Question

Bench terrace sloping outwards are effective only in

• A. High rainfall area
• B. Low rainfall area
• C. Medium rainfall area
• D. Heavy rainfall area

Hint:

Terracing:
- Outward sloping: Heavy rainfall (drainage).
- Inward sloping: Low rainfall (moisture conservation).
- Level terraces: Medium rainfall.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
This question tests knowledge of terrace design for different rainfall conditions.

Step 2: Detailed Explanation:
Bench terraces sloping outwards are effective only in heavy rainfall areas (D).
Outward-sloping terraces are designed to drain excess water quickly.
They prevent waterlogging and soil erosion in high rainfall regions.
In other rainfall conditions:
- High rainfall (D): Effective.
- Low rainfall (B): Not needed.
- Medium rainfall (C): May not be necessary.
Thus, outward-sloping bench terraces are used in heavy rainfall areas.

Step 3: Final Answer:
Thus, bench terraces sloping outwards are effective only in heavy rainfall areas, which corresponds to option (D).
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