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Water Politics
Dvořáková, Dana ; Vojtěchovský, Miloš (referee) ; Sterec, Pavel (advisor)
The work is aimed at familiarizing the audience with the problems of water in the Czech Republic and its distribution within the landscape. However, its character, which approaches to documentary work, doesn´t explicitly describe the problem, but rather attempts to visualize it and give the viewer space for his own imagination. The work draws in contrast the examples of fine functional interventions in the landscape with examples of monstrous concrete structures - dams. It points to problematic places and tries to convey to the viewer the current issue not only in the chosen location. The main thing is the lyrical performance, which evokes not only a video but also the sound part and the narrative that explains the whole problem. The video is not purely informative, its specificity is also focused on the enjoyment of the viewer. He plays with documentary techniques but does not use them as a priority. The shots are deliberately chosen so that the concrete buildings look monumental and have their seriousness. The background of the shots also shows the time of their creation. This element is supposed to be critical and is supposed to be opposed to studies that use old plans to build new water reservoirs that do not give space for a more efficient solution. The work also touches on the overproduction and issues of today's modern agriculture.
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The effect of barriers on riverine fish communities
Kofentová, Nikola ; Horká, Petra (advisor) ; Čech, Martin (referee)
The construction of river obstacles is considered one of the major threat to freshwater ecosystems worldwide, with a greater impact upon riverine fish than any other human activity. River obstacles, especially dams and weirs, affect the natural environment in streams and rivers, causing changes in physical, chemical and biological processes and disrupting connectivity of rivers via alternating series of lotic and lentic reaches. The effect of obstacles is further magnified by associated habitat alterations like are channelization, flow regulation, fortification and deepening of a riverbed. Orga- nisms and especially fish that live in rivers are highly sensitive to these changes, which affects them at the level of individuals, species and the whole populations. The most pronounced is the barrier-effect to upstream and downstream migration and loss of habitats. Diadromous and rheophilic species of fish are the most sensitive ones as they have complex migration strategies and habitat requirements. Fish are further affected by obstacles via many other mechanisms, such as the effect on reproduction success, growth and development, changes in the composition and trophic structure of communities and restricted response to further environmental constraints including water pollution or predicted climate...
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Water Politics
Dvořáková, Dana ; Vojtěchovský, Miloš (referee) ; Sterec, Pavel (advisor)
The work is aimed at familiarizing the audience with the problems of water in the Czech Republic and its distribution within the landscape. However, its character, which approaches to documentary work, doesn´t explicitly describe the problem, but rather attempts to visualize it and give the viewer space for his own imagination. The work draws in contrast the examples of fine functional interventions in the landscape with examples of monstrous concrete structures - dams. It points to problematic places and tries to convey to the viewer the current issue not only in the chosen location. The main thing is the lyrical performance, which evokes not only a video but also the sound part and the narrative that explains the whole problem. The video is not purely informative, its specificity is also focused on the enjoyment of the viewer. He plays with documentary techniques but does not use them as a priority. The shots are deliberately chosen so that the concrete buildings look monumental and have their seriousness. The background of the shots also shows the time of their creation. This element is supposed to be critical and is supposed to be opposed to studies that use old plans to build new water reservoirs that do not give space for a more efficient solution. The work also touches on the overproduction and issues of today's modern agriculture.
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Influence of reservoirs on communities of river flow
Lavičková, Šárka ; Černý, Martin (advisor) ; Tátosová, Jolana (referee)
Construction of dams significantly affects the chemical, biological and physical properties of the flow below the dam. These changes include a decrease in the numbers of individuals one or more species, the complete disappearance of species, or the introduction of non-native species. Disruption of natural water flow also applies to animals, who have only one stage of their life (usually reproduction) connected with the aquatic environment, although they are not permanent residents. Also necessitate significant changes in the life cycles of native plants and animals near the regulated river. Basic principles of behavior impounded flow describes the concept of serial discontinuity, which assumes that the construction of the dam will break river continuum, which then causes changes in river communities. Undergoing significant change such as flow regime in the river below the dam, the most striking changes are caused by the flow hydroelectric power stations. In addition, a temperature change in the flow decreases turbidity and often the availability of nutrients, because the location of the dam with the usual outlets (high or medium) acts as a trap sedimentary particles of organic and inorganic origin. It is important but also the contact area of the river, for example, reducing the zaplavovaného...
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Secundary trout zones and occurrence of grayling (Thymallus thymallus) in the territory of the Czech Republic
Halačka, Karel ; Lusk, Stanislav ; Vetešník, Lukáš
In this paper, the relationship between emergence of secondary trout zones below dams, and occurence of the grayling in the waters of the Czech Republic, is studied. The grayling was mentioned as a potentially perspective fish for our waters. This was confirmed by colossal growth of its catches in 1970s and 1980s. The space formed by creation of the secondary trout zones below series of dams, which were built at that time, was very significant for this growth. However, at the turn of the century, a breakpoint was observed, and the numbers of catches decreased to the level of the 1950s. It can be stated that these locaties appear very suitable for this species under specific conditions. However it is necessary to monitor the general dynamics of this biotope, in order to possibly establish an optimal regime fit for present organisms and therefore to form a stable equilibrium.
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