To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood series
i. mean value
ii. standard deviation
iii. length of record
iv. coefficient of skew
The correct answer is
A)(i) and (ii)
B)(i),(ii) and (iii)
C)(i), (ii) and (iv)
D)(i), (ii), (iii) and (iv)

Question

Quizplus · Accepted Answer

Gumbel's distribution method for estimating the magnitude of a flood with a specific return period primarily requires the mean value, standard deviation, and length of the record of annual flood series. The coefficient of skew is not a necessary parameter for Gumbel's method, which focuses on extreme value analysis using the mean, standard deviation, and sample size to estimate flood magnitudes.

To Estimate the Magnitude of a Flood with a Return