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Ichthyologic monitoring the flow of Popelka in Nová Ves nad Popelkou
ZELENKA, Václav
The aim of this work is to evaluate ichtyofauna in the stream Popelka, to determine the species composition of fish stoce and to determine the dominant fish species, their abundance and size variability. Throughout the length of the flow, twelve catching sites were identified there, the length of each site was about 50 m, the catch in these sites was from the bottom of the upstream towards the end. The catch of the flow was by wade manner with use of an electric aggregate. All caught fish species were subsequently determined. Also the body lenght so-called ?standart lenght? was measured. After measuring all fish that were caught were gently given back to the place of the catch. In terms of abundance the most numerous species in Popelka was brown trout represented by 477 subjects followed by stone loach with 391 subjects. These species clearly dominated in Popelka. Another occurring species were rainbow trout with 49 subjects, brook charr with two subjects and hybrid of brown trout and brook charr with one subject. With regard to the regional constance the brown trout was a species almost always present, with presence in 11 out of the 12 sites. Stone loach with incidence in 8 locations was mainly occurring species. With the appearance in 5 localities the rainbow trout was frequently occurring species. Among the species that are rare in Popelka, there were brook charr occurring in two locations and hybrid of brown trout and brook charr with the appearance in one location. Index of species diversity by Shannon and Wiener for the flow of Popelka is 0.88 and evenness is 0.55. Size variability across the flow in body length of brown trout was ranging from 46 to 308 mm, in diameter 126.4 mm, the stone loach from 41 to 130 mm, in diameter 80.1 mm, the rainbow trout from 65 to 250 mm, in diameter 88.7 mm and brook charr from 290 to 313 mm with an average of 301.5 mm. In the Popelka stream with a total length of 12 km there are four species of fish in these fish communities. Species diversity is distinctly poorer in comparison with the other streams. It would be appropriate to repeat the catch in the future to determine the stability of fish population in Popelka stream.
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Cost - Benefit Analysis on noise limits increase
Zelenka, Václav ; Vojáček, Ondřej (advisor) ; Ropický, Jan (referee)
The objective of the thesis is - with the aid of cost benefit analysis - evaluate economic impacts of planned amendment to Regulation of the Government No. 148/2006 Coll. On Health Protection from Adverse Effects of Noise and Vibration, namely based on the case of specific road track. Amendment to Regulation is aimed at making existing noise limits softer (to increase them) and thus to bring about savings in investment cost connected with anti-noise measures. The thesis intends to use a single case study to find out whether benefits resulting from price reduction in the process of road construction are higher than costs in the form of decrease of welfare caused by the higher noise exposition; alternatively at what period savings in costs connected with road construction equal to decrease in welfare (savings in costs are one-off, while increase in noise exposition and related drop in welfare are long-term). Estimated changes in welfare are based on analysis of secondary sources -- first of all on the study of traffic externalities in the Czech republic conducted by contingent valuation method. The actual core of the thesis is cost benefit analysis. Attention is paid also to broader discussion on experience in providing exceptions from noise limits in the Czech Republic.
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Solution of Traffic Noise in Perspective of Neoclassical and Liberal Economics
Zelenka, Václav ; Vojáček, Ondřej (advisor) ; Lipka, David (referee)
Basic concepts used in the bachelor theses are defined in the introductory part, in particular noise and indicators applied in noise assessment. A brief description of current state of noise situation in the Czech Republic takes up. It focuses on overstaying of noise limits and determination of territory affected by noise. The next part of the theses is devoted to potential solutions of noise issues in neoclassical and liberal economics. In terms of neoclassical economics, especially economic evaluation of noise and cost -- benefit analysis are dealt with. Within liberal economics, attention is paid to civil law suits and judicial verdicts in noise causes. The closing part of the theses compares both neoclassical and liberal approaches and submits advantages and disadvantages of their solution of noise issues.
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