Question

Drop spillway is adopted up to {

• A. 1.0 m
• B. 2.0 m
• C. 3.0 m
• D. 4.0 m

Hint:

Drop Spillway $\le$ 3m. If it’s higher, you need to "chute" it down (Chute spillway).

Answer 1

The Correct Option is C

Step 1: Concept Spillways are structures used to safely convey water from a higher elevation to a lower one, preventing erosion in soil conservation channels.

Step 2: Meaning Different types of spillways are chosen based on the "head" or the vertical distance the water falls.

Step 3: Analysis A drop spillway (specifically the straight-drop type) is typically used for low-head structures. It is technically and economically suitable for drops up to 3 meters. For drops higher than this, chute spillways are usually preferred.

Step 4: Conclusion The limit for adopting a drop spillway is 3.0 m.
Final Answer: (C)