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Hazard evaluation from GLOFs in the Cordillera Huayhuash
Baťka, Jan ; Vilímek, Vít (advisor) ; Šobr, Miroslav (referee)
Hazard evaluation from GLOFs in the Cordillera Huayhuash Abstract: Proglacial lakes in high-mountain regions recently experienced dynamic development related to the ongoing climatic changes. Most of the mountain ranges were widely studied with respect to hazards posed by proglacial lakes. However, the Peruvian Cordillera Huayhuash was omitted by any research of this type so far. In this thesis first, the author develops and assesses the inventory of glacial lakes in the Cordillera Huayhuash, and second, evaluates the hazard from GLOFs. After a thorough discussion and comparison to other world's major mountain ranges, significant conclusions are made. Most of the characteristics of the lakes in the Cordillera Huayhuash are influenced by a local factor - fluvial erosion that has occurred since the last glacial maximum. Nevertheless, general principles such as the statistical distribution of lakes according to their elevation that are valid to other compared regions may still be identified based on the data. Lakes of the Cordillera Huayhuash generally pose minor or even no GLOF hazard, the few exceptions were further analyzed in detail. Key words: geomorphology, GLOF, lake inventory, natural hazards, Peru
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Hazard evaluation from GLOFs in the Cordillera Huayhuash
Baťka, Jan ; Vilímek, Vít (advisor) ; Šobr, Miroslav (referee)
Hazard evaluation from GLOFs in the Cordillera Huayhuash Abstract: Proglacial lakes in high-mountain regions recently experienced dynamic development related to the ongoing climatic changes. Most of the mountain ranges were widely studied with respect to hazards posed by proglacial lakes. However, the Peruvian Cordillera Huayhuash was omitted by any research of this type so far. In this thesis first, the author develops and assesses the inventory of glacial lakes in the Cordillera Huayhuash, and second, evaluates the hazard from GLOFs. After a thorough discussion and comparison to other world's major mountain ranges, significant conclusions are made. Most of the characteristics of the lakes in the Cordillera Huayhuash are influenced by a local factor - fluvial erosion that has occurred since the last glacial maximum. Nevertheless, general principles such as the statistical distribution of lakes according to their elevation that are valid to other compared regions may still be identified based on the data. Lakes of the Cordillera Huayhuash generally pose minor or even no GLOF hazard, the few exceptions were further analyzed in detail. Key words: geomorphology, GLOF, lake inventory, natural hazards, Peru
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The analysis of supraglacial lakes: case study from Cordillera Blanca, Peru
Baťka, Jan ; Vilímek, Vít (advisor) ; Emmer, Adam (referee)
The analysis of supraglacial lakes: case study from the Cordillera Blanca, Peru ABSTRACT: Supraglacial lakes play an important role in the processes of glacier ablation. Through their expansion, a proglacial lake that usually poses significant threat to downvalley located areas can form. Such formation of proglacial lakes also took place and was well described in the Peruvian Cordillera Blanca (e.g. Laguna 513). However, there are only few studies relating to supraglacial lakes of this range. First in this thesis, based on the research of the scientific literature, the factors influencing supraglacial lakes' development and some of the limnological characteristics are listed in detail. Second, recent evolution (2003-2014) of supraglacial lakes of the Cordillera Blanca is analysed on the sample of 13 glaciers. The results show that the development of supraglacial lakes is influenced by their frequent destructions (because of outbursts and/or rapid accumulation of debris in the basin). In addition, the expansion of the extent of supraglacial lakes on a glacier tongue is strongly controlled by surface gradient. Keywords: glaciers, supraglacial lakes, Cordillera Blanca, Peru
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