Twenty centimeters of precipitation fell in one day on a southern city in the 100-years climatic records for this city.This rainfall event ranked fifth among all one day precipitation events for this city.The return period for this extreme rainfall event would be
A)4 years.
B)5 years.
C)20 years.
D)100 years.

Question

Quizplus · Accepted Answer

The return period for an extreme rainfall event can be calculated using the following formula: Return Period = (n + 1) / m, where n is the number of years of record and m is the rank of the event. In this case, n=100 and m=5 (since it's the fifth highest rainfall event). Therefore, Return Period = (100 + 1) / 5 = 20. So, the return period for this extreme rainfall event is 20 years.

Twenty Centimeters of Precipitation Fell in One Day on a Southern