Post-flood field investigation of the June 2020 flash flood in the upper Muráň River basin and the catastrophic flash flood scenario

Pekárová, Pavla; Mészáros, Jakub; Miklánek, Pavol; Pekár, Ján; Siman, Cyril; Podolinská, Jana

doi:10.2478/johh-2021-0015

Cited by 7 publications

(2 citation statements)

References 14 publications

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“…Respecting the need for subjective expert-based interactions when dealing with the above-mentioned problems could bring a partial solution. However, the need for a more objective approach, such as a process analysis using rainfall-runoff modelling (e.g., Földes et al, 2022;Hu et al, 2021;Pekárová et al, 2021), is apparent. From a longer perspective, starting to differentiate flood generation processes within a flood type (e.g., long or short rain floods) may lead to a more advanced process typology, which must be respected when grouping IID events for analysis.…”

Section: Discussionmentioning

confidence: 99%

The testing of a multivariate probabilistic framework for reservoir safety evaluation and flood risks assessment in Slovakia: A study on the Parná and Belá Rivers

Výleta,

Rončák,

Liová

et al. 2023

Journal of Hydrology and Hydromechanics

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Intense floods represent a challenge to risk management. While they are multivariate in their nature, they are often studied in practice from univariate perspectives. Classical frequency analyses, which establish a relation between the peak flow or volume and the frequency of exceedance, may lead to improper risk estimations and mitigations. Therefore, it is necessary to study floods as multivariate stochastic events having mutually correlated characteristics, such as peak flood flow, corresponding volume and duration. The joint distribution properties of these characteristics play an important role in the assessment of flood risk and reservoir safety evaluation. In addition, the study of flood hydrographs is useful because of the inherent dependencies among their practice-relevant characteristics present on-site and in the regional records. This study aims to provide risk analysts with a consistent multivariate probabilistic framework using a copula-based approach. The framework respects and describes the dependence structures among the flood peaks, volumes, and durations of observed and synthetic control flood hydrographs. The seasonality of flood generation is respected by separate analyses of floods in the summer and winter seasons. A control flood hydrograph is understood as a theoretical/synthetic discharge hydrograph, which is determined by the flood peak with the chosen probability of exceedance, the corresponding volume, and the time duration with the corresponding probability. The framework comprises five steps: 1. Separation of the observed hydrographs, 2. Analysis of the flood characteristics and their dependence, 3. Modelling the marginal distributions, 4. A copula-based approach for modelling joint distributions of the flood peaks, volumes and durations, 5. Construction of synthetic flood hydrographs. The flood risk assessment and reservoir safety evaluation are described by hydrograph analyses and the conditional joint probabilities of the exceedance of the flood volume and duration conditioned on flood peak. The proposed multivariate probabilistic framework was tested and demonstrated based on data from two contrasting catchments in Slovakia. Based on the findings, the study affirms that the trivariate copula-based approach is a practical option for assessing flood risks and for reservoir safety.

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Section: Discussionmentioning

confidence: 99%

The testing of a multivariate probabilistic framework for reservoir safety evaluation and flood risks assessment in Slovakia: A study on the Parná and Belá Rivers

Výleta,

Rončák,

Liová

et al. 2023

Journal of Hydrology and Hydromechanics

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“…To simulate flood waves, a conceptual non-linear NLC (non-linear cascade model) rainfall-runoff model was used (Pekárová et al, 2021b). The NLC model is a rainfall-runoff model with lumped parameters to simulate isolated rainfall-runoff events.…”

Section: Methods and Nlc Modelmentioning

confidence: 99%

Post-flood analysis of the flood from the rupture of the stone dam in Rudno nad Hronom on May 17, 2021

Pekárová¹,

Miklánek²,

Pekár³

et al. 2022

AHS

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The study is aimed at reconstructing the course of the flood from May 17, 2021 breach of the stone dam in Rudno nad Hronom. Firstly, the volume of water in the reservoir before its breach was determined. The reservoir storage volume was estimated to be 14 807 m 3 . Then, we focused on the analysis of the hydrological regime in the wider Rudniansky Brook region. In order to derive the flood wave course from the rainfall, a series of 15-minute discharge from neighbouring water gauges measured by the Slovak Hydrometeorological Institute were analysed. In analysing the long-term trends of precipitation and temperature series we used data from the Banská Štiavnica meteorological station (period 1901-2020). In the second part, based on several field measurements after the flood event, we estimated the peak flows of floods from May 17, 2021 above the reservoir and under the reservoir. One hundred meters above the reservoir culmination reached 7.8 m 3 s -1 , under the reservoir it was between 80 to 100 m 3 s -1 . Finally, we reconstructed the course of the flood wave from the precipitation above the reservoir by hydrological analogy and by simple rainfall-runoff hydrological model NLC. The course of the breakthrough wave from the reservoir water just below the dam was determined to be triangular in shape so that the peak reached 90 m 3 s -1 and the volume was 15,000 m 3 .

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Thunderstorm climatology of Slovakia between 1984–2023

Vido,

Borsányi,

Nalevanková

et al. 2024

Theor Appl Climatol

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Thunderstorms are among the most extreme meteorological phenomena that can cause widespread destruction and loss of life. Their occurrence varies significantly across different regions and times of the year. Despite various studies on thunderstorm activity across Central Europe, direct analyses based on data from the Slovak territory still need to be made available. Given Slovakia’s diverse natural conditions, there is a need for detailed knowledge about the frequency and spatial distribution of thunderstorms in this region. To address this knowledge gap, we analysed the frequency and spatiotemporal distribution of days with thunderstorm occurrences in Slovakia between 1984 and 2023, utilising climatological data from the Slovak Hydrometeorological Institute. We limited our analysis to data of days with close thunderstorms (thunderstorms occurring within 3 km of the monitoring station). Our findings reveal a significant variation in thunderstorm occurrences across Slovakia, with peak activity in the summer, especially in June and July. However, the spatial distribution of thunderstorms differed significantly across the country, with the highest frequency observed in mountainous regions and the east-central part of Slovakia. We found significant deceasing signals of the thunderstorm activity trends during the studied period, including analyses during the colder part of the year. Furthermore, our results underscore the critical role of synoptic situations in shaping these trends, where changes in certain atmospheric patterns were closely aligned with variations in thunderstorm frequency. The interaction between these synoptic conditions and regional topography was particularly evident, reinforcing the notion that topographical and environmental complexities substantially contribute to the observed thunderstorm distribution.

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Post-flood field investigation of the June 2020 flash flood in the upper Muráň River basin and the catastrophic flash flood scenario

Cited by 7 publications

References 14 publications

The testing of a multivariate probabilistic framework for reservoir safety evaluation and flood risks assessment in Slovakia: A study on the Parná and Belá Rivers

The testing of a multivariate probabilistic framework for reservoir safety evaluation and flood risks assessment in Slovakia: A study on the Parná and Belá Rivers

Post-flood analysis of the flood from the rupture of the stone dam in Rudno nad Hronom on May 17, 2021

Thunderstorm climatology of Slovakia between 1984–2023

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