Best Fit versus Default Distribution and the Impact on the Reliability over the Design Lifetime of Hydraulic Structures
Received: 16 December 2022 | Revised: 29 December 2022 and 6 January 2023 | Accepted: 7 January 2023 | Online: 21 January 2023
Corresponding author: Farida Krimil
Abstract
In the present study, Flood Frequency Analysis (FFA) is performed on the daily inflows of a reservoir dam taken as a case study. The Peaks-Over-Threshold (POT) approach was adopted. A comparison between the default generalized Pareto distribution and the best distribution fitted to the data has been carried out. After the risk analysis, the reliability of the structure decreases to 25.60% for the chosen threshold values if the best distribution is adopted instead of the default fit.
Keywords:
flood frequency analysis, peaks-over-threshold, Pareto distribution, best fit, risk analysisDownloads
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