Question

Match the LIST-I with LIST-II

LIST-I	LIST-II
A. Slip Erosion B. Erosivity C. Gully Erosion D. Wind Erosion	I. Ravines II. Landslides III. Saltation IV. EI30 index

Choose the correct answer from the options given below:

• A. A-II, B-IV, C-I, D-III
• B. A-IV, B-I, C-II, D-II
• C. A-I, B-II, C-III, D-IV
• D. A-II, B-I, C-IV, D-III

Hint:

Important erosion associations: \[ \boxed{ \text{Slip erosion} \rightarrow \text{Land slides} } \] \[ \boxed{ \text{Gully erosion} \rightarrow \text{Ravines} } \] \[ \boxed{ \text{Wind erosion} \rightarrow \text{Saltation} } \] \[ \boxed{ \text{Erosivity index} \rightarrow EI_{30} } \]

Answer 1

The Correct Option is A

Concept: Different forms of soil erosion are associated with specific physical mechanisms and characteristic landforms. Similarly:
• Rainfall erosivity is measured using erosivity indices
• Wind erosion involves movement of particles through different transport mechanisms This question tests conceptual matching between erosion terminology and associated phenomena.

Step 1: Matching Slip Erosion. Slip erosion occurs when:
• Large masses of soil move downward along a slope
• Soil loses stability due to saturation or gravity This phenomenon is commonly associated with: \[ \boxed{ \text{Land Slides} } \] Thus: \[ \boxed{ A \rightarrow II } \]

Step 2: Matching Erosivity. Rainfall erosivity represents the capacity of rainfall to cause erosion. The most common erosivity index is: \[ \boxed{ EI_{30} } \] where:
• \(E\) = rainfall kinetic energy
• \(I_{30}\) = maximum 30-minute rainfall intensity Thus: \[ \boxed{ B \rightarrow IV } \]

Step 3: Matching Gully Erosion. Gully erosion is the advanced stage of water erosion producing:
• Deep channels
• Ravines
• Severe land degradation Hence: \[ \boxed{ \text{Gully erosion forms ravines} } \] Thus: \[ \boxed{ C \rightarrow I } \]

Step 4: Matching Wind Erosion. Wind erosion transports soil particles through:
• Suspension
• Saltation
• Surface creep Among these, saltation is the most dominant movement mechanism. Thus: \[ \boxed{ D \rightarrow III } \]

Step 5: Writing the final matching. The complete matching becomes: \[ \boxed{ A-II,\; B-IV,\; C-I,\; D-III } \]

Step 6: Comparing with the options. Option (A): \[ A-II,\; B-IV,\; C-I,\; D-III \] Perfectly matches all correct pairs. Hence: \[ \boxed{\text{Option (A) is correct}} \] Option (B): Incorrect matching. Hence: \[ \boxed{\text{Option (B) is incorrect}} \] Option (C): Incorrect arrangement. Hence: \[ \boxed{\text{Option (C) is incorrect}} \] Option (D): Incorrect matching. Hence: \[ \boxed{\text{Option (D) is incorrect}} \] Final Conclusion: Correct matching is: \[ \boxed{ A-II,\; B-IV,\; C-I,\; D-III } \] Hence the correct answer is: \[ \boxed{ (A) } \]