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Extreme Hydrological Situations on Danube River-Case Study Bezdan Hydrological Station (SERBIA)

Author(s): M. Urosev; I. Lescesen; D. Strbac; D. Dolinaj

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Abstract: In this paper we analyzed extreme hydrological situations on Danube River at Bezdan for the1931–2014 period. Floods and hydrological droughts were defined as events over and below selected threshold levels respectively. The magnitudes (volumes) and durations of floods and droughts were analyzed by annual maximum (AMS) and partial duration series (PDS) methods. In flood frequency analysis of the AMS LogPearson 3 distribution has the best agreement with empirical data for both volumes and durations, while for hydrological droughts it was the Pearson 3 distribution for Q 90 threshold and Log-Pearson 3 for Q 95 threshold. In flood frequency analyses of the PDS joint distribution of Poisson and Weibull (P+W) fits the empirical distribution of largest volumes and durations, while for hydrological droughts best distribution depends on selected threshold levels. Comparative view of calculated return periods by AMS and PDS methods for both floods and hydrological droughts is presented.

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Year: 2016

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