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Analysis of Dubičná landslide - slope stability and soil mechanical properties
Pospíchal, Vojtěch ; Jerman, Jan (advisor) ; Racek, Ondřej (referee)
Diploma thesis Bc. Vojtěch Pospíchal Analysis of slope movement Dubičná - mechanical properties of mudstones and stability ratios ABSTRACT This thesis deals with the stability conditions of the Dubičná landslide area, which is located at the contact of two regional geological units of the Czech Cretaceous Basin and the Bohemian Central Highlands. It compares the mechanical properties of the mudstones of the Březno Formation, which were obtained through laboratory tests, with the results from another landslide site, Prackovice, where very similar geological and morphological conditions occur. Determination of critical and residual strength is essential for determining slope stability. For this purpose, laboratory tests were carried out and at the same time correlation relations were tested, which can predict strength parameters based on index parameters. Furthermore, the geometry of the landslide area with seasonal variations of the groundwater level was created. The obtained parameters and geometries were used to calculate the stability in the Plaxis program. The factor of safety is around 1, depending on the height of the groundwater level.
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Landslide susceptibility analysis of Czechia
Racek, Ondřej ; Blahůt, Jan (advisor) ; Klimeš, Jan (referee)
In geosciences modelling is rather quickly developing discipline. Statistical modelling of landslide susceptibility is relatively more traditional approach. Nevertheless, more complicated statistical methods are being developed and applied on larger areas. This development is caused especially by increasing computational capacity and software. This diploma thesis summarises existing statistical landslide susceptibility modelling approaches. In the following part, several landslide susceptibility models were created for the area of Czechia. These models were created using logistic regression, naive Bayes and artificial neural network (ANN). Additionally, two more models were created using expert driven approach. All models were made using thirteen conditioning factors, i.e.elevation, slope, engineering geological regions, climatic areas, mean annual precipitation, topographic wetness index (TWI), aspect, orogenetic class, distance from confirmed fault, distance from watercourse, internal relief, land cover and slope shape. Models driven by statistical approach were created using Orange software. Landslide inventories that were used for construction of all models are based on two databases: "Registr svahových nestabilit" and "Registr sesuvů-Geofond". Using validation by SRC, PRC and ROC curves...
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Snow avalanche modelling
Racek, Ondřej ; Blahůt, Jan (advisor) ; Uxa, Tomáš (referee)
Modelling of dynamic processes in physical geography is really quickly developing discipline. This trend is noticeable in case of snow avalanche modelling too. Following bachelor thesis is mapping snow avalanche modells and describes theirs basic principes. In the aplication part is thesis focused on use RAMMS numerical avalanche model. Experimentally verifies suitabiliti of friction coeficients for use in condicions prevailing in the Giant Mountains (Krkonoše). Friction coeficients was experimentaly stated in the Swiss Alps and tabooed in user manual. Results of RAMMS avalanche model are based on a combinaton of 36 values of friction coeficients. These results of numerical models are compared with real avalanche from 10. 2. 2015. Between real avalanche and modeled avalanche is compared run- out and area of acumulation. Friction coeficients asumed in Swiss Alps can be used for modelling avalanches in Giant Mountains. For correct dessignation of friction parameters is appropriately use run out. Results of modells strongly overvalue area of acumulation. Abstrakt Modelování fyzickogeografických procesů je dynamicky rozvíjející se obor, tudíž stejný trend sledujeme v případě modelování sněhových lavin. Tato bakalářská práce modely sněhových lavin mapuje a popisuje jejich základní principy. V aplikační...
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Achievements of czech swimmers in world championships since 1950 to 2010.
Raček, Ondřej ; Svobodová, Irena (advisor) ; Přibyl, Ivan (referee)
TITLE Achievements of czech swimmers in world championships since 1950 to 2010 AUTHOR Ondřej Raček DEPARTMENT Department of physical education SUPERVISOR PaedDr. Irena Svobodová ABSTRACT The aim of this bachelor's thesis is to refer to Czechoslovak and Czech swimmer's medal positions in European Championships, European Junior Championships, Olympic Games, World Championships, World Junior Championship and Univerziades in years 1950 - 2010 on the basis of the statistics analysis and swimming publications. KEYWORDS swimmer, achievement, world championships
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