Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 271 - 279, doi:
Scientific Paper, Slovak

Marián Melo, Pavla Pekárová, Cyntia Dujsíková, Katarína Melová: The Danube flood in year 1895. Part I.: In historical documents

 Full Text in PDF     45 DOWNLOADS

• The flood year 1895 over Slovakia, as well as the floods occurrence over the Upper, Central, and also over the Lower Danube in the last decade, have drawn our attention to those archive information concerning the Danube River basin floods. They do not occur over the river upper and central sections at the same time. While the upper Danube highest floods originate from the summer regional heavy rainfall events, over the central and lower Danube, their cause are mostly vast snowmelts (also sometimes in combination with the rainfall). In cities located on the upper Danube (e.g. Passau, Linz, Melk, Krems, or Hainburg), can be found more flood marks of the historical floods, even since the year 1501. Such marks on Danube downstream from Bratislava are not so frequent. This study is divided into two parts. In its first one, we tried to sum up information on the 1895 Danube flood based upon the historical records studies. In its second part, that flood is evaluated on base of the preserved observed Danube water level data from Bratislava (SVK), Nagymaros (HU), Veliko Gradiste (SR) and Orsova (RO), yielding from the international project “Flood regime of rivers in the Danube River basin”
  
  KEY WORDS: flood, flood marks, historical flood documents
  
  Address:
  - Marián Melo, Univerzita Komenského v Bratislave Fakulta matematiky, fyziky a informatiky UK Mlynská dolina 842 48 Bratislava, Slovenská republika (Corresponding author. Tel.: Fax.: Email: melo@fmph.uniba.sk)
  - Pavla Pekárová, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika
  - Cyntia Dujsíková, Univerzita Komenského v Bratislave Prírodovedecká fakulta Mlynská dolina 842 15 Bratislava, Slovenská republika
  - Katarína Melová, Slovenský hydrometeorologický ústav Jeséniova 17 833 15 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 280 - 288, doi:
Scientific Paper, Slovak

Pavla Pekárová, Pavol Miklánek, Ján Pekár, Marián Melo: The Danube flood in year 1895. Part II.: In instrumental discharge data

 Full Text in PDF     37 DOWNLOADS

• In this second part, the 1895 Danube flood is evaluated according to the preserved and archived discharge data from the gauging stations Bratislava, Nagymaros (HU), Veliko Gradiste (SR) and Orsova (RO). All of them from the project “Flood regime of rivers in the Danube River basin“ database.
  
  KEY WORDS: flood, Danube River, flood regime analysis
  
  Address:
  - Pavla Pekárová, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika (Corresponding author. Tel.: Fax.: Email: pekarova@uh.savba.sk)
  - Pavol Miklánek, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika
  - Ján Pekár, Katedra aplikovanej matematiky a štatistiky Fakulta matematiky, fyziky a informatiky UK Mlynská dolina 842 48 Bratislava, Slovenská republika
  - Marián Melo, Univerzita Komenského v Bratislave Fakulta matematiky, fyziky a informatiky UK Mlynská dolina 842 48 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 289 - 296, doi:
Scientific Paper, Slovak

Ján Szolgay, Silvia Kohnová, Tomáš Bacigál, Kamila Hlavčová: Proposed flood: Joint probability analysis of maximum discharges and their pertaining volumes

 Full Text in PDF     35 DOWNLOADS

• Joint analysis of random variables characterising a flood event (maximum discharge and volume) uses their mutual relationship (through copulas) for better estimation of design quantities. The paper points out how to utilize such models of dependence with the help of a probability theory, and by a case study in the profile Vltava-Kamýk it shows an estimation of the flood wave volume corresponding to design discharge for the return period N = 10 000 years. The paper follows the results of Bacigál et. al. (2012), where the same data of maximum discharges and volumes were fitted by distribution functions and based on GOF tests several copulas were chosen to be appropriate for description of the dependence structure.
  
  KEY WORDS: joint probability analysis, maximum discharges and volumes, flood wave
  
  Address:
  - Ján Szolgay, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika (Corresponding author. Tel.: Fax.: Email: jan.szolgay@stuba.sk)
  - Silvia Kohnová, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika
  - Tomáš Bacigál, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika
  - Kamila Hlavčová, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 297 - 305, doi:
Scientific Paper, Slovak

Tomáš Bacigál, Silvia Kohnová, Ján Szolgay, Kamila Hlavčová: Design flood: Type selection and parameter estimation of join distribution function probability of discharge and volume by copula

 Full Text in PDF     32 DOWNLOADS

• In the contribution we built up joint distribution function called copula as a model of dependence between two flood wave characteristics: maximum discharge and volume. The input data is comprised by summer discharge maxima series during 1877-2002 in the Vltava-Kamýk dam profile together with the corresponding volumes. Marginal distribution of individual quantities was modeled by univariate distribution function of several distribution classes, namely of Generalized Extreme-Value (GEV), Log-Normal (LN2 with two, and LN3 with three parameters), Pearson with logarithmic transformation (LP3) and Johnson distribution. Effect of marginal distributions and volume construction was examined.
  
  KEY WORDS: maximum discharges and volumes of design flood waves, join distribution function, copula
  
  Address:
  - Tomáš Bacigál, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika
  - Silvia Kohnová, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika
  - Ján Szolgay, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika
  - Kamila Hlavčová, Slovenská technická univerzita v Bratislave Stavebná fakulta Radlinského 11 813 68 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 309 - 313, doi:
Scientific Paper, Slovak

Roman Výleta, Ján Szolgay: Assessment of seasonal impact of parameters of a simple Markov model of first order on the quality of simulation of daily precipitation amounts

 Full Text in PDF     26 DOWNLOADS

• For stochastic continuous simulation of meteorological variables, such as precipitation amount and for the evaluation of their probabilistic properties, the stochastic weather generators are used as well. Within the project APVV-0496-10 we are dealing with the development of stochastic generator of precipitations in a daily time step. The work is focused especially on the impact of seasonality of parameters of a Markov model of first order on the quality of simulated daily precipitation amounts in rainfall station Hurbanovo (1.1.1961 – 31.12.2005) in Slovakia
  
  KEY WORDS: precipitation amount, weather generator, continual simulation, first order Markov chains
  
  Address:
  - Roman Výleta, Katedra vodného hospodárstva krajiny Stavebná fakulta STU Radlinského 11 813 68 Bratislava, Slovenská republika (Corresponding author. Tel.: +4212 59274 498 Fax.: +4212 52923 575 Email: roman.vyleta@stuba.sk)
  - Ján Szolgay, Katedra vodného hospodárstva krajiny Stavebná fakulta STU Radlinského 11 813 68 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 314 - 323, doi:
Scientific Paper, Slovak

Mária Pásztorová, Jana Skalová: Prognosis of precipitation and temperatures for the area of Poiplie

 Full Text in PDF     27 DOWNLOADS

• Climate change is one of the largest threats of the modern world that ordinary people experience primarily through changes and extreme events of weather. These include air temperature changes, uneven distribution of precipitation, an increase in rotation of torrential short-term precipitation and longer non-precipitation periods. But climate change is not only a change in weather; it has a much larger impact on the ecosystem. Through submitted work, we decided to analyze the impact of climate change on wetland ecosystems Poiplie, which is situated on South of Slovakia in the Ipeľ river basin. The area is important wetland biotope with high presence of rare plant and animal species living mainly in open water areas, marshes, wet meadows and alluvial forests. For evaluation of climate change we used the Canadian global CGCM 3.1 model with two regional emission scenarios, the A2 emission scenario (pessimistic) and the B1 emission scenario (optimistic), and also two regional models, the Dutch KNMI (with A1B emission scenario) and German MPI (with A1B emission scenario), while both these regional models take over boundary conditions for the solution of equations from the outputs of ECHAM5 global model. Whereas for the reference period was chosen the period of years 1977-2010, the evaluated time period we divided in the 30-years long time horizons 2011-2040, 2041-2070 and 2071-2100. The impact of climate change was analyzed by course of two meteorological elements, namely precipitation totals and air temperature, because these parameters reflect the best climate change.
  
  KEY WORDS: climate change, wetland, air temperature, precipitation
  
  Address:
  - Mária Pásztorová, Katedra vodného hospodárstva krajiny Stavebná fakulta STU Radlinského 11 813 68 Bratislava, Slovenská republika (Corresponding author. Tel.:+421 2 59274616 Fax.: Email: maria.pasztorova@stuba.sk)
  - Jana Skalová, Katedra vodného hospodárstva krajiny Stavebná fakulta STU Radlinského 11 813 68 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 324 - 333, doi:
Scientific Paper, Slovak

Tatiana Kaletová, Karol Šinka: Simulation of water runoff from extreme rainfall by GIS and SCS-CN method

 Full Text in PDF     28 DOWNLOADS

• Extreme rainfall and runoff from the landscape can be quite accurately measured. However, the topography of Slovakia as well as the specific conditions of the valleys does not make measurements on all streams possible. Created methods and models allow simulating possible situations that could occur in the country based on the specified parameters. The more model is complex, the most input data are necessary. The selected SCS-CN method is used worldwide and adapted to the conditions of Slovakia. GIS environment provides an opportunity to simulate changes in land use, and then to calculate the total runoff volume and peak flow in the river bed of the stream.
  
  KEY WORDS: flood, runoff, Jelensky creek, Drevenica, SCS-CN method
  
  Address:
  - Tatiana Kaletová, Fakulta záhradníctva a krajinného inžinierstva SPU v Nitre Hospodárska 7 949 76 Nitra, Slovenská republika (Corresponding author. Tel.:+421 (37) 641 5234 Fax.: Email: tatiana.kaletova@uniag.sk)
  - Karol Šinka, Fakulta záhradníctva a krajinného inžinierstva SPU v Nitre Hospodárska 7 949 76 Nitra, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 334 - 341, doi:
Scientific Paper, Slovak

Branislav Pramuk, Peter Malík: Mutual comparison of temporal changes in yield and water temperature of selected springs in the northern part of Spišskošarišský region

 Full Text in PDF     28 DOWNLOADS

• Paper deals with analyzing of basic statistical parameters of groundwater springs, as – spring yield, groundwater temperature and air temperature. The parameters are initially evaluated using statistical characteristics, such as maximum, minimum, median, modus, arithmetic mean, variance, standard deviation, coefficient of variation, coefficient of asymmetry and coefficient of kurtosis. Mutual comparison of temporal changes of parameters was performed using cross-correlation of time series in one week time step. The parameters were also plotted in the form of time series in seasonal graphs in order to subtract the trends of input components. Emphasis was given to find the reasons of their relative interdependence in time, assuming that the observed differences are reflecting different mechanisms of groundwater circulation in the rock environment. The main indicator for assessing the time lag of yield and the water temperature was the value of correlation coefficient in the cross–correlation method. The time step of one week in the cross-correlation resulted from the fact that the observations performed by Slovak Hydrometeorological Institute, by which the input data were provided, were mostly based on weekly measurements in the basic monitoring network.
  
  KEY WORDS: spring yield, spring water temperature, cross-correlation, temporal changes
  
  Address:
  - Branislav Pramuk, Ústav Hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika (Corresponding author. Tel.: +421(2) 44268 242 Fax.: Email: pramuk@uh.savba.sk)
  - Peter Malík, Fakulta informatiky a informačných technológií, Slovenská technická univerzita v Bratislave, Ilkovičova 2, 842 16 Bratislava 4, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 342 - 349, doi:
Scientific Paper, Slovak

Ladislav Holko, Michal Danko, Zdeněk Kostka: Classification of winters, density of new snow and the degree-day factor in the Jalovecký creek catchment

 Full Text in PDF     32 DOWNLOADS

• The article is devoted to climatic classification of winters 1980-2011 and evaluation of measured data on two important snow characteristics. Density of new snow was calculated from data measured at the meteorological station Liptovský Mikuláš (altitude 570 m a.s.l.), the Liptovská kotlina valley, in period 1989-2011. Density of the new snow was most frequently between 40 and 100 kg.m-3 and only rarely exceeded 200 kg.m-3. Median of the new snow density was 74 kg.m-3. Mean daily air temperature during most snowfalls in Liptovský Mikuláš varied between -4 and 0°C. The degree-day factor that is an important parameter of the snow models, was calculated on the basis of data from station Červenec (the Western Tatra Mountains, altitude 1500 m a.s.l.) measured in period 1989-2011. Its values varied between 0.5 and 9.8 mm.°C-1 (median 3.58 mm.°C-1). The values of the degree-day factor obtained from measured data were compared with the values given by calibration of the simple degree-day model and calculated from the equation by Martinec. Unlike assumed by the equation published by Martinec, the relationship between snow density and degree-day factor is nonlinear. We described it by an exponential equation. The relationship was confirmed by additional (validation) data that was not used in determination of the exponential equation.
  
  KEY WORDS: density of new snow, degree-day factor, relationship between snow density and the degree-day factor
  
  Address:
  - Ladislav Holko, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovecká 16 03105 Liptovský Mikuláš, Slovenská republika
  - Michal Danko, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovecká 16 03105 Liptovský Mikuláš, Slovenská republika
  - Zdeněk Kostka, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovecká 16 03105 Liptovský Mikuláš, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 350 - 357, doi:
Scientific Paper, Slovak

Michal Dóša, Ladislav Holko, Mária Martincová, Michal Danko, Zdeněk Kostka, Milan Gomboš: Determination of soil hydraulic conductivity in the mountain catchment by soil texture and field measurements

 Full Text in PDF     30 DOWNLOADS

• Hydraulic conductivity of soil surface was measured at 38 sites in the Jalovecký creek catchment by the minidisc infiltrometer. Mean hydraulic conductivity of soils in the mountain part of the catchment (130 mm.h-1) is significantly higher than the one in the foothill part of the catchment (33 mm.h-1), but it has bigger spatial variability as well (although the coefficients of variations are similar). Measured values were compared with the values calculated from the formulas based on soil texture. Calculated values are in many cases similar (within an order of magnitude) to the measured ones. However, the maximum differences between the measeured and calculated values are similar to the differences in the hydraulic conductivity among different sites in the catchment. Field measurements of soil hydraulic conductivity in our mountains are not so common. The measured values show that high hydraulic conductivity of soils in the mountain part of the catchment (the Western Tatra Mountains) exceeds 100 mm.hod-1 at one half of the sites. At a few sites the water during the measurement did not infiltrate. However, the infiltration started after a slight wetting of the soil surface and the measured hydraulic conductivity significantly increased.
  
  KEY WORDS: hydraulic conductivity of soil, small mountain catchment, the Western Tatra Mountains, variability
  
  Address:
  - Michal Dóša, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovská 16 03105 Liptovský Mikuláš, Slovenská republika (Corresponding author. Tel.:+421 44 5522522 Fax.: Email: dosa@uh.savba.sk)
  - Ladislav Holko, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovská 16 03105 Liptovský Mikuláš, Slovenská republika
  - Mária Martincová, - Michal Danko, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovská 16 03105 Liptovský Mikuláš, Slovenská republika
  - Zdeněk Kostka, Ústav hydrológie SAV Experimentálna hydrologická základňa Ondrašovská 16 03105 Liptovský Mikuláš, Slovenská republika
  - Milan Gomboš, Ústav hydrológie SAV Výskumná hydrologická základňa Hollého 42 071 01 Michalovce (Corresponding author. Tel.: Fax.: Email: gombos@uh.savba.sk)

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 358 - 365, doi:
Scientific Paper, Slovak

Július Šútor, Peter Šurda, Vlasta Štekauerová: Analysis of the time periods without precipitation duration in the context of the climatic change

 Full Text in PDF     30 DOWNLOADS

• The water storage in the aeration zone of the soil during the vegetative period in the lowland territories is affected by meteorological phenomenon, vegetative cover and by the position of the groundwater level. Integral impact of the previously mentioned elements determines the course of the soil water storage. The proven effect of the climatic change is the increase of mean monthly or annual air temperature. During the last 15 years the soil drought occurred on the localities in the particular regions of Slovakia. This drought periods were not only connected with the increasing of the air temperature or with significant changes of the precipitation totals, but also with the occurrence of the prolonged time interval between the individual rainfall events. The impact of the time periods without precipitation (TPP) is related with decreasing of the available soil water storage. If the interval between the rainfall events reaches the time in which the soil water storage decreases as the impact of the evapotranspiration to the value of the wilting point, the soil drought starts. The submitted article deals with the categorization of the TPP based on the valuation of the model extreme situation at the locality of Rye Island and evaluation of the defined TPP occurrence during 40-years long time period. In this study were analysed the daily precipitation totals from meteorological station Ziharec and data describing the course of the soil water storage, obtained through the use of direct monitoring of 2 localities from Rhye Island territory. This data are completed with the values of actual evapotranspiration, obtained through the mathematical model of the soil water regime HYDRUS 1D.
  
  KEY WORDS: time period without precipitation, soil moisture regime, soil drought
  
  Address:
  - Július Šútor, Ústav hydrológie SAV Račianska 75, 831 02 Bratislava, Slovenská republika (Corresponding author. Tel.:+4212 49268293 Fax.: Email: sutor@uh.savba.sk)
  - Peter Šurda, Ústav hydrológie SAV Račianska 75, 831 02 Bratislava, Slovenská republika
  - Vlasta Štekauerová, Ústav hydrológie SAV Račianska 75, 831 02 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 366 - 376, doi:
Scientific Paper, Slovak

Hana Hlaváčiková, Viliam Novák, Marek Rodný: Three reference crop potential evapotranspiration calculation methods

 Full Text in PDF     28 DOWNLOADS

• Paper deals with comparison of three potential evapotranspiration computational methods of a reference crop (grass vegetation cover). Such methods are two modified Penman-Monteith equations and empirical Hargreaves equation which are part of the vadose zone water dynamics deterministics models, particularly of the models Hydrus and Global. Calculations have been done for seasonal period of the years 2000 – 2009, using the station Gabčíkovo meteorological data and characteristics. The results indicate significant results differences, which should be taken into account in the soil water storage modelling, using the verified potential evapotranspiration calculation methods.
  
  KEY WORDS: potential evapotranspiration, reference crop, model Hydrus-1D, model Global
  
  Address:
  - Hana Hlaváčiková, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika (Corresponding author. Tel.: Fax.: Email: hlavacikova@uh.savba.sk)
  - Viliam Novák, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika
  - Marek Rodný, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 377 - 385, doi:
Scientific Paper, Slovak

Dana Kotorová: The comparison of effect of different cultivation practices on water storages in profile of gleyic fluvisol

 Full Text in PDF     26 DOWNLOADS

• The aim of this contribution was to compare development of water storage during vegetation season in profile of clay-loamy Gleyic Fluvisol of the East Slovak Lowland at its different cultivation. Conventional tillage and no-tillage practises were examined. Soil samples for the determination of water storage were taken from profile 0.0 – 0.3 m, respectively 0.0 – 0.8 m from both tillage variants. Obtained water content values were recounted at maximum water content on percentage of field water capacity (θPK), at average water content on percentage of threshold point (θZD), at minimum water content on percentage of wilting point (θV). From point of view of sum of precipitation, vegetation seasons of years 2009, 2011 and 2012 were normal and rainfall reached 75 – 112 % of longtime normal. Vegetation season of year 2010 was extremely wet and rainfall reached till 205.5 % of long-time normal. Soil tillage statistically significant influenced maximum and average water storage in profile 0.0 – 0.8 m. Effect of soil tillage on minimum water storage was statistically significant already in depth 0.0 – 0.3 m. In year 2012 minimum water storage reached only 83.88 – 94.28 % of moisture of threshold point. Minimum water storage was higher for no-till system in comparison with conventional tillage. These values were higher about 6.11 % from wilting point moisture for depth 0.0 – 0.3 m and about 2.02 % from wilting point moisture for soil depth 0.0 – 0.8 m.
  
  KEY WORDS: time series, trend analyse, loamy soil, physical soil properties, development prediction of soil properties
  
  Address:
  - Dana Kotorová, CVRV - Výskumný ústav agroekológie Špitálska 1273 071 01 Michalovce, Slovenská republika (Corresponding author. Tel.: Fax.: Email: kotorova@minet.sk)

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 386 - 393, doi:
Scientific Paper, Slovak

Radoslav Schügerl, Yvetta Velísková: Different velocity of ultrasound waves of the rocks by change of saturation

 Full Text in PDF     26 DOWNLOADS

• Velocity of ultrasound waves through the porous media is related to physical-mechanical properties of these media. This is the elementary idea of methods for determination of the media properties, based on changes of velocity of the ultrasound (longitudinal) waves (vp). Water content (saturation of rocks) in porous media significantly affects these characteristics. Article relation impact of change of saturation on the velocity of ultrasound waves through the porous medium – rocks. Measurements were performed on the 19 sandstone samples from Hubová – Ivachnová locality and 15 sandstone samples from Jánovce – Jablonov locality. Samples was saturated in the laboratory conditions during 24 hours. Measurements were done in irregular intervals.
  
  KEY WORDS: porous medium, saturation, ultrasound waves
  
  Address:
  - Radoslav Schügerl, Ústav hydrológie Slovenská akadémia vied Račianska 75 831 02 Bratislava, Slovenská republika (Corresponding author. Tel.:+421 2 49 268 280 Fax.: +421 2 44 259 404 Email: schugerl@uh.savba.sk)
  - Yvetta Velísková, Ústav hydrológie Slovenská akadémia vied Račianska 75 831 02 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 394 - 403, doi:
Scientific Paper, Slovak

Marcela Gergeľová, Žofia Kuzevičová, Štefan Kuzevič, Martina Zeleňáková: GIS as a supporting tool in the process of hydrodynamic modeling on a selected part of a watercourse

 Full Text in PDF     29 DOWNLOADS

• Repeated flood events always point to necessity of comprehensive solutions of flood problems in the Slovak Republic. This fact requires the necessity of a comprehensive proposal to build a complete flood protection measures in potential flood areas. The article will be devoted to the issue of hydrodynamic modeling with regard to specific conditions of the Slovak Republic to the selected part of the river basin. The advantage provided by the hydrodynamic models is the possibility to estimate the economic and social impacts on the environment. Integrating GIS for flood issues is an opportunity of incident simulation (floods), the draft of measures to prevent negative impacts and evaluate the effects of flooding. Hydrodynamic model HEC-RAS combined with extensions HEC - GeoRAS will be representative for the modeling of potential inundation polygons for selected parts of the river Torysa. The aim of this paper is the creation of maps showing the output of the potential threat of an application using ArcGIS 9.x software environment.
  
  KEY WORDS: geographical information systems, hydrodynamic model, HEC-RAS, drainage basin Torysa
  
  Address:
  - Marcela Gergeľová, Technická univerzita v Košiciach Fakulta baníctva, ekológie, riadenia a geotechnológií Ústav geodézie, kartografie a GIS Park Komenského 19 042 00 Košice, Slovenská republika (Corresponding author. Tel.:00421556022916 Fax.: Email: marcela.gergelova@tuke.sk)
  - Žofia Kuzevičová, Technická univerzita v Košiciach Fakulta baníctva, ekológie, riadenia a geotechnológií Ústav geodézie, kartografie a GIS Park Komenského 19 042 00 Košice, Slovenská republika
  - Štefan Kuzevič, Technická univerzita v Košiciach Fakulta baníctva, ekológie, riadenia a geotechnológií Ústav podnikania a manažmentu Park Komenského 19 042 00 Košice, Slovenská republika
  - Martina Zeleňáková, Technická univerzita v Košiciach Stavebná fakulta Ústav environmentálneho inžinierstva Vysokoškolská 4 042 00 Košice, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 404 - 415, doi:
Scientific Paper, Slovak

Jana Pařílková, Marie Fejfarová, Michael Novák: Monitoring of the pond dike using EIS method

 Full Text in PDF     24 DOWNLOADS

• To identify the observed changes, which are related to variable loads earth dike with water, in time and space has been selected indirect electrical method of measuring electrical impedance spectrometry. On a form of maps of electrical conductance are identified the anomalies in monitored area (in space and time). During the long-time monitoring it is possible to evaluate the trends of their development. The paper presents examples of result achieved in monitoring of pond dike in the municipality of Jevíčko.
  
  KEY WORDS: electrical impedance spectrometry, electrical conductance, soil, dike, fish pond, monitoring
  
  Address:
  - Jana Pařílková, Vysoké učení technické v Brně, Fakulta stavební, Ústav vodních staveb, Laboratoř vodohospodářského výzkumu, Veveří 95, 602 00 Brno, Česká republika (Corresponding author. Tel.:+420 54114 7284 Fax.: +420 54114 7288 Email: parilkova.j@fce.vutbr.cz)
  - Marie Fejfarová, Vysoké učení technické v Brně, Fakulta stavební, Ústav vodních staveb, Laboratoř vodohospodářského výzkumu, Veveří 95, 602 00 Brno, Česká republika
  - Michael Novák, Vysoké učení technické v Brně, Fakulta stavební, Ústav vodních staveb, Laboratoř vodohospodářského výzkumu, Veveří 95, 602 00 Brno, Česká republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 416 - 422, doi:
Scientific Paper, Slovak

Márta Bara, Yvetta Velísková, Renáta Dulovičová, Darina Takáčová: Evaluation of point-source pollution hazard in the upper Hron river basin

 Full Text in PDF     26 DOWNLOADS

• In this paper the point-source pollution hazard in the Upper Hron River basin was evaluated. The Hron River is 279.5 km long and is the second longest river in Slovakia. In the study the upper part of the river up to cca 150 river kilometers was examined, i.e. 130 km. The main polluters in this area were pointed out and the type and quantity of pollution was examined. The pollution amounts were compiled and statistically evaluated for the period 2004 – 2010. In the study area about 20 point sources of pollution were identified. The results of this study could be used as basis information for further research on water quality in this area, e.g. as input data to numerical models of the surface water quality or hydrodynamic models simulating a pollution transport in open channels and the processes of qualitative changes in water quality in the basin. The outcomes of the analysis also could be taken as background data for the scenarios of water quality in the Upper Hron River basin.
  
  KEY WORDS: point-source pollution, water quality, water pollution hazard
  
  Address:
  - Márta Bara, Ústav hydrológie Slovenská akadémia vied Račianska 75 831 02 Bratislava, Slovenská republika (Corresponding author. Tel.:+421 2 49 268 280 Fax.: +421 2 44 259 404 Email: bara@uh.savba.sk)
  - Yvetta Velísková, Ústav hydrológie Slovenská akadémia vied Račianska 75 831 02 Bratislava, Slovenská republika
  - Renáta Dulovičová, Ústav hydrológie Slovenská akadémia vied Račianska 75 831 02 Bratislava, Slovenská republika
  - Darina Takáčová, Slovenský hydrometeorologický ústav Jeséniova 17 833 15 Bratislava, Slovenská republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 423 - 429, doi:
Scientific Paper, Slovak

, Renáta Dulovičová, Márta Bara, Zdeněk Chára: Testing of ADV probe at measuring change of velocity profile behind the obstacle

 Full Text in PDF     28 DOWNLOADS

• In this contribution the results of velocity profile measurements in a rectangular flume using the ADV (Acoustic Doppler Velocimetry) method are presented. The measurements were taken in a laboratory flume on the Institute of Hydrodynamics ASCR in Prague. The 3D ADV probe of Flow Tracker (SonTek/YSI) device was used. An obstacle (Fig.3) was installed into the laboratory flume, what modified the flow course both in horizontal and vertical direction. First, the undisturbed velocity profile was measured and afterwards profiles behind the obstacle in three different distances were measured. The Flow Tracker device was tested in „General mode operation“, in which all the three velocity vectors of the measured point are recorded. This contribution is dealing with the changes of the velocity vectors and their vector sum.
  
  KEY WORDS: velocity profile, Acoustic Doppler Velocimetry, rectangular flume, open channel flow
  
  Address:
  - Yvetta Velísková, - Renáta Dulovičová, Ústav hydrológie SAV Račianska 75 831 02 Bratislava Slovenská republika, Slovenská republika
  - Márta Bara, Ústav hydrológie SAV Račianska 75 831 02 Bratislava Slovenská republika, Slovenská republika
  - Zdeněk Chára, Ústav pro hydrodynamiku AVČR,v.v.i. Pod Paťankou 5 166 12 Praha 6 Česká republika

Acta Hydrologica Slovaca, Vol. 13, No. 2, 2012, p. 430 - 435, doi:
Scientific Paper, Slovak

Marek Sokáč, Yvetta Velísková, Pavel Berta: Paper to methodology of longitudinal dispersion coefficients determination on the basis of field measured results in the river

 Full Text in PDF     26 DOWNLOADS

• The paper deals with methodology of longitudinal dispersion coefficients determination, which was used during evaluation of field experiments within framework of the project APVV-0274-10 “Quantification of input data influence on correctness of outputs of dispersion simulation models for surface water”. How is evident from the project name, this project aims on improvement of the inputs to the pollution spreading mathematical models. The most important parameters in these models are longitudinal and transverse dispersion coefficients. The measurements, sampling and subsequent modelling were performed at straight part of the Malá Nitra River situated in the village Veľký Kýr. The field measurements were made at 300 m long straight part of the prismatic river bed with 5,5 m width in water level, average depth was 0,52 m and discharge was approximately 0,5 m3.s-1. The paper describes the methodology of the measurements and preliminary results, analysis and discussion of results and further process of the project.
  
  KEY WORDS: dispersion coefficient, longitudinal dispersion, river
  
  Address:
  - Marek Sokáč, Katedra zdravotného a environmentálneho inžinierstva Stavebná fakulta STU Radlinského 11 813 68 Bratislava, Slovenská republika (Corresponding author. Tel.: Fax.: Email: marek.sokac@stuba.sk)
  - Yvetta Velísková, Ústav hydrológie SAV Račianska 75 831 02 Bratislava, Slovenská republika
  - Pavel Berta, Katedra zdravotného a environmentálneho inžinierstva Stavebná fakulta STU Radlinského 11 813 68 Bratislava, Slovenská republika