Allied & ICAR Exam Bank • ALLIED_0895 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Soil Erosion Mechanics and USLE

Subtopic: Soil Erosion Mechanics and USLE

Question Statement:

In the Revised Wind Erosion Equation (RWEQ), soil crusting by rainfall:

Options:

  • (A) Significantly decreases wind erodibility by binding loose particles into a consolidated cohesive surface crust
  • (B) Increases wind erosion by 500%
  • (C) Has zero effect on erosion
  • (D) Converts sand into dust instantly

Answer Key:

A

Step-by-Step Solution & Explanation

Raindrop impact puddling and subsequent solar drying forms a surface crust that raises critical threshold shear velocity, drastically suppressing detachment.
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