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Hydrology & Irrigation

Probable Maximum Precipitation

The Gumbel's ...

Question

The Gumbel's reduced variate for the flood having return period of 100 years is

A

4.6

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B

1.0

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C

2.3

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D

8.6

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Solution

The correct option is A 4.6
Return period T = 100 years
$V_{i} = Reduced variate = - l n l n (\frac{T}{T - 1})$

$Y_{i} = - l n l n (\frac{100}{99}) = 4.6$

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