Practice Question: Calculating Probability of a Storm Event Based on Return Period

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Solution

The probability of occurance of the rainfall is given by:

\[P=\frac{1}{T}\]

Where T=return period in years.

 

\[P=\frac{1}{20}=0.05\]

 

The probability that this rainfall intensity will be attained in three consective years is:

 

\[0.05\times 0.05\times 0.05=1.25\times {10}^{-4}\]

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