Allied & ICAR Exam Bank • ALLIED_0415 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrology and Runoff

Question Statement:

The return period of a flood is $T = 50\text{ years}$. The probability that this flood will NOT occur in any given year $q = 1 - 1/T = 1 - 0.02 = 0.98$. The probability that this flood will NOT occur at all during a $2\text{-year}$ period $q^2 = (0.98)^2$ is (rounded off to four decimal places):

Answer Key:

0.9604

Step-by-Step Solution & Explanation

$q^2 = (0.98)^2 = 0.9604$.
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