Behaviour of Composite Beams With Embedded Compression Flange

The term "outlier" is generally used to refer to single data points that appear to depart significantly from the trend of the other data. Outliers are classified into three types: incorrect observations, rare events resulting from essentially the same phenomena as the other maxima, and rare events resulting from a different phenomenon. Flood frequency analysis was first performed on complete data series (including the outlier) and then on the series with the outlier removed. Results revealed that omission of the outlier data didn’t affect the probability distribution function (Log-Pearson type III), but the design discharge reduced by 60 percent in 10000 year return period from 3320 (m3/s) to 1340 (m3/s). Furthermore, the method proposed by the U.S. Water Resources Council (WRC), and the HEC-SSP software were applied in order to compose outlier data with other systematic data and to modify the parameters of the statistical distribution. Using WRC method, the estimated 10000-year flood was equaled to 1907 (m3/s) by designating the outlier as the 200-year return period and revising the parameters of Log-Pearson type III distribution; that is about 43 percent decrease over the scenario involving the outlier.

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The Effect of Involving Exceptional Outlier Data on Design Flood Magnitude

Heidarpour

Saghafian

Golian

2015

Curr. World Environ

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Behaviour of Composite Beams With Embedded Compression Flange

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The Effect of Involving Exceptional Outlier Data on Design Flood Magnitude

The Effect of Involving Exceptional Outlier Data on Design Flood Magnitude

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