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National Repository of Grey Literature

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Problems of wells and water in the Křelovice village PAVLÍKOVÁ, Kateřina In my bachelor's thesis I wrote about problems of wells and water in the village Křelovice. I chose this village because I live there. I wanted to find new information about local water sources, their capacity and quality. My work is divided into two main parts - theoretical and practical. In the theoretical part I wrote about Křelovice and local water sources. I also wrote about indicators of drinking water quality acording to the legislative limits. I specified various indicators of water when we can find them in drinking water, how to eliminate them and how they affect the human body. I wrote a hygienic limit to each indicator of water quality which shouldn´t be exceeded. In the practical part I wrote about objectives of the work, hypothesis and research question. The goal of my work was: evaluate water quality from the local water source in Křelovice and find out the opinion of the population of the village of the quality of the local water source. I chose two research methods. As the first method I used a quantitative research. I prepared my own questionnaires for it. I gave these questionnaires to one hundred forty people who live in Křelovice. This number is a representative sample of 300 inhabitantes of the village older than 18 years. Then I analyzed the questionnaires and I made a color graph with a description to the each question. As the second method I chose secondary data analysis. The most information I recieved from the territorial workplace Pelhřimov of the Regional Station of Hygiene and the other from the mayor of Křelovice Ing. Jaromír Dolejš. I statistically processed the datas and compared them with hygienic limits that are determined by the legislation. Then I made graphs for the better visibility and orientation. After evaluating the quantitative research, I found out that the villagers are very satisfied with the quality of drinking water from the local sources. It is obvious that the municipality does everything for keeping the good quality of drinking water. Results of samplins of water corresponded with the public opinion. In last five years hasn't been exceeded hygienic limits which are set by the legislation. It means that the respondents are rightly satisfied with the quality of water. I think that my research showed not only a good quality of drinking water and the satisfaction of residents but also that the quality of water is regularly checked by statutory regulation. I think that the residents can be sure that the water is really high-quality so they needn´t be worry of using and drinking water from the public water sources. My research is also good for the municipal council headed by the mayor. I have clearly demonstrated that water quality is high and residents are very satisfied. Detailed record

HYGIENIC QUALITY OF FISH FROM SIGNIFICANT FISHING WATERS BEROUNKA 1, LUŽNICE 6, OTAVA 4, OTAVA 7 (P) BARTOŇ, Jiří The main aim of this study was to evaluate hygienic quality of fish from significant fishing waters: Berounka 1, Lužnice 6, Otava 4, Otava 7 (P). Sampling was performed in 2010 by electrofishing and fishing rods. 173 individuals belonging to 13 different fish species were fished. The samples of fish muscle were analysed for the following substances: Hg, Pb, Cd, PCB, DDT and its metabolites (DDE and DDD), a-HCH, b-HCH, y-HCH, HCB. Samples of bream (Abramis brama) muscle were collected at all monitored sites (exception was Otava 7) and bream was used as reference species to compare the contamination among monitored rivers. The results were compared with valid hygienic limits. The values of contamination were in most cases very low and far below the limits. Only mercury was identified as a risk contaminant in all monitored rivers. Average concentrations of mercury in the muscle of bream were in the range of 0.261-0.284 mg/kg and were comparable in all rivers. The hygienic limit for mercury (0,5 mg/kg) was exceeded only in 4 cases - one individual sample of bream from Otava, two mixed samples of asp (Aspius aspius) from Berounka and Lužnice, one mixed sample of perch (Perca fluviatilis) drom Otava. The highest value of total mercury content (0.768 mg/kg) was found in asp from Lužnice 6. All concentrations of persistent organochlorinated pollutants in fish muscle were far below the valid hygienic limits. The only health risk was posed by increased content of mercury. Detailed record

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