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Analysis of the zone of recent deglaciation, Cordillera Blanca, Peru
Juřicová, Anna ; Vilímek, Vít (advisor) ; Burda, Jan (referee)
The master thesis is focused on analysis of the zone of recent deglaciation in the Cordillera Blanca, Peru. Geomorphological mapping that had been realized based on interpretation of the satellite data and field reconnaissance was used for interpretation of main geomorphological features and processes of the selected glacial valleys. Glaciofluvial processes and mass movements are the main processes that affected the relief in the recent period. Major differences in landforms presence and distribution have been found between the studied valleys. The main differences are between valleys located on the western side and eastern side of the mountains. Number of different sediments of different types have been identified on the western side, whereas no evidence of such sediments was found on the eastern side. These differences are probably caused by differences in geology and climatic conditions. Finally, a general sediment flux model on the information gained from the geomorfologic analysis has been created and shows space distribution of geomorphological features and processes. The analyses of the satellite data show different visual characteristics of the rocks, which has been confirmed during field works using Schmidt Hammer method. The results suggest that the rocks that have been exposed for longer time due...
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The Glacial Retreat in the Cordillera Blanca since the Littel Ice Age
Dobíhal, Michal ; Vilímek, Vít (advisor) ; Emmer, Adam (referee)
Michal Dobíhal Studijní program: Geografie Studijní obor: Fyzická geografie a geoinformatika Bakalářská práce Vedoucí práce, školitel: Doc. RNDr. Vít Vilímek, CSc. The glacial retreat in the Cordillera Blanca since the Little Ice Age ABSTRACT: The term Little Ice Age refers to a cooling period of time, as a result of this cooling mountain glaciers experienced significant advance in many parts of the world. Conventionally, the period between the 16th century and the middle of the 19th century is stated for the Little Ice Age, but its course and time placement differs in individual world regions. Based on research of scientific literature, this thesis aims at describing correct time placement of the Little Ice Age in the southamerican mountain range Cordillera Blanca and the expanse of the glacier retreat since its maximum till the present. Methods of lichenometry used for dating "Little Ice Age" moraines are mentioned as well. In the analytical part, the area of the glaciation of selected glaciers from the Little Ice Age maximum and from the present is compared using polygon measurement and satellite images. The extrapolation of this method is subsequently made on other selected glaciers, whose moraines have not been dated yet. Keywords: Cordillera Blanca, Little Ice Age, glacial retreat, moraine, lichenometry
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Use of remote sensing for monitoring of degaciation
Soudková, Kristýna ; Vilímek, Vít (advisor) ; Štefanová, Eva (referee)
Use of remote sensing for monitoring of deglaciation The study deals with the monitoring of glaciers using remote sensing techniques. It compares the possibilities of optical and microwave sensing. The work tries to find a suitable method or type of sensor for detecting ice, snow and clouds in satellite images. In the practical part there was demonstrated unsupervised classification on the image of SPOT satellite in the area of Mount Huascarán. Images of Landsat satellite were used for identification of deglaciation in Cordillera Blanca, Peru. Key words: remote sensing, glaciers, monitoring of snow, Huascarán
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