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Mathematical model of groundwater flow affected by circulation wells
Nedvěd, Jakub
In this thesis, I focused on numerical modelling of groundwater flow in the vicinity of groundwater circulation well (GCW). The thesis can be devided to two parts. In the first one, I created a simple numerical model of GCW. I used a cylindrical flow domain because of the radial symmetry of the problem. The task was to find out which parameters have the biggest influence on groundwater flow. It was found that the hydrogeological settings and hydraulic properties have more considerable effect on GW flow than the well construction parameters. Distance between the well screens is the only important construction parameter, other parameters can be neglected. However, we cannot neglect the influence of hydraulic properties of the porous medium. Considering the radius of influence of GCW, the presence of aquitards and anisotropy of layers affect the groundwater flow around the well seriously. These two parameters cause the extension of the radius of influence, which leads to a longer path of the particle of water. The travel time of particles increases too this slows down the remediation. A big influence has also an intensity of natural groundwater flow in the area because it decreases the radius of influence of the well. In the second part I created a numerical model of pilot site Velká Hleďsebe to investigate...
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Mathematical model of groundwater flow affected by circulation wells
Nedvěd, Jakub ; Mls, Jiří (advisor) ; Ondovčin, Tomáš (referee)
In this thesis, I focused on numerical modelling of groundwater flow in the vicinity of groundwater circulation well (GCW). The thesis can be devided to two parts. In the first one, I created a simple numerical model of GCW. I used a cylindrical flow domain because of the radial symmetry of the problem. The task was to find out which parameters have the biggest influence on groundwater flow. It was found that the hydrogeological settings and hydraulic properties have more considerable effect on GW flow than the well construction parameters. Distance between the well screens is the only important construction parameter, other parameters can be neglected. However, we cannot neglect the influence of hydraulic properties of the porous medium. Considering the radius of influence of GCW, the presence of aquitards and anisotropy of layers affect the groundwater flow around the well seriously. These two parameters cause the extension of the radius of influence, which leads to a longer path of the particle of water. The travel time of particles increases too this slows down the remediation. A big influence has also an intensity of natural groundwater flow in the area because it decreases the radius of influence of the well. In the second part I created a numerical model of pilot site Velká Hleďsebe to investigate...
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Circulation wells and their mathematical modelling
Nedvěd, Jakub ; Mls, Jiří (advisor) ; Šantrůček, Jaromír (referee)
Groundwater is our priceless natural resource and it is our duty to protect it and to take care of its quality. That is the reason why several techniques of pollution removal have been developed; the Groundwater Circulation Well technique (GCW) is one of them. This system enables us to clean contaminated groundwater effectively and in-situ (it means that there is no need to extract groundwater to the surface). This thesis is aimed at collecting and presenting our actual knowledge of the most common GCW systems. In the first part of the thesis the basic kinds of the GCW are introduced and their principles are presented. The remediation mechanisms are further described with respect to the character of the particular contamination. The chemical and biological processes controlling the contaminant degradation are described. Several experiments that were carried out and monitored in order to study the efficiency of GCWs are presented. In the last part of the thesis the mathematical modelling of GCWs is introduced. The partial differential equations governing the processes of flow and mass transport in the well surrounding parts of aquifers are presented and the corresponding initial and boundary conditions are formulated. The obtained numerical results and conclusions of their comparison with measured data are...
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Volunteers, the international brigades and the Spanish Civil War, 1936-1939
Nedvěd, Jiří ; Nálevka, Vladimír (referee) ; Kvaček, Robert (advisor)
This thesis deals with the Czechoslovak volunteers of the International Brigades during the Spanish civil war 1936-1939. The maj or aim of the paper is to work up this topic wi thout the ideological obj ecti ves, which were until recently qui te common in the Czech (or Czechoslovak) writing about the volunteers. It is specially focused on those aspects, which were in the communist historiography the most distorted ones (e.g. the attitude of Soviet Union and the international communism to the Spanish war, the role of KSČ etc.). Therefore it is based primarily on the foreign scientific literature and the archive research. The first two chapters briefly discuss the history of the Spanish civil war and its international context as a necesarry background for the following analysis of the International Brigades. The former is concentrated on the inner (IISpanish") roots of the conflict and its development, more closely on the relations between the leading forces within the loyalist zone and on the dual role of Spanish communists. The latter then treats the international aspects of the civil war, which were of the main importance for its conclusion. It shows different attitudes of the major world Powers, both the intervention of the fascist dictatorships on the Francoist side and the nonintervention concept of the...
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Evaluation of the Financial Situation of the Selected Company
Vybíralová, Veronika ; Nedvěd, Jan (referee) ; Zemánková, Lenka (advisor)
The bachelor thesis deals with the evaluation of the financial situation in the selected company. The theoretical part will be focused on the theoretical basis, basic concepts, methods and indicators of the financial analysis. In practical part the theoretical basis will be applied on the particular company in order to find out current status of the company. Measures for correcting the problems will be presented in the last part of thesis.
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The Study of Order Processing through Organization
Hűbsch, Ivan ; Nedvěd, Jan (referee) ; Jurová, Marie (advisor)
The Bachelor’s thesis analyses the process of project management in company. The current project management process is rather old and a full review is essential. The aim of this work is to propose an improvement to make the project management process in the sales phase more effective whilst correcting the out of date procedures.
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Dynamic spot analysis in the 2D electrophoresis gels images
Polášková, Lenka ; Provazník, Ivo (referee) ; Nedvěd, Jiří (advisor)
Práce shrnuje faktory a parametry, které ovlivňují výsledky 2D elektroforézy, se zaměřením na zpracování obrazu jako jeden ze způsobů snížení nesprávné interpretace jejích výstupů. Proces zpracování obrazu využívá jako zdroj dat především obrazů z opakovaných provedení téhož pokusu, neboli víceplik. Pomocí analýzy obrazů víceplik je možno pozorovat nebo korigovat změny jednoho pokusu a také porovnávat je s výstupy jiných pokusů. Cílem práce je poskytnout podporu specialistovi, který má na starosti popsat vlastnosti struktur nacházejících se v elektroforetických obrazech.
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Fractal of DNA sequence data
Nedvěd, Jiří ; Čech, Petr (referee) ; Valla, Martin (advisor)
This project is looking for fractal structury in DNA sequence data, which be maped in square ACGT. First, this project is introduced in problematics of fractals and targeted on making of Sierpinski gasket. Second, the project is introduced in DNA and DNA sequence. Next is sketched now known fractal’s structures in DNA sequence data or fractal’s structure closed DNA sequence. Then will changed metod chaos game of Sierpinski gasket to square ACGT, in where will drawen map of DNA sequences. Next, these pictures will processed by Box Counting Method and Power Spectrum Method.
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Processing of fractal genomic signals
Nedvěd, Jiří ; Provazník, Ivo (referee) ; Valla, Martin (advisor)
This diploma project is showen possibilities in classification of genomic sequences with CGR and FCGR methods in pictures. From this picture is computed classificator with BCM. Next here is written about the programme and its opportunities for classification. In the end is compared many of sequences computed in different options of programme.
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