|
|
The analysis of selected parameters of water quality
KŘÍŽOVÁ, Iveta
Cílem této diplomové práce je provést analýzu vybraných ukazatelů kvality pitné vody a posouzení faktorů, které ji ovlivňují. V první části jsou zachyceny vybrané mikrobiologické ukazatele, tak jak je popisuje literatura, včetně platných norem a vyhlášek. Druhá část popisuje průběh provádění vlastní analýzy, z poskytnutých materiálů akreditovanou laboratoří společnosti AGRO-LA, spol. s r. o., až po vyhodnocení získaných výsledků.
|
|
|
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.
|
|
|
Effect of temperature, fish size and feeding on oxygen consumption and ammonia excretion in the Nile tilapia (Oreochromis niloticus)
DENKOVÁ, Adéla
Aim of this work were to assessed the impact of feeding, temperature, stocking density, fish size and water temperature on ammonia excretion and oxygen consumption of Nile tilapia (Oreochromis niloticus) in recirculating system. Concentration (saturation) of oxygen, water temperature and pH were measured using multimeter and concentration of ammonia was assessed by direct Nessler method. For assessing of effect of fish size, three groups of tilapias weighed 25, 65 and 140 g were established, each group in four replicates. For assessing of effect of feeding was tilapias (body weight 65g) divided into groups fed continuously, two meals per day and four meals per day, each group in four replicates. For assessing of effect of stocking density was tilapias (body weight 65g) divided into groups of 20, 50 and 80 kg.m-3, each group in four replicates. All experiments were performed for water temperature of 23, 27 and 31 °C and for fed and starved fish. Mean daily oxygen consumption was higher for smaller fish categories than for bigger ones and grow rapidly after feeding. The kind of feeding had impact on diurnal fluctuation of oxygen consumption. It was also confirmed that tilapia can survive low level of oxygen concentration for a quite long period.
|
|
|
The influence of permanent grassland on the water quality
DVOŘÁKOVÁ, Jitka
This bachelor thesis deals with the influence of permanent grassland on the water quality. A list of related terms and historical development of grassland in the Czech Republic is given in the introductory part. The following part describes the way permanent grassland is used in the Czech Republic at present. The main part of the thesis covers the influence of grassland on the water quality and case studies dealing with this issue are mentioned, too. The aim of the thesis is to describe the influence of grassland on the water quality and to highlight the importance of maintaining grassland in our landscape.
|
|
|
Concentration of nutrients and their transport from catchment area
JIRKOVSKÁ, Veronika
This work aims to approach the problems of the increasing concentrations of nutrients in the catchment area and then in the entire complex of the natural components, especially in water. In most of my work I deal with the problematic nutrients that affect the quality of water, that means nitrogen and phosphorus. Next there is also described the cycle of the both observed nutrients in nature and also characterized the factors that influence the leaching of these nutrients out into the water (from catchment area). This has also the connection with the evaluation of human activities that significantly interfere in the development of the landscape components and the consequences that come with these activities mainly relating to the pollution of water structures. My work is also briefly focused on the situation of the development of water quality in the world and in the Czech Republic in conjuction with the way, how water was and has been influenced by human activities.
|
|
|
The Influence of the pasture on selected environmental components.
KAŇOKOVÁ, Markéta
This thesis deals with the influence of pasture on specific components of the enviroment in the Czech Republic, especially the influence on water regime. The thesis aims to poit out the negative and possitive effects of pasture and provides a complete view on this issue. The first part of the work describes in detail the history of pasture farming, the importance of pasture in CR and pasture systems. Next it examines the influence of pasture farming on vegetation cover and water quality. Pasture plays a significant role in landscape with erosion ? protection, cultivation and landscape design effect, but pasture also affects the level of dustiness. No doubt pasture is the most natural way how to farm permanent grasslands and i tis an important nature protection factor.
|
|
|
Evaluation of water quality and runoff characteristics in the Jenínský stream catchment.
KROPÁČEK, Robin
The aim of this thesis is to evaluate water quality and runoff characteristics in the Jenínský stream catchment. For this purpose analysis and data processing was performed. Two subcatchments, called J1 and J2, were monitored at this catchment area. Period of interest involves years 2008-2012. Results were compared with the period 1983-1985 when most of the land was used as arable land. The decrease in the concentrations of all evaluated indicators was caused by grassing and reduction in the use of fertilisers. Ranges of the values of selected indicators also decreased distinctly and their concentrations are stabilized. The greatest decrease of 79% (J1) and 87% (J2) was found in average ammonium concentrations. A beneficial effect of land use change to extensive agricultural management on water quality was proven.
|
|
|
Redundant fingerling of perch (Perca fluviatilis L.) in Vír Reservoir and its impact on other trophic levels
VEJŘÍK, Lukáš
The composition and preferences of depth levels and habitats of pelagic fingerling was studied in the canyon-shaped Vír Reservoir during years 2009-2011. The perch (Perca fluviatilis) fingerling was dominant in all three years. The density of fingerling was above the mean in years 2009 and 2010. It was as many as 278 individuals in 100m3(mean is 52 individuals in 100m3). A marked fall on 1,9 individual in 100m3 was registered in 2011. Perch fingerling was mainly observed in metalimnion during the day and also at night, where concentration of oxygen was very low. The highest density of perch fingerling was observed in the middle part within longitudinal profile. A significant difference was found in food composition among the years with high density and low density of fingerling. A predation of carp (Cyprinus carpio) and bream (Abramis brama) was proved during the years with high density of fingerling.
|
|
|
Vstupní analýza problematiky současného stavu sledování a hodnocení ekologického stavu povrchových vod a biomonitoringu v ČR
AQ-Service, s.r.o., Brno ; Zahrádka, Jiří ; Hodovský, Jan
Analýza je vstupním dokumentem pro studii komplexního řešení sledování a hodnocení ekologického stavu povrchových vod v ČR a k odborné diskusi nad touto problematikou. Byla zpracována na základě srovnání požadavků právních předpisů Evropských společenství souvisících s touto problematikou a zjištěným stavem řešení (implementace) problematiky v současnosti v České republice. Analýza byla zaměřena na čtyři hlavní cíle, a to definice požadavků (zejména implementace požadavků Rámcové směrnice vodní politiky), systém řízení a koordinace řešení požadavků (způsob a efektivita řízení řešitelů, systém zabezpečení proveditelnosti řešení), přístup řešitelů (způsob řešení, efektivita zvoleného přístupu) a možné negativní dopady a východiska (možné důsledky neefektivních řešení a absence výstupů, varianty efektivních řešení).
|
|
| |
guest ::
