Multiple choice general knowledge science & technology

A particular stream has a 47-year record of peak discharges available on the Internet. What is the recurrence interval of the 4th-ranked flood in this record?

  1. 12 years

  2. 188 years

  3. 10.75 years

  4. 4 times every 100 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The recurrence interval is calculated as (N+1)/M where N is years of record and M is rank. For 47 years and 4th rank: (47+1)/4 = 48/4 = 12 years. This is the standard Weibull plotting formula used in hydrology.

Keep practicing — related questions