Recent Submissions

  • Numerical and experimental investigation of swirling flow in a conical diffuser 

    Štefan, David; Zubík, Pavel; Hudec, Martin; Rudolf, Pavel (EPJ Web of Conferences, 2015-05-06)
    The decelerated swirling flow often breaks down into helical structure which is unstable and causes unsteady velocity and pressure fields. The numerical and experimental investigation of this flow pattern is carried out ...
  • A Review of Measurement Calibration and Interpretation for Seepage Monitoring by Optical Fiber Distributed Temperature Sensors 

    Ghafoori, Yaser; Vidmar, Andrej; Říha, Jaromír; Kryžanowski, Andrej (MDPI, 2020-10-06)
    Seepage flow through embankment dams and their sub-base is a crucial safety concern that can initiate internal erosion of the structure. The thermometric method of seepage monitoring employs the study of heat transfer ...
  • Bacterial Diversity in the Asphalt Concrete Lining of the Upper Water Reservoir of a Pumped-Storage Scheme 

    Špano, Miroslav; Říha, Jaromír; Španová, Alena; Šedo, Ondrej; Rittich, Bohuslav (MDPI, 2020-10-30)
    Asphalt concrete linings (ACLs) are frequently used in pumped-storage hydropower schemes with frequently oscillating reservoir water levels. ACLs can be damaged during operation, which shortens their service life. One type ...
  • Dam Break Modeling in a Cascade of Small EarthenDams: Case Study of the Cizina River in the Czech Republic 

    Říha, Jaromír; Kotaška, Stanislav; Petrula, Lubomír (MDPI, 2020-08-17)
    Failures of small dams can pose a serious threat to people and property even if the size of the schemes is relatively low. In many cases, small dams are situated in a cascade along streams, meaning that the failure of the ...
  • Flow characteristics at trapezoidal broad-crested side weir 

    Říha, Jaromír; Zachoval, Zbyněk (Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic, 2015-04-01)
    Broad-crested side weirs have been the subject of numerous hydraulic studies; however, the flow field at the weir crest and in front of the weir in the approach channel still has not been fully described. Also, the discharge ...
  • Assessment of empirical formulae for determining the hydraulic conductivity of glass beads 

    Říha, Jaromír; Petrula, Lubomír; Hala, Mario; Alhasan, Zakaraya (De Gruyter Open, 2018-08-14)
    Empirical formulae are often used in practice to quickly and cheaply determine the hydraulic conductivity of soil. Numerous relations based on dimensional analysis and experimental measurements have been published for the ...
  • Evaluation of groundwater contamination in former military airport area 

    Petrula, Lubomír; Říha, Jaromír; Julínek, Tomáš (Croatian Association of Civil Engineers, 2018-05-10)
    The analysis of groundwater contamination at the former military airport, due to fuel tanks leakage and other accidental spills, mainly involving polycyclic aromatic hydrocarbons (PAH), is presented in the paper. It was ...
  • Discussion on the Safety Factors of Slopes Recommended for Small Dams 

    Vrubel, Jan; Říha, Jaromír (Mendel University Press, 2017-03-06)
    The design and assessment of the slope stability of small embankment dams is usually not carried out using slope stability calculations but rather by the comparison of proposed or existing dam slopes with those recommended ...
  • Mapping of uplift hazard due to rising groundwater level during floods 

    Julínek, Tomáš; Duchan, David; Říha, Jaromír (Wiley, 2020-02-24)
    European Directive 2007/60/EC only briefly mentions the problem of hazard arising due to groundwater flooding, and techniques for the mapping of hazard occuring due to rising groundwater have not yet been scientifically ...
  • Discharge coefficient of a rectangular sharp-edged broad-crested weir 

    Zachoval, Zbyněk; Knéblová, Michaela; Roušar, Ladislav; Rumann, Ján; Šulc, Jan (Institute of Hydrology of the Slovak Academy of Sciences, Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic, 2014-04-01)
    This paper is concerned with the determination of the relationship for the calculation of the discharge coefficient at free overflow over a rectangular sharp-edged broad-crested weir without lateral contraction. The ...
  • Experimental measurement and numerical modeling of cavitating flow in converging-diverging nozzle 

    Rudolf, Pavel; Hudec, Martin; Zubík, Pavel; Štefan, David (EDP Sciences, 2012-04-16)
    Paper presents results of the experimental research and computational modeling aimed on cavitating vortical structures induced by swirling flow. An experimental circuit was built with swirl generator and converging-diverging ...
  • Analysis of Seepage in a Laboratory Scaled Model using Passive Optical Fiber Distributed Temperature Sensor 

    Ghafoori, Yaser; Maček, Matej; Vidmar, Andrej; Říha, Jaromír; Kryžanowski, Andrej (MDPI, 2020-01-29)
    Abstract: Seepage is the key factor in the safety of dikes and earthfill dams. It is crucial to identify and localize the seepage excesses at the early stages before it initiates the internal erosion process in the structure. ...
  • Earth-Fill Dam Monitored by EIS Method during Application of Nutrient Aqueous Solution used in BioSealing Method 

    Pařílková, Jana; Gjunsburgs, Boriss; Zachoval, Zbyněk; Veselý, Jaroslav; Műnsterová, Zuzana (IOP Publishing, 2017-10-25)
    The paper gives short information about the results of monitoring the electrical properties of an earth-fill dam during the application of a nutrient aqueous solution used in the method BioSealing. Monitoring is carried ...
  • Shape of the nappe during free overfall from a rectangular channel with zero bed slope 

    Zachoval, Zbyněk; Böhm, Petr; Pařílková, Jana; Šafář, Robert; Šulc, Jan (Institute of Hydrology of the Slovak Academy of Sciences, Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic, 2013-09-02)
    The paper deals with selected procedures used to calculate the shape of compact nappe during free overfall from a smooth horizontal channel with rectangular cross section. Calculated and measured water surface and velocity ...
  • Zone of flow separation at the upstream edge of a rectangular broad-crested weir 

    Zachoval, Zbyněk; Mistrová, Ivana; Roušar, Ladislav; Šulc, Jan; Zubík, Pavel (Institute of Hydrology of the Slovak Academy of Sciences, Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic, 2012-12-01)
    The paper deals with the determination of the basic characteristics of flow at the crest of a rectangular broad-crested weir and in detail with the characteristics of flow separation at the upstream edge of the weir crest. ...
  • Numerical and experimental investigation of swirling flow in a conical diffuser 

    Štefan, David; Zubík, Pavel; Hudec, Martin; Rudolf, Pavel (EDP Sciences, 2014-11-18)
    The decelerated swirling flow often breaks down into helical structure which is unstable and causes unsteady velocity and pressure fields. The numerical and experimental investigation of this flow pattern is carried out ...