Question

Identify the cross-drainage work in the figure. \includegraphics[width=0.5\linewidth]{image4.png}

• A. Super passage
• B. Aqueduct
• C. Siphon aqueduct
• D. Level crossing

Hint:

To identify cross-drainage works: - Canal over drainage $\Rightarrow$ Aqueduct.
- Drainage over canal $\Rightarrow$ Super passage.
- Canal below drainage under pressure $\Rightarrow$ Siphon aqueduct.
- Canal and drainage at same level $\Rightarrow$ Level crossing.

Answer 1

The Correct Option is A

Step 1: Recall definitions of cross-drainage works.
- Aqueduct: Canal passes over the drainage.
- Super passage: Drainage passes over the canal.
- Siphon aqueduct: Canal passes below drainage under pressure flow (siphonic condition).
- Level crossing: Both canal and drainage meet at the same level and cross each other.

Step 2: Analyse the figure.
The figure shows the canal flowing below, while the drainage/natural stream flows above it at a higher level.
The High Flood Level (HFL) of the drainage is clearly above the Full Supply Level of the canal.
This matches the definition of a super passage, where the drainage is carried over the canal.

Step 3: Eliminate other options.
- Not an aqueduct (because in aqueduct, the canal passes above drainage).
- Not a siphon aqueduct (no siphonic pressure flow in canal).
- Not a level crossing (levels are not same).
Hence, the correct answer is Super passage.
\[ \boxed{\text{Super passage}} \]