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The development of a method for evaluation of the green roofs' retention capacity
Herůfek, Marek ; Hejduk,, Stanislav (referee) ; Žák, Antonín (advisor)
This diploma thesis deals with the development of methods for evaluating retention features of green roofs. For the purpose of this thesis, a rainfall simulator was designed and various types of precipitation were examined. The thesis is divided into two main parts: a theoretical part and a practical part. In the theoretical part, the importance of water retention on green roofs is discussed. In addition, a physical theory related to this topic is included and various rainfall simulators used for scientific experiments in the Czech Republic and abroad are described. The practical part deals with the measurement of droplet size and rainfall simulator design. In this part, the process of measuring the flow and the intensity of rainfall by using scales, flow meter and rain gauge is described. For this purpose, a datalogger was developed by the Faculty of Eletrical Engineering in Brno. Finally, the results are sumarized and recommendations on how to conduct the research in the future are provided.
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Kinetic energy of rainfall
Pála, Jan ; Petrů, Jan (advisor) ; Gregar, Jan (referee)
Water erosion is caused by the momentum of falling raindrops and is transferred into the soil surface causing soil loss throughout the world. Rainfall kinetic energy is an important component of determining erosivity of rain with subsequent determination of the average soil loss on land and is derived from the precipitation characteristics of rain. Organised overview of the precipitation characteristics and deriving of the kinetic energy from these characteristics along with deriving methods of the kinetic energy via the rainfall intensity is done in the first part of this work in the form of literature research.
The second part of this work is focused on the comparison of the selected existing relationships for deriving kinetic energy from rainfall intensity. Kinetic energy can be expressed by form of volume specific - KEmm or time specific form - KEtime, where the model values of rainfall intensity were put into the selected formulas. Chosen KE-I relationships were compared on the basis of climate categorisation and altitude of the locations where the equations originated. Discussion and conclusion of this work assesses suitability or inapplicability of the selected equations for climate of the Czech republic.
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The development of a method for evaluation of the green roofs' retention capacity
Herůfek, Marek ; Hejduk,, Stanislav (referee) ; Žák, Antonín (advisor)
This diploma thesis deals with the development of methods for evaluating retention features of green roofs. For the purpose of this thesis, a rainfall simulator was designed and various types of precipitation were examined. The thesis is divided into two main parts: a theoretical part and a practical part. In the theoretical part, the importance of water retention on green roofs is discussed. In addition, a physical theory related to this topic is included and various rainfall simulators used for scientific experiments in the Czech Republic and abroad are described. The practical part deals with the measurement of droplet size and rainfall simulator design. In this part, the process of measuring the flow and the intensity of rainfall by using scales, flow meter and rain gauge is described. For this purpose, a datalogger was developed by the Faculty of Eletrical Engineering in Brno. Finally, the results are sumarized and recommendations on how to conduct the research in the future are provided.
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