-Use the data shown to determine recurrence intervals for the river. This river has had 39 floods over the past 100 years. What is the recurrence interval for the 10th ranked flood?
A) 3
B) 4
C) 5

Question

-Use the data shown to determine recurrence intervals for the river. This river has had 39 floods over the past 100 years. What is the recurrence interval for the 10th ranked flood?
A) 3 
B) 4 
C) 5

Quizplus · Accepted Answer

The recurrence interval is the average number of years between floods of a given magnitude. The 10th ranked flood is the flood that has occurred 10 times in the past 100 years. Therefore, the recurrence interval for the 10th ranked flood is 100 years / 10 = 10 years.

-Use the Data Shown to Determine Recurrence Intervals for the River