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Impact of uncoventional technologies of soil cultivation on soil quality
Suchá, Kateřina ; Doležal, Petr (referee) ; Kameníčková, Ivana (advisor)
Agricultural land is being handled by various tillage of soil which affects properties of soil. There are two types of tillage treatment. These are conventional (classic) tillage with plowing and minimization tillage (plowing is excluded). The aim of this particular work is to assess the quality of the soil near the village of Bohaté Málkovice, which is being (long-term) handled by minimization tillage. As indicators of soil quality, we used selected physical and physico-chemical characteristics, which are determined from analysis of disturbed and undisturbed soil samples from the top soil layer (0-10 cm) by standard methods in laboratory conditions. The theoretical part describes the basic physical properties of the soil and the ways of their determination. The practical part is devoted to the presentation of the examined locality and the results of selected physical and physico-chemical properties of the soil are presented and subsequently evaluated. In the conclusion, the impact of used tillage in Bohaté Málkovice on the selected soil properties is assessed.
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Revitalization and flood control on the river Oslava and selected tributary
Kopuletý, Martin ; Vrba, Jan (referee) ; Veselý, Jaroslav (advisor)
The thesis is focused on the flood protection of the town of Oslavan on the river Oslava and its tributary Balinka. Sample samples were taken to determine the grain curve. The input data were obtained from the Povodí Moravy s. p. and were calculated in the HEC-RAS program. A level and flood analysis was developed and flood control measures were proposed. The flow was again calculated with the proposed measures and re-analyzed. At the end of the work the proposed measures were evaluated.
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Comparation of methods of granulometrical analysis of coarse fluvial sediments
Bakešová, Veronika ; Hartvich, Filip (advisor) ; Bernsteinová, Jana (referee)
This bachelor thesis deals with the granulometrical analysis of coarse fluvial sediments. A granulometrical analysis is analytical study for finding the percentual representation of each fraction. Granularity is the basis for classification of clastic sediments. Clastic sediments are sedimentary rocks consisting of the rock fragments transported to the place of sedimentation in the solid state. Coarse clastic sediments are rocks in which predominate particle size greater than 2 mm. The theoretical part of this work contains the physico-geographical characteristic of the studied area and the methods used to research grain size of fluvial materials, especially coarse clastic. The experimental part of this work describes the surface sampling method - the digital photography and image processing in the Digital Sedimetrics Gravelometer software. Both investigated streams have similar granularity. The most of the particles from streams falls into the category of grain size 2 - 10 mm. Flows differ only slightly different distribution of fine- grains and medium-sized gravel.
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Analysis of the factors influencing the geotechnical material parameters of MSW landfills
Sedláček, Václav ; Kudrna, Zdeněk (advisor) ; Slomek, Jiří (referee)
The material of Municipal Solid Waste landfills is a varied mix of materials with different properties. This material changing his properties according the procesing before or after the material is stored in landfill body. While the conditions in the landfill body are suitable, the bacteria start the development of biodegradation process. The process is affected by a number of factors. During the process, a large volume of lanfill gas is released from the landfill body and the landfill surface is declining. Material composition with processing methods during and after the transportation of waste to the landfill create geotechnical parameters of fresh material. As time goes by, this material loses biodegradable ingredients. The biodegradation process takes several years in the space of lanfill body. For the proper process of biodegratation, it's important to compliance next parameters: Sufficient organic matter content, sufficient material moisture and stable temperature with pH. Keywords: Municipal solid waste, geotechnical properties, grain, moisture content, shear strengh, strain, elasticity, deformation, compaction, biodegradation processes
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Analysis of the factors influencing the geotechnical material parameters of MSW landfills
Sedláček, Václav ; Kudrna, Zdeněk (advisor) ; Sedláček, Jaroslav (referee)
Geotechnical parameters of material of Municipal Solid Waste (MSW) landfill are very variable. This work searches by science researches the influences for these parameters. The identification of parameters is obviously difficult and needs special devices capable to measurement of big volume of material. Influence for geotechnical parameters have composing of MWS, climatic conditions, of the MSW landfill is cover or not, if has landfill isolation on base and on top or not or if is landfill drained. Important factor is existence of biodegradation processions on landfill. There are important the velocity of biological component and time.
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Quantitative description of textures in volcanic rocks: Case study of trachybasalt from Dubičná
Ditterová, Hana ; Dolejš, David (advisor) ; Rapprich, Vladislav (referee)
- iii - ENGLISH ABSTRACT Quantitative description of textures, in particular, the distribution of grain sizes, is becoming a powerful tool for interpreting kinetic processes that govern crystallization of igneous rocks. Variation in grain size are frequently represented by logarithm of population density vs. linear crystal size, where the majority of igneous rocks forms a linear trend. Its slope provides an estimate of characteristic grain size, or growth rate and crystallization time, whereas the intercept provides the nucleation density. The log-linear trend is predicted to result from kinetic nucleation and growth processes only, whereas its modifications such as kinks or curvature are due to mechanical separation or accumulation of crystals, magma mixing or Ostwald ripening (coarsening) in the presence of melt. In order to investigate the true, three-dimensional crystal size distribution, the raw two-dimensional data acquired from thin sections or rock slabs must be processed by various stereological methods. We illustrate application of quantitative textural measurements to distribution and origin of clinopyroxene crystals in a trachybasaltic lava flow from Dubičná near Úštěk. This effusion belongs to Cenozoic volcanic products in the Bohemian Massif, specifically to its main Eocene-Miocene stage in...
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Comparement of results from infiltration tests
Blahut, Dominik ; Mazáč, Petr (referee) ; Duchan, David (advisor)
The aim of this thesis is to compare the results of water infiltration from field tests, from laboratories and from numerical modeling at two selected locations. The first objective is the search procedure and the description of both sites and its adjacent areas. Further work continues with infiltration field tests using ring infiltrometer, at first theoretically for each method, and then practically with own personal measurements in the field. Further from the collected soil samples the measurements are performed in the laboratory, first in the permeameter, and followed by the grain size distribution test, from which the hydraulic conductivity is derived by using empirical formulas. At last the numerical modeling is used and all the results are compared. In the final phase of thesis the recommendations are given for infiltration at various locations and comparsion of the infiltration methods.
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Assessment of soil quality processed with conventional tillage in the selected site in the Olomouc region
Drlíková, Barbora ; Doležal, Petr (referee) ; Kameníčková, Ivana (advisor)
Diploma thesis documents the problems of soil quality, which is assessed on the basis of physical, chemical or biological indicators of soil quality. The paper describes the various indicators, its methodology and evaluation. In the practical part evaluates the quality of soil cultivated with the traditional way - using plowing. The experimental area, where the samples were taken from the soil, lies in the Olomouc region in the municipality Šumvald. Evaluated were selected physical, chemical and physico-chemical properties of soil, e.g. particle size distribution, bulk density, porosity, air capacity, hydrolimits, pH, carbonates, humus content and salinity of the soil.
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Sanding process and sanding abrasives for wood
Kříženecký, Ondřej ; Sarvašová Kvietková, Monika (advisor) ; Gašparík, Miroslav (referee)
This bachelor thesis deals with the process of sanding and abrasive materials for wood. It characterizes the process equalize inequality surface of the wood and wood-based materials, which is important operations in the finishing products with highest quality level. It describes the basic methods of machining and sanding their effect on the final surface quality. In the introductory section concisely describes the history of sanding. The next part deals with the main factors affecting the sanding process and their influences on sanding wood. The main part is dedicated to the distribution of abrasive instrument. The structure of abrasive and its characteristics. Describes kinds of abrasive materials and their features. It analyzes the production of abrasive. The next sections deals with the determination of surface quality, surface preparation before sanding, repairing defects and storage of abrasive intruments. The last part analyze the machinery for wood sanding and their distribution. Describes a circular, cylindrical and belt sanders and their characteristics.
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Compactibility of the materials for subgrade
Kolbábek, Jiří ; Varaus, Michal (referee) ; Stehlík, Dušan (advisor)
This thesis is focused on differences between compaction of fine-grained and coarse-grained soils. It presents selected compaction methods and it describes their principles and implementation procedures. In the practical part is performed classification of both types of soils and then samples are compacted by three methods. The result of this work is to compare the effects of compaction on fine-grained and coarse-grained soil.
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