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Question
Recorded annual maximum 24-hour rainfall magnitudes at station 'X' are as under :
What is the return period, in years, for a 6.0 cm annual rainfall according to (i) Hazen formula; and (ii) Weibull formula respectively?
A.
10/7, 3/2
B.
3/2, 10/7
C.
10/7, 7/4
D.
None of the above
Answer ( Option A)

10/7, 3/2

Solution

Arranging the data in descending order
Return period for 6.0 cm annual rainfall using 
(i) Hazen formula
(ii)    Weibull formula
Hence, the correct answer is (a).

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