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The evolution of Bečva river stream channel after the flood of 1997 ů the significance for research and protection
Kirchner, Karel ; Lacina, Jan ; Krejčí, O.
The flood of July 1997 altered the stream channel of middle and downstream reach of Bečva river in a significant way. Lateral as well as depth erosion removed upper layers of floodplain sediments and created new well pronounced two-level channel with variety of other fluvial forms, which have profoundly increased the biodiversity of the floodplain landscape. We focused our attention on apprehension of selected long persisting effects of flood on relief, rock environment and floodplain ecosystems as well as the possibilities of their conservation within the selected areas in the vicinity of Choryně (Vsetín District)
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Geomorphological position of coarse clastic deposits of the Lower Miocene in wider area of the Bohutický les upland in the South Moravia and their relation to neotectonic landscape evolution
Roštínský, Pavel
The contribution deals with geomorphological aspects of the Lower Miocene gravel formations in the area of Bohutický les upland in contact zone between the Bohemian Massif (built up of solid basement rocks) and basin of the Carpathian Foredeep (filled with weakly consolidated Lower Miocene clastic sediments). In the top part and slopes of the upland, numerous denudational relicts of formerly more extended sedimentary covers are situated, originated due to differential neotectonic movements in the area during syn- and postsedimentary periods. Coarse fraction is commonly preserved which were the least prone to surface destruction. During detailed mapping, three main lithological components of gravels were distinguished, their areal distribution and relations to solid-rock forms of present-day topography were studied and their possible genetic processes were outlined. The acquired information, added with borehole data, were related to landscape evolution of the wider South Moravia area.
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Sedimentary covers in the Bohutický les Upland area and their relation to the topography evolution
Roštínský, Pavel
The paper presents basic notes on geology and geomorphology of the Bohutický les Upland (South Moravia), an asymmetric horst situated in the contact area between the Bohemian Massif and Carpathian Foredeep. The distinct western scarp and some other striking morphological features of the elevation originated through the multi-phase alpine neotectonic transtensile reactivation of the important Diendorf Fault and associated dislocations in the Neogene and Quaternary. A complicated mosaic of solid Proterozoic/Palaeozoic bed-rocks, poorly consolidated Neogene clastics and Quaternary sediments developed in the area.
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Minimization of residual stresses for rolled long products
Kubík, Petr ; Raudenský, Miroslav (referee) ; Petruška, Jindřich (advisor)
This thesis deals with simulation of cooling of rail during its passing through cooling device which has been designed by the heat transfer and fluid flow laboratory. Inputs of the computational model have been set up to get best possible correspondence between outputs of the computational model and results of experimental measurement. The solution with using of model of austenitic stainless steel is provided in first part of the thesis. The solution with considering model of carbon steel is performed in next part. Using of model of carbon steel allows including evolution of latent heat during phase changing. A fields of residual stress has been calculated for different cooling conditions in the last part of this thesis.
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Summary of foreign knowledge about the origin and development of EDZ in crystalline rocks - research
Vavro, Martin ; Souček, Kamil ; Staš, Lubomír ; Vavro, Leona
Presented search summarizes findings of foreign research oriented on the origin and evolution of the excavation damaged zone in crystalline rocks with a particular focus on the essential results of experimental projects which were performed in Canada, Sweden, Finland, and Switzerland. The study is divided, excluding the introduction, into seven main chapters of the text, which gradually deal with: (1) definition of key terms, (2) overview of the main underground research laboratories in the world where EDZ assessment was conducted, (3) methods suitable for EDZ description and characterization, (4) main factors influencing the origin of failure around the excavations and time-dependent evolution of EDZ. An overview of important outcomes of EDZ experiments, focusing on the European hard rock laboratories (Stripa, Äspö, Onkalo/Olkiluoto and Grimsel), and their summary are presented in the final two chapters.\nThe review summarizing the published key findings and results of in situ experiments shows, that for rock in lower stress state, i.e. in no spalling environment, the extent and character of rock mass damage is typically dependent on the excavation method. Using mechanical excavation, rock damage zone with thickness less than 3 centimeters can be originated. The microcracks within this zone contribute to the increase of hydraulic conductivity of the rock mass. At some test sites (Äspö, Grimsel), where the tunnel boring machine technology was used, the damage zone was already detected in depth of less than 5 mm.\nOn the contrary, openings excavated by drilling and blasting are characterized by much more extensive damage zones up to several tens of centimeters in width. The damage progressively diminishes with the distance from the opening.
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Seminoles: From Corn to Hard Rock Cafe
Dolejš, Andy ; Opatrný, Josef (advisor)
This bachelor work presents historical evolution of tribe Seminole. Seminole lives in Everglades, Florida. I would like to explore psychological and social aspects of confrontation white settlers with Native Americans. History, culture and traditions of tribe.
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