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  • Author or Editor: Silvia Kohnová x
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Abstract

The paper focuses on future changes in the short-term rainfall intensities in the western region of Slovakia. The analysis was performed for 4 climatological stations, namely: Malacky, Myjava, Vrbovce and šaŠtín. The short-term rainfall intensity data from the community land model that is a regional climate model were used in durations of 60 to 1440 minutes for a warm period. The focus was aimed at comparing changes in rainfall characteristics, especially changes in the seasonality and trends and changes in the scaling exponents and design values.

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The study focuses on an analysis of the future changes in short-term rainfall in the southwestern region of Slovakia. The analysis was performed for three climatological stations, i.e. Bratislava-Koliba, Gabčíkovo and Sereď, where short-term rainfall intensities with durations of 60 to 1440 minutes were analyzed using historical observations and future regional climate models. The study focuses on detecting changes in rainfall trends and changes in the values of the scaling coefficients. In final, there is a comparison of the design values of short-term rainfall derived for a future horizon with historical observations and the conclusion that rainfall intensities in the region analyzed will increase in the future and that this should be taken into consideration when designing water structures to ensure their safety.

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Authors: David Honek, Zuzana Németová, Silvia Kohnová and Monika Šulc Michalková

Abstract

The modeling of soil erosion processes is affected by several factors that reflect the physical-geographic conditions of the study site together with the land use linkage. The soil parameters are significant in the modeling of erosion and also runoff processes. The correct determination of a soil's parameters becomes a crucial part of the model's calibration. This paper deals with a sensitivity analysis of seven soil input parameters to the physically-based Erosion 3D model. The results show the variable influence of each soil parameter. The Erosion 3D model is very sensitive to initial soil moisture, bulk density, and erodibility.

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Authors: Marija Mihaela Labat, Lenka Korbeľová, Silvia Kohnová and Kamila Hlavčová

The aim of this paper is an assessment of the susceptibility of soil to soil erosion, proposed measures against soil erosion, and an assessment of their effect on the reduction of peak flows. The area of interest is the Halúzníkov Creek basin. The calculations of the soil loss from water erosion were done using the universal soil loss equation and universal soil loss equation 2D methods; for estimating design floods, the curve number method was applied. For reducing the soil loss to tolerance values, strip cropping measures on agricultural fields were proposed. After applying the strip cropping measures, the design flood peaks were also reduced.

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Authors: Zuzana Németová, David Honek, Tamara Látková, Monika Šulc Michalková and Silvia Kohnová

The scope of this study is an evaluation of potential soil water erosion using the physically-based erosion model, EROSION-3D. This model is event-based and calculates soil water erosion during an actual measured rainfall event. The calculations of the erosion model take advantage of a digital elevation model, precipitation and soil parameters, which are established in a specific parameter catalogue. The soil water erosion was modeled in two small catchments in the Myjava Hill Land (Slovakia), using 9 soil moisture scenarios and two different crops on arable areas. When considering the last 35 years of rainfall records at the Myjava meteorological station, three storm rainfall events were applied in the modeling. The results were statistically analyzed to figure out the differences between the model’s functional possibilities; the modeling under the various scenarios proved a strong interaction between the values of the input factors and the results of the soil erosion.

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