Characteristics of extreme heavy precipitation events occurring in the area of Cracow (Poland)

Andrzej Walega and Boguslaw Michalec
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Andrzej Walega: Faculty of Environment Engineering and Geodesy, University of Agriculture, Cracow, Poland
Boguslaw Michalec: Faculty of Environment Engineering and Geodesy, University of Agriculture, Cracow, Poland

Soil and Water Research, 2014, vol. 9, issue 4, 182-191

Abstract: The variability of extremely heavy precipitation events with duration of 120 min occurring in the area of Cracow, southern Poland was assessed. The analysis was performed using time series of maximum annual precipitation events with durations t = 5, 10, 15, 30, 60, and 120 min, recorded at the Botanical Garden station at the Jagiellonian University in the period of 1906-1990. The periodicity of precipitation was analyzed using the autocorrelation function and Fourier spectral density analysis. The Probable Maximum Precipitation (PMP) was calculated by Hershfield's statistical method. The analysis of the autocorrelation function of sequences and the Fourier spectral density revealed a clear periodicity of the maximum precipitation. For precipitation with t = 60 min, the maximum values occur every 9 years, but also shorter periods (3-year) may be observed. The PMP values calculated for Cracow differ significantly from the values calculated using the probability distribution, as well as from the ones observed and they increase with increasing precipitation duration. The differences between the PMP and probable as well as observed precipitation tend to decrease with increasing duration of precipitation.

Keywords: autocorrelation; Hershfield's statistical method; probability distribution; probable maximum precipitation; spectral analysis (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlswr:v:9:y:2014:i:4:id:99-2013-swr

DOI: 10.17221/99/2013-SWR

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