Question

The design of a terrace involves:
A. Proper spacing of terraces
B. Location of terrace
C. Design of channel with adequate capacity
D. Development of farmable cross section
Choose the correct answer from the options given below:

• A. A, B and D only
• B. A, B and C only
• C. A, B, C and D
• D. B, C and D only

Hint:

Terrace design is a complete package. You must decide where to put them (Location), how far apart they should be (Spacing), what shape they should have (Cross section), and ensure they can handle the water (Channel capacity).

Answer 1

The Correct Option is C

Step 1: Understand the purpose and components of terrace design.
Terracing is an engineering practice to control runoff and erosion on sloping land. A complete design must consider all aspects of the structure's geometry, location, and hydraulic function.
Step 2: Evaluate each component listed.
- A. Proper spacing of terraces: The vertical and horizontal spacing between terraces is critical. It determines how much area each terrace must handle and is calculated based on soil type, slope, and rainfall.
- B. Location of terrace: The placement of terraces on the landscape, often starting from a key contour or ridge line, is a fundamental part of the layout and design process.
- C. Design of channel with adequate capacity: Each terrace includes a channel to convey the collected runoff. This channel must be designed with the correct grade and cross-section to handle the peak runoff from its contributing area without overtopping or causing erosion.
- D. Development of farmable cross section: The terrace bund and channel must be shaped in a way that is stable and allows for farming operations to be carried out efficiently and safely.
Step 3: Conclude the correct combination.
All four elements are essential components of a comprehensive and functional terrace design.