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Research of old rockfalls using LiDAR data
Rusá, Veronika ; Štefanová, Eva (advisor) ; Pavelka, Karel (referee)
This thesis addresses the issue of detecting and modeling old rockfalls using LiDAR data. The study area chosen for investigation is Dlouhý Důl, located in the České Švýcarsko National Park. The main objective of this research is to map, retrospectively analyze, and model historical rockfall events. To achieve this, a comprehensive workflow for modeling rockfalls using open-source software was proposed and tested. The specific goals of the thesis included processing the laser data to create a point cloud and conducting data quality checks. A crucial aspect was determining the optimal viewing angle for analysis. The software PosPac and RiProcess were utilized for data preprocessing. Another important step was the generation of a Digital Relief Model (DMR), essential for detecting and modeling rockfalls. The point cloud filtering and segmentation were pursued as ancillary objectives and tested using two software applications, CloudCompare and OPALS. For the evaluation and modeling of rockfalls, QGIS with the QPROTO plugin was employed. Additionally, a literature review on the development and methodologies related to rockfalls was conducted. The theoretical section describes the definition of rockfalls, including the factors contributing to slope movements, as well as LiDAR technology, point cloud...
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Slope deformations in the Bohemian Paradise - research, typology and conditions of origin
Merlíčková, Soňa ; Hartvich, Filip (advisor) ; Blahůt, Jan (referee)
This thesis deals with occurrence, conditions and character of slope deformations in the Protected landscape area (CHKO) Český ráj. This area is typically formed by sandstones, marls and claystones. Together with tectonic structures and lateral erosion of the Jizera River, they form suitable conditions for slope movements such as rockfall, sliding etc. With help extensive use of the scientific literature, character of study area as well as general conditions for the development of slope movements were described, and their typological classification was established. Next part of the thesis includes the chapters on the methods of research, and a description of the preliminary field research of the model localities. Furthermore, an analysis of causes of the slope movements using the data on climate from the stations of Czech hydro-meteorological institute was performed. Finally, the results are discussed with the referenced sources and conclusions to the topic are formulated. Keywords: CHKO Český ráj, slope movements, slope deformations, tectonics, lateral erosion, land-slide, rockfall, Lužický fault
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Use of rock mass classifications for rock fall susceptibility analysis in the conditions of the Bohemian Massif
Racek, Jonáš ; Blahůt, Jan (advisor) ; Petružálek, Matěj (referee)
This thesis deals with rock mass classification systems. The aim of the thesis is to describe and compare selected systems and evaluate their possible use in the Bohemian Massif for assessing the stability of the rock slopes in relation to their susceptibility to rock falls. A part of the thesis deals with rock falls and basic mechanical characteristics of a rock mass. Further on, the thesis describes selected classification systems, specifically RQD, RSR, RMR, SMR, Q-system, Q-slope, GSI, RSR-PR and QTS. These systems were then used for evaluation of stability of rock slopes on three geologically different locations of the Bohemian Massif. information from measurement in field and processing of measured data was used for assessing for possible use of each classification system.
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Use of rock mass classifications for rock fall susceptibility analysis in the conditions of the Bohemian Massif
Racek, Jonáš ; Blahůt, Jan (advisor) ; Petružálek, Matěj (referee)
This thesis deals with rock mass classification systems. The aim of the thesis is to describe and compare selected systems and evaluate their possible use in the Bohemian Massif for assessing the stability of the rock slopes in relation to their susceptibility to rock falls. A part of the thesis deals with rock falls and basic mechanical characteristics of a rock mass. Further on, the thesis describes selected classification systems, specifically RQD, RSR, RMR, SMR, Q-system, Q-slope, GSI, RSR-PR and QTS. These systems were then used for evaluation of stability of rock slopes on three geologically different locations of the Bohemian Massif. information from measurement in field and processing of measured data was used for assessing for possible use of each classification system.
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Slope deformations in the Bohemian Paradise - research, typology and conditions of origin
Merlíčková, Soňa ; Hartvich, Filip (advisor) ; Blahůt, Jan (referee)
This thesis deals with occurrence, conditions and character of slope deformations in the Protected landscape area (CHKO) Český ráj. This area is typically formed by sandstones, marls and claystones. Together with tectonic structures and lateral erosion of the Jizera River, they form suitable conditions for slope movements such as rockfall, sliding etc. With help extensive use of the scientific literature, character of study area as well as general conditions for the development of slope movements were described, and their typological classification was established. Next part of the thesis includes the chapters on the methods of research, and a description of the preliminary field research of the model localities. Furthermore, an analysis of causes of the slope movements using the data on climate from the stations of Czech hydro-meteorological institute was performed. Finally, the results are discussed with the referenced sources and conclusions to the topic are formulated. Keywords: CHKO Český ráj, slope movements, slope deformations, tectonics, lateral erosion, land-slide, rockfall, Lužický fault
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