Impact of Changes in Short-Term Rainfall on Design Floods: Case Study of the Hnilec River Basin, Slovakia

Földes, Gabriel; Labat, Marija Mihaela; Kohnová, Silvia; Hlavčová, Kamila

doi:10.2478/sjce-2022-0008

Cited by 4 publications

(3 citation statements)

References 41 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

Self Cite

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“…It considers the given type of soil with a particular slope and the length of the slope and a specific system of growing crops, cultivating soil, and applying anti-erosion measures. Intense shortterm rain plays an important role in the method (Impact of Changes in Short-Term Rainfall, e.g., Földes et al 2022). The equation cannot be used for a period shorter than one year and also not for calculating soil loss from an individual rainfall or runoff from melting snow.…”

Section: The Usle Modelmentioning

confidence: 99%

Assessment of the impact of the accuracy of the DMR on the calculation of soil erosion using the USLE and USLE-2D models

Kohutová,

Tomaščík,

Danáčová

et al. 2023

AHS

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Slovakia has recorded a potentially significant increase in water erosion, especially after consolidating the plots of hundreds of hectares of agricultural area with monocultures of marketable crops. This is also due to large blocks of land being created on sloping sites. Due to its simplicity, the Universal Soil Loss Equation (USLE) is most commonly used to calculate potential soil erosion. This study compares the classical USLE and the USLE-2D methods, which consider the combined spatially variable slope length and steepness. The slope length is replaced in USLE-2D by the contributing area based on a raster digital model relief model. Data from Tulčík cadastre in east Slovakia demonstrates the results of water erosion on 26 plots used as agricultural areas. As expected, differences were found, which were further analysed concerning slope lengths and steepness. Comparing the grid size (1, 10 and 20 m) for the USLE-2D model showed that more significant differences were obtained for plots with a smaller area and a higher slope. It was confirmed that at a lower pixel resolution, the results are overestimated.

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“…Previous research on soil erosion in Slovakia has been carried out by many authors, especially Rattayova et al (2019), Petríkovičová et al (2020), and Jenčo et al (2020). Földes et al (2022) also dealt with changes in short-term rainfall on design floods and erosion control in Slovakia. A study of topsoil moisture regimes through an effective rainfall index was provided by Rončák et al (2021).…”

Section: Introductionmentioning

confidence: 99%

Effects of the application of biochar on the soil erosion of plots of sloping agricultural and with silt loam soil

Rončák,

Németová,

Vitková

et al. 2023

Journal of Hydrology and Hydromechanics

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The application of biochar is considered to be a beneficial strategy for improving soil ecosystem services. The objectives of this study are to evaluate the differences in the soil erosion of silt loam soil with or without the application of biochar and to compare the impact of the application of biochar on soil erosion for different agricultural practices, namely, bare soil, silage corn, and sown peas. Specifically, the physically-based EROSION 3D model was used to estimate the soil erosion of small plots of sloping agricultural land. In considering various combinations of agricultural practices and rainfalls with different durations and intensities, several scenarios were used to assess the impact of the application of biochar on soil erosion. The results of this study demonstrate that the highest mean values of mean soil erosion in the case study area were simulated without using any biochar on bare soil. The values of the mean soil erosion were reduced with the use of biochar. The effect of the application of biochar was shown for all types of agricultural practices; above all, it reduced soil erosion that occurred above high values (over 30 t ha–1). Although the application and reapplication of biochar showed promise in reducing soil erosion, further research is needed to gain a deeper understanding of its total effects.

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Impact of Changes in Short-Term Rainfall on Design Floods: Case Study of the Hnilec River Basin, Slovakia

Cited by 4 publications

References 41 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

Assessment of the impact of the accuracy of the DMR on the calculation of soil erosion using the USLE and USLE-2D models

Effects of the application of biochar on the soil erosion of plots of sloping agricultural and with silt loam soil

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