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Moisture regime in near sub-surface of porous rocks: measurement and visualization
Weiss, Tomáš ; Bruthans, Jiří (advisor) ; Migoň, Piotr (referee) ; Kumar, Navneet (referee)
Moisture regime in near sub-surface of porous rocks: measurement and visualization Doctoral thesis Tomáš Weiss Charles University, Faculty of Science Abstract The near-subsurface of porous rocks plays a critical role in hydrological, physical, and chemical interactions between the atmosphere and the lithosphere. Hydrologically, the area can be conceptually divided into two zones: the dry surface layer and a deeper zone with capillary water, separated by the so-called evaporation front between the zones. Since salts tend to crystallize at the evaporation front, knowledge of its depth is important for understanding weathering processes. However, measuring the depth of the front is difficult, as differences in water content above and below the front are too low to measure by most methods. This thesis presents new methods for studying the evaporation front and tests them in a variety of lithologies and climates. Na-fluorescein dye was used for visualization of the front either as a direct application to the material in the form of solution or powder or as a part of a moisture probe on which the dye dissolves in the capillary zone. This moisture probe (named uranine- probe) was successfully tested and used in a range of porous rock types, from sandstone and limestone to rhyolite, building materials, and soil;...
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Valley evolution of the Kladská Bělá river
Stemberk, Jakub ; Štěpančíková, Petra (advisor) ; Migoň, Piotr (referee) ; Adamovič, Jiří (referee)
The PhD. thesis deals with the morphostructural evolution of the valley network of the Biala Lądecka river, (further refer as BL) during the Late Cenozoic. In this work, the selected methods as geomorphological research (morphostructural analysis, geomorphological mapping), structural-geological research (paleostres analysis) and geophysical survey on selected sites were used, to answer the questions of river basin development and its relationship with predicted tectonic activity within the area, as well as with anticipated or already known paleohydrographic changes. The BL basin is situated within the Rychlebské hory Mts. / Góry Złote (northern and eastern parts of the basin), Králický Sněžník (southern part) and the Krowiarki Mts. (western part) in Poland. The Marginal Sudetic fault zone, which represents one of the most important tectonic zones in the Central Europe, passes in vicinity of the study area as well as the regionally important Bělský fault, which passes directly through the BL basin. The results of the analysis indicate that the BL basin has undergone very complex development due to tectonic movements since Miocene up-to-day. Based on the results of the paleostress analysis, which was performed on the dated volcanites in Lutynia - Lądek Zdrój area, the parameters of the palaostress...
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