canal water runs under gravity.

Canal syphon should be the absolute correct statement but not given in option, so super passage should be marked, but in super passage flow in canal is under gravity not in pressure.

A is the correct answer.

@Srk.

Here, it is mentioned that F.S.L. does not touch, hence it is atmospheric pressure only. Therefore there is no symphonic action.

I think it should be syphon.

Thanks.

Then why "Flowing under pressure" is given here?

When canal passes below the Drainage is Called Super-passage.

How possible? Explain the answer.

Please, describe briefly.