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Supraglacial lakes detection and volume estimation from remote sensing data
Rusnák, Samo ; Brodský, Lukáš (advisor) ; Šobr, Miroslav (referee)
Supraglacial lakes detection and volume estimation from remote sensing data Abstract Supraglacial lakes play an important role in understanding glacier dynamics, including their response to climate change. This thesis explores the problematics of estimating lake depth and volume using a physical model. This brings challenges in considering the influence of various factors, such as cryoconite on glacier surface and suspended particular matter, which influences physical model, which is in research mostly neglected. Regression analysis of the g parameter of a physical model, representing light attenuation coefficient, and supervised classification of supraglacial lakes is applied in this thesis. The results reveal the variability of parameter Ad, representing lake bottom albedo reflectance, and its impact on predicted supraglacial lakes depth and volume. The results highlight the problem of global parameterisation of the physical model of supraglacial lakes and the need for further research to improve its accuracy and explore future possibilities in this field. Keywords: supraglacial lake, remote sensing, machine learning, physical model, depth estimation, regression analysis
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Anemo-orographic systems modeling in GIS
Rusnák, Samo ; Brůha, Lukáš (advisor) ; Štych, Přemysl (referee)
Anemo-orographic systems modelling in GIS Abstract The bachelor thesis proposes a model of anemo-orographic systems and implements it in a GIS environment. The key modelling factor is the snow cover shift due to the wind influence. The implemented tool is executable within the ArcGIS environment and as such is a help for localization of anemo-orographic systems, namely of the places, where the accumulation of snow cover occurs. Executable tool was tested in the Krkonoše national park area using multiple data sources describing the terrain model. Achieved results are introduced in the end of the thesis as well as their accuracy and the final map products. Keywords: anemo-orographic system, GIS, spatial modelling
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