GATE CE 2019 Set 1 — Question 24

MCQ+1 / -0.33EasyCross Drainage StructuresCanals & Hydraulic StructuresWater Resources Engineering

Water Resources Engineering → Canals & Hydraulic Structures → Cross Drainage Structures

Last updated 5 September 2026

Question

If the path of an irrigation canal is below the bed level of a natural stream, the type of cross-drainage structure provided is

Correct answer (D) Super passage Solution Cross-drainage structures are classified based on the relative levels of the canal and the drainage (natural stream): 1. Aqueduct : Canal bed is above the drainage HFL (High Flood Level). 2. Syphon Aqueduct : Canal bed is above the drainage bed, but the drainage water flows under pressure (HFL is above canal bed). 3. Super Passage : Drainage bed is above the canal FSL (Full Supply Level). The canal path is below the bed level of the stream. 4. Canal Syphon : Drainage bed is above the canal bed, but the canal water flows under pressure. 5. Level Crossing : Canal and drainage intersect at the same level. Since the canal path is below the bed level of the natural stream, the structure is a Super passage . Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) Super passage Solution Cross-drainage structures are classified based on the relative levels of the canal and the drainage (natural stream): 1. Aqueduct : Canal bed is above the drainage HFL (High Flood Level). 2. Syphon Aqueduct : Canal bed is above the drainage bed, but the drainage water flows under pressure (HFL is above canal bed). 3. Super Passage : Drainage bed is above the canal FSL (Full Supply Level). The canal path is below the bed level of the stream. 4. Canal Syphon : Drainage bed is above the canal bed, but the canal water flows under pressure. 5. Level Crossing : Canal and drainage intersect at the same level. Since the canal path is below the bed level of the natural stream, the structure is a Super passage .

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