Which of the following is true of a 100-year flood?
A)A 100-year flood occurs every 100 years on a given stream.
B)The probability of a 100-year flood occurring on any given year is 1:100.
C)A 100-year flood cannot occur twice within 10 years.
D)The probability of a 100-year flood is related to how recently the last 100-year flood occurred.

Question

Quizplus · Accepted Answer

A 100-year flood refers to flooding that has a 1% chance of occurring in any given year. It does not mean that it only occurs once every 100 years, and it is not related to how recently the last 100-year flood occurred. Additionally, there is no guarantee that a 100-year flood cannot occur twice within 10 years - it is simply a low probability event.

Which of the Following Is True of a 100-Year Flood