Allied & ICAR Exam Bank • ALLIED_0893
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 Universal Soil Loss Equation (RUSLE2), the soil erodibility factor $K$ is modeled as a dynamic variable that:
Options:
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(A) Varies seasonally throughout the year with freeze-thaw cycles, soil moisture, and antecedent temperature
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(B) Remains strictly constant forever
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(C) Is always zero in clay soils
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(D) Depends only on wind speed
Step-by-Step Solution & Explanation
RUSLE2 accounts for temporal soil condition fluctuations, adjusting $K$ monthly to reflect soil reconsolidation, frost heave, and biological activity.
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