FLOOD FREQUENCY ANALYSIS OF OSSE RIVER WITH A THRESHOLD VALUE USING EXTREME VALUE TYPE 1 DISTRIBUTION
Keywords:
Probability, Flood Frequency Analysis, Recurrent Interval, Method of Moment, Extreme Value Type1Abstract
This paper analyzes flood frequency using discharge data from Osse River with flow measurements carried out at-site station Iguoriakhi for 20 years’ period (1994-2013). Some basic statistics and goodness of fit test of the datasets were examined. The
recurrent interval T and the probabilities for different years return period were shown. Using the method of moment for parameters estimates and with a threshold value, the extreme value type1 distribution was used to predict the future maximum
flood peak starting from 1.2years up to 50years.
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