Question

Riparian Erosion occurs at

• A. Clear cut forest land
• B. Harvested croplands
• C. Banks of streams
• D. Places having excessive grazin

Hint:

Maintaining healthy riparian buffer zones (strips of native trees and shrubs along stream banks) is a key bio-engineering practice used to prevent bank erosion and improve water quality.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The term "riparian" refers to the transitional interface zone between terrestrial land and a river, stream, or other flowing water body.
Riparian zones are ecologically dynamic areas that help stabilize riverbanks and filter runoff.

Step 3: Detailed Explanation:
Let us examine the environmental contexts of different types of soil erosion:
1. Clear-cut forest land & Harvested croplands:
Erosion in these areas is driven by wind or rain on bare soil, leading to sheet, rill, or gully erosion.
Thus, Options (A) and (B) are incorrect.
2. Banks of streams:
Riparian erosion is the physical wearing away and loss of soil along the banks of rivers, streams, and creeks.
This is caused by the hydraulic action of flowing water, especially during high-flow or flood events.
Removing native vegetation from these zones weakens the root systems that hold the bank soil together, accelerating bank collapse.
3. Places having excessive grazing:
Overgrazing leads to pasture degradation, soil compaction, and general wind/water erosion, but it is not called riparian erosion unless it occurs directly on stream banks.
Thus, Option (D) is incorrect.

Step 4: Final Answer:
Riparian erosion occurs specifically at the banks of streams.
Therefore, the correct option is (C).