What type of cross drainage work is provided when the canal runs below the drain, with FSL of canal well below the bed of the drain?a)Aqueductb)Super passagec)Level crossingd)Siphon aqueductCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

The hydraulic structure in which the drainage is passing over the irrigation canal is known as super 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.
Types of Cross - Drainage Works:
(1) Type I (Irrigation canal passes over the drainage)
(a) Aqueduct
(b) Siphon aqueduct
(2) Type II (Drainage passes over the irrigation canal)
(a) Super passage
(b) Siphon super passage
Super Passage
In the super passage, the bed level of the drainage is above the full supply level of the canal.
The super passage is just the opposite of the aqueduct.
The canal flows at atmospheric pressure under the work.

Answer

Super passage
The type of cross drainage work provided when the canal runs below the drain, with FSL of the canal well below the bed of the drain is known as a super passage.
Below are some key points to explain the concept in detail:

Definition:
- A super passage is a structure constructed to allow the canal to pass below the drain with the FSL (Full Supply Level) of the canal situated well below the bed level of the drain.

Function:
- The primary function of a super passage is to facilitate the flow of water in the canal under the drain without any obstruction, ensuring smooth drainage.

Design:
- Super passages are designed in such a way that the canal bed is placed lower than the drain bed to allow the water to flow freely without causing any backflow or flooding.

Construction:
- Super passages are typically constructed using durable materials such as concrete or steel to ensure long-term stability and functionality.

Advantages:
- Super passages help in maintaining the hydraulic gradient of the canal, ensuring efficient water flow.
- They reduce the risk of canal water overflowing or causing damage to the drain structure.
In conclusion, super passages are essential cross drainage structures that play a crucial role in ensuring the smooth flow of water in canals under drains, especially when the canal's FSL is significantly below the drain bed level.

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What type of cross drainage work is provided when the canal runs below the drain, with FSL of canal well below the bed of the drain?

What type of cross drainage work is provided when the canal runs below the drain, with FSL of canal well below the bed of the drain ?

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