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

Phase 1: Comprehend terrace design objectives and constituents.
Terracing involves engineering to manage water runoff and erosion on sloped terrain. Effective design necessitates consideration of the structure's geometry, placement, and hydrological performance.
Phase 2: Assess each listed element.

• A. Appropriate terrace spacing: The vertical and horizontal distance between terraces is crucial for determining the drainage area each must manage, calculated based on soil type, slope gradient, and precipitation patterns.
• B. Terrace placement: Positioning terraces on the landscape, frequently initiated from a key contour or ridge, is foundational to the layout and design process.
• C. Channel design with sufficient capacity: Each terrace incorporates a channel to carry collected runoff. This channel requires precise grading and cross-sectional design to manage peak runoff from its catchment area without overflow or erosion.
• D. Formation of a usable cross-section: The terrace embankment and channel must be shaped for stability and to facilitate efficient and safe farming operations.

Phase 3: Determine the optimal combination.
All four elements are indispensable for a complete and effective terrace design.