Patrik Sleziak

Patrik Sleziak
Slovak Academy of Sciences | SAV · Department of Mountain Hydrology

PhD.

About

35
Publications
5,018
Reads
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132
Citations
Additional affiliations
September 2016 - February 2017
Vienna University of Technology
Position
  • scholar on the research stay
May 2015 - October 2015
Vienna University of Technology
Position
  • scholar on the research stay
Education
September 2017 - May 2019
VŠB-Technical University of Ostrava
Field of study
  • Geoinformatics
September 2013 - August 2017
Slovak University of Technology in Bratislava
Field of study
  • Water Resources Engineering
September 2007 - June 2012
Slovak University of Agriculture in Nitra
Field of study
  • Landscape Engineering

Publications

Publications (35)
Article
Full-text available
In a previous study, the topsoil and root zone ASCAT satellite soil moisture data were implemented into three multi-objective calibration approaches of the TUW hydrological model in 209 Austrian catchments. This paper examines the model parametrization in those catchments, which in the validation of the dual-layer conceptual semi-distributed model...
Article
Full-text available
The role of soil moisture is widely accepted as a significant factor in the mass and energy balance of catchments as a controller in surface and subsurface runoff generation. The paper examines the potential of a new dataset based on advanced scatterometer satellite remote sensing of soil moisture (ASCAT) for multiple objective calibrations of a du...
Article
Full-text available
The changing climate is a concern with regard to sustainable water resources. Projections of the runoff in future climate conditions are needed for long-term planning of water resources and flood protection. In this study, we evaluate the possible climate change impacts on the runoff regime in eight selected basins located in the whole territory of...
Article
Full-text available
The interception process in subalpine Norway spruce stands plays an important role in the distribution of throughfall. The natural mountain spruce forest where our measurements of throughfall and gross precipitation were carried out, is located on the tree line at an elevation of 1,420 m a.s.l. in the Western Tatra Mountains (Slovakia, Central Euro...
Article
A conceptual rainfall-runoff model was used for estimating the impact of climate change on the runoff regime in the Myjava River basin. Changes in climatic characteristics for future decades were expressed by a regional climate model using the A1B emission scenario. The model was calibrated for 1981–1990, 1991–2000, 2001–2010, 2011–2019. The best s...
Article
The Jalovecký Creek catchment, Slovakia (area 22.2 km², mean elevation 1500 m a.s.l.), is likely the last big valley complex in the Carpathian Mountains, in which the hydrological cycle is still governed by natural processes. Hydrological research is conducted there since the end of the 1980s. The overall mission of the research is to increase the...
Article
Full-text available
The objective of this study is to examine the impact of the number of calibration repetitions on hydrologic model performance and parameter uncertainty in varying climatic conditions. The study is performed in a pristine alpine catchment in the Western Tatra Mountains (the Jalovecký Creek catchment, Slovakia) using daily data from the period 1989–2...
Article
Full-text available
18 O in precipitation at station Liptovský Mikuláš (about 8.5 km south from the outlet of the Jalovecký Creek catchment) remains constantly higher since 2014 that might be related to greater evaporation in the region of origin of the air masses bringing precipitation to the studied part of central Europe. Increased δ 18 O values are reflected also...
Article
Full-text available
We analyse water balance, hydrological response, runoff and snow cover characteristics in the Jalovecký Creek catchment (area 22 km 2 , mean elevation 1500 m a.s.l.), Slovakia, in hydrological years 1989-2018 to search for changes in hydrological cycle of a mountain catchment representing hydrology of the highest part of the Western Carpathians. Da...
Article
Full-text available
In many Austrian catchments in recent decades an increase in the mean annual air temperature and precipitation has been observed, but only a small change in the mean annual runoff. The main objective of this paper is (1) to analyze alterations in the performance of a conceptual hydrological model when applied in changing climate conditions and (2)...
Article
Full-text available
V práci bol použitý koncepčný z-o model TUW, ktorý podľa priestorového rozdelenia môžeme pre dané povodie zostaviť ako celistvý, resp. polo-rozčlenený, kde vstupné údaje sú priestorovo rozčlenené po výškových zónach. Použili sme obidve verzie modelu TUW (t.j., celistvá a polo-rozčlenená), pričom sme ich kalibrovali v dvoch 10-ročných obdobiach, med...
Conference Paper
Full-text available
Rainfall-runoff models are common tools for estimation of water balance components. In order to use these models in practical water resources studies, careful calibration is required. Uncertainty linked with the model calibration is a hot topic in various modeling studies. Several studies demonstrated that the use of different variants of objective...
Conference Paper
Full-text available
Reliable estimates of water balance components are important for solving various tasks in water management, such as hydropower management, flood forecasting, etc. It is well known that the modeling of the water balance components is associated with several problems, e.g., uncertainty in inputs, model parameters and model structure. Considering vari...
Conference Paper
Full-text available
The accurate estimation of snow is important, especially in alpine (mountainous) regions where the snow provides an important contribution to catchment runoff. In this study we assess the benefit of snow cover data in multi-variable calibration approach in terms of model performance. A lumped conceptual rainfall-runoff model (TUW model) is calibrat...
Conference Paper
Full-text available
Traditional one-regime rainfall-runoff (r-r) models are usually able to adequate simulate only flows in some interval (low or high flows). Proper simulation of both type of flows has a great importance in many practical applications, for example flood protection, risk analysis, etc. For this purpose more sophisticated modeling tools are needed. The...
Conference Paper
Full-text available
The main focus of the study is to evaluate the time stability of model parameters used to simulate snow accumulation and melt by a conceptual hydrologic model. Previous studies showed the implications of time stability of catchment model parameters for climate impact analyses. The main goal of this research is to assess the effects of different obj...
Conference Paper
Full-text available
The main objective of this study is to assess the spatial and temporal changes in sensitivity of model parameters in Austria. The sensitivity is assessed for a conceptual rainfall-runoff model (TUW model) by using Latin hypercube sampling method. The spatial variability in sensitivity of model parameters is evaluated over 213 Austrian basins. The t...
Poster
Full-text available
The main focus of the study is to evaluate the time stability of model parameters used to simulate snow accumulation and melt by a conceptual hydrologic model. Previous studies showed the implications of time stability of catchment model parameters for climate impact analyses. The main goal of this research is to assess the effects of different obj...
Poster
Full-text available
Parameter sensitivity analysis is a useful method in modelling studies to detect the most relevant model parameters for a catchments (Saltelli et al., 2006). A typical result of this method is a parameter list ranked according to their sensitivity for the period. In contrast to this approach, temporally resolved sensitivity analysis illustrates how...
Article
Full-text available
Príspevok je zameraný na hodnotenie kvality simulácie vybraného zrážkovo-odtokového modelu (TUW model) v meniacich sa klimatických podmienkach. Model TUW bol kalibrovaný v období 1981 – 1990 a validovaný v období 2001 – 2010 pre dve rozdielne skupiny 213 rakúskych povodí (povodia so snehovým a dažďovým režimom odtoku). Parametre boli optimalizované...
Article
Full-text available
The main objective of the paper is to understand how the model’s efficiency and the selected climatic indicators are related. The hydrological model applied in this study is a conceptual rainfall-runoff model (the TUW model), which was developed at the Vienna University of Technology. This model was calibrated over three different periods between 1...
Poster
Full-text available
The performance of hydrological models in different climatic periods is a frequent topic of scientific studies (Merz at al., 2011; Coron et al., 2012). There are many calibration procedures and strategies, but reaching clear conclusions on this topic is not easily achievable. In this study we investigate the performance of a conceptual rainfall-run...
Conference Paper
The performance of hydrological models in changing climate conditions is a frequent topic of recent scientific studies. There are many calibration procedures and strategies, but reaching clear conclusions on this topic is not easily achievable. In this paper we investigate the performance of a conceptual-rainfall runoff model (TUW model) under chan...
Conference Paper
Full-text available
The performance of hydrological models in changing climate conditions is a frequent topic of recent scientific studies. There are many calibration procedures and strategies, but reaching clear conclusions on this topic is not easily achievable. In this paper we investigate the performance of a conceptual-rainfall runoff model (TUW model) under chan...
Article
Full-text available
Till this day, there is not much known about the phylogeny of the Secale genus; therefore, in our research, we tried to shed some lights on the issue of rye (Secale genus) taxonomy. The genetic diversity and phylogenetic relationships were evaluated using 13,842 DArTseq™ polymorphic markers. The model-based clustering (STRUCTURE software) separated...
Conference Paper
Full-text available
Hydrological models, especially conceptual rainfall-runoff models, are widely used as tools for a wide range of tasks in water management, such as the management of water systems, flood protection, flood forecasting, climate change studies, etc. A common problem associated with the use of conceptual rainfall-runoff models in hydrology is their cali...
Article
Full-text available
The paper presents an analysis of changes in the structure of the average annual discharges, average annual air temperature , and average annual precipitation time series in Slovakia. Three time series with lengths of observation from 1961 to 2006 were analyzed. An introduction to spectral analysis with Fourier analysis (FA) is given. This method i...
Article
Full-text available
Nowadays, the concept of climate change has become widely known. A difficult as well as debated issue is the analysis of changes in the structure of hydrometeorological time series. One possible approach for solving this task is a detailed analysis of past periods. This approach should be based on high-quality meteorological and hydrological data a...
Conference Paper
Full-text available
The main objective of this paper is to present some features and results that make wavelet transform (WT) a suitable method for the hydrological modeling of time series. Time series analysis is a major tool in stochastic hydrology, which also aims to reveal changes in complicated structures of hydrologic processes. In this field several methods are...
Poster
Full-text available
The determination of the temporal variability of water resources is of high importance with respect to long-term water policy. Integrating information about the risks associated with climate change in the planning of adaptive measures is also a high priority for international organizations, financial institutions and environmental agencies. This im...
Article
Full-text available
V súčasnom období sa vo vodnom hospodárstve čoraz viac dostáva do popredia otázka zmeny vývojových trendov hydrologických a klimatických časových radov. Štúdium týchto zmien musí vychádzať z dôkladnej štatistickej analýzy historicky zaznamenaných časových radov. Spracovávanie takýchto údajov je založené na nových metódach štatistiky a matematickej...

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