Practice Quiz

Civil Engineering PE

Category - Hydrology

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How is the concept of a 50-year design recurrence interval explained to the general public?
  1. 2% chance storm
  2. May occur several times in a 50-year period
  3. May occur 50 times in a given year
  4. None of the above
Explanation
Answer: A - The concept of a 50-year design recurrence interval is explained as a 2% chance storm event to the general public. For a 50-year recurrence interval, the probability of equaling or exceeding the resultant storm flow is 2%. A recurrence interval is not the actual interval for which a storm is expected to occur, but rather the probability that a storm event of a given magnitude is going to occur in any given year.
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