Question

Terracing is an effective method of soil conservation in -

• A. Hilly area
• B. Plain area
• C. Desert area
• D. Coastal regions

Hint:

Remember that terracing "slows and sinks" water.
In hilly terrains, gravity is the enemy of soil; terracing acts as a physical barrier to gravity-driven runoff.
It turns a "vertical" problem into a "horizontal" solution.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks to identify the specific geographical region where terracing is utilized as a primary technique for soil conservation.
Terracing is a landscape modification used to manage water runoff and prevent the loss of topsoil.
Detailed Explanation:

• Definition and Purpose of Terracing:
Terracing involves the creation of horizontal steps or platforms on the sides of hills or mountains.
These steps are often supported by stone walls or earth banks to provide a level surface for farming.
The primary purpose is to reduce the length and steepness of a slope, thereby controlling the velocity of surface runoff.

• Mechanism of Soil Conservation:
On steep slopes, rainwater gains significant kinetic energy as it flows downward, leading to high erosive power.
By breaking a single steep slope into several flat "steps," terracing forces water to stop or slow down at each level.
This allows the water more time to infiltrate into the soil, recharging groundwater and reducing the volume of water flowing off the land.
Reduced runoff velocity directly leads to a decrease in the displacement and transport of fertile topsoil.

• Suitability Analysis:
Plain areas: These regions have naturally low slopes, so the velocity of runoff is not high enough to warrant the high labor cost of terracing.
Desert areas: Soil conservation here focuses on wind erosion (shelterbelts) rather than water-induced slope erosion.
Coastal regions: Conservation usually involves managing salinity and coastal erosion caused by waves.
Hilly areas: These are characterized by high gradients where gravity-driven water erosion is the most severe threat to agriculture.

• Types of Terraces:
Bench terraces are common on very steep slopes (up to 33%), transforming them into a series of level strips.
Graded terraces are used to lead excess water to a protected outlet at a non-erosive velocity.

Step 2: Final Answer:
Terracing is specifically designed to tackle the challenges of steep gradients found in hilly regions.
Therefore, it is most effective and essential in hilly areas.