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 has a 1% chance of occurring in any given year, so the probability of it occurring in a particular year is 1:100. A 100-year flood is not based on a precise time frame and can occur more frequently than once every 100 years. Therefore, options A and C are incorrect. Option D is also incorrect as the probability of a 100-year flood does not change based on when the last occurrence happened.

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