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Erosion control geotextiles on slopes along roads
Stoklasová, Lucie ; Kalibová, Jana (advisor) ; Petrů, Jan (referee)
The thesis is focused on erosion control on steep slopes along roads, primarily using erosion control geotextiles. The first part of the thesis provides a review on water erosion. Next, the thesis emphasises the importance of erosion control and describes possibile methods of mitigation or elimination of soil erosion on steep non-productive slopes using geotextiles. Another chapter is focused on the classification of geotextiles and how to use them in practice. The second part of the thesis presents three specific projects where erosion control geotextiles and geocells have been applied. In the end, the author discusses the suitability of methods applied in the examined projects and suggests a chronological classification of individual geotextile-products according to their effectiveness. This ordering may serve as an useful tool during the decision-making process when designing erosion control measures on steep slopes along roads.
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Methods of Measuring Rainfall Characteristics
Holubová, Nikola ; Petrů, Jan (advisor) ; Gregar, Jan (referee)
Atmospheric precipitation is the most important meteorological phenomenon on the Earth. Therefore, more and more studies about its structure and properties have been created. Many researches describing characteristics and measurements of the precipitation have been created for more than one century. The first manual techniques, such as the method using a filter paper, which were used by the end of the 19. century, were very inaccurate. Demands on more modern techniques of measurement were rising during the 20th century. Many fully automatic devices for measuring of the precipitations characteristics were developed. Advances in technology have also had a lot of shortcomings. Some of them have been resolved, but some still exist.
The first part of this research work is focused on the precipitation and its importance, origin and extremes. The second part of the work deals with the precipitation characteristics, offering a comprehensive overview about the sizes of drops, their shape or the speed of the fall. The methods of measurement and their advantages and disadvantages are described in the third part.
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Measurement rainfall kinetic energy using laser disdrometer
Jelínková, Petra ; Petrů, Jan (advisor) ; Hrabalíková, Michaela (referee)
The issue of water erosion is spread all over the world. It is closely related with soil aggregates breaking up and the subsequent soil nutrients loss. The total and intensity of rain are important parameters for determining the kinetic energy of rain. The measurement of rain characteristics was done in the laboratory at Czech University of Life Sciences Prague. To obtain the data rain simulator and laser disdrometer were used. With its help the intensity, volume, spectrum, even size and falling velocity of rain was found out. Overall 90 measurements were taken which describe the simulated rain characteristics in detail. Each measurement took 5 minutes. The kinetic energy was found out from the size of raindrop and its falling velocity. The average intensity of rain was 58.6 mm/h and reached KEtime 706,6 J m2/h. The droplets diameter median of all measurements was set in range of 0.375 to 0.5 mm.
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Botanical survey of a restored segment of the Jedlový stream (Šumava National Park)
PETRŮ, Jan
The thesis is part of project "Bohemian Revitalization of wetlands and peatlands". The aim is to catch up the current state (before revitalization) of vegetation and flora with possibility of the existence of rare endagered species in Fir Stream plains in the Southern Bohemia, district Prachatice, cadastral area Volary. There was engaged generic list of plants in this interest locality. There was defined by the 6 permanent areas with dimensions 4x4 m. I made a complete inventory of all found species. Overall, it was found 38 plant species: 11 monocotyledonous plants, 25 dicotyledonous plants and 2 bryophytes.
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Using of leisure time in families with pre-school children in the region of the city Pelhřimov
PETRŮ, Jana
The thesis deals with leisure time in families with pre-school children in the region of the city Pelhřimov. It desribes conception of the leisure time in families with one or more children. The theoretic part talks about family, follows up its meanings and functions in human life. There is a short description of development of the family in modern time and some specifics of the families with younger preschool children too. Then there are desribed relationships in family (depending on the number of children in the family) and an intergenerational learning process. The next section is devoted to leisure time and its role in human life. We will find there a definition of a leisure time, a brief look at the historical evolution of this phenomenon in modern time and some of its specifics in contemporary family life. The work next deals with some socio-psychological characteristics of younger pre-school children with regard for leisure time. There are written some characteristics of the Pelhřimov?s region related to leisure time. The researching part of the work describes how the conception of the leisure time looks in the family of younger pre-school children in the Pelhřimov?s region. It highlights some of the differences in the conception among families with one or more children too. In a selected population sample survey was carried out using semi-structured interviews. They were then processed using a triple-coding grounded theory.
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Strategie a metodická podpora udržení a rozvoje zeleně v urbanizovaném prostoru
Projekce zahradní, krajinná a GIS, s.r.o., Brno ; Löw & spol., s.r.o., Brno ; Finstrle, Luděk ; Svoboda, A. M. ; Švamberk, Zdeněk ; Petrů, Jaroslav ; Javorková, Lenka ; Motl, Ivo ; Wolfová, Hana ; Hlinovská, Milada¨ ; Lacina, Darek ; Zapletalová, Olga ; Fridrich, Lubor ; Vaculová, Kateřina ; Langar, Filip ; Maděra, Petr ; Kynčl, Milan ; Hudec, Karel ; Nováková, Miriam ; Štelcl, Václav ; Hartl, Pavel ; Choroboczková, Milada ; Beneš, Martin
Cílem projektu je získat poznatky a údaje o přírodních parcích, významných krajinných prvcích (VKP) a územních systémech ekologické stability (ÚSES) v urbanizovaném prostoru a na základě jejich kritického vyhodnocení zpracovat typologii těchto nástrojů ze zákona 114/1992 Sb. Podle typologie a rozboru problémů při vymezování ÚSES bude navržen soubor legislativních, ekonomických, správních a organizačních opatření a nástrojů k usměrňování rozvoje přírodních parků, VKP i ÚSES v urbanizovaném prostoru. Projekt je výrazně aplikační, pro využití obcemi.
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The communication between parents and children at the age of 18 Conflicts relating to usage of teenage boys and girls' leisure time
PETRŮ, Jana
The bachelor thesis was drawn up with a focus on conflicts which are formed in communication in the family between parents and adolescents at the age of 18. The goal of the thesis was to determine whether gender of adolescents has influence on causes of conflicts between parents and adolescents or not. The theoretical part contains family influence on adolescents? free time and her function. It also explains the term communication and mentions some ways of inadequate communication in the family. As well as it describes psychological and social characteristics of adolescents and some differences in thinking and behaviour of each of the genders. This part deals with evolutional functions of conflicts according to Ericson and Montemayor and it also illustrates several concrete conflicts between parents and their children. The goal of the practical thesis was to determine whether there are important differences in causes of conflicts between parents and adolescents at the age of 18 according to the gender. In selected group of population a questionnaire research in electronical form was effected. The statistic processing of results showed that in causes of conflicts between parents and adolescents at the age of 18 there aren?t any statistically important differences in dependence on the gender.
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