Allied & ICAR Exam Bank • ALLIED_0889 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrology and Runoff

Question Statement:

Philip's two-parameter infiltration equation expresses cumulative infiltration $I$ at time $t$ as:

Options:

  • (A) $I = S t^{1/2} + A t$
  • (B) $I = S t + A t^2$
  • (C) $I = S \ln(t) + A$
  • (D) $I = S e^{-A t}$

Answer Key:

A

Step-by-Step Solution & Explanation

Philip derived $I = S t^{1/2} + A t$, where $S$ is sorptivity (capillary suction dominant at small $t$) and $A$ is transmissivity factor (gravity dominant at large $t$).
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