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Dynamics and influencing factors of development of gullies in the Kokořínsko
Kašpar, Vít ; Treml, Václav (advisor) ; Kliment, Zdeněk (referee)
Although gully erosion represents an important process of land degradation, only a few studies in the Czechia have quantified the gully erosion rate yet. Because of the complex and nonlinear dynamics, the estimation of the gully erosion rate requires a long term and technically difficult research. However, a recent methodological approach in dendrogeomorphology allows to reconstruct a gully development and assess gully erosion rate. Based on geodetic survey, a detailed mapping of four gullies in the Polomené Mountains was carried out. Subsequently, the gully erosion rate was evaluated by the analysis of 73 exposed roots of broadleaved trees. The first erosion episode was detected in 1981, however, most of the roots were exposed in the last 15 years. Gullies have been forming non-continuously showing median erosion rates between 10.0 to 13.4 mm/year. Even though topographic parameters and land use changes in drainage basin area may affect the intensity of erosion, most of the erosion episodes have been probably triggered by extreme rainfall events. This study exemplifies that intesive gully erosion may occur even on forest soils. Vegetation cover influences a morphology of gully slopes, but its ability to prevent intensive gully erosion is limited. Keywords: gully, erosion rate, exposed roots,...
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Response of sedimentation and erosion rates to changing human pressure
Kašpar, Vít ; Treml, Václav (advisor) ; Šefrna, Luděk (referee)
While on the continental or global level and across the long time-scales, erosion and accumulation processes are largely governed by tectonics, terrain properties, geological settings and climate play a key role on the landscape or local levels and on short time scales. However, from the Neolithic onwards, human society has become an important factor affecting erosion-accumulation processes. As a result of agricultural activities, population expansion and land use changes soil has been washed downslope by soil erosion associated with formation of gullies. Furthermore, an increase of deposition rates was observed for colluvial, alluvial and lake deposits. The aim of this thesis is to review past soil erosion and accumulation processes connected with land use changes within the central Europe during the Holocene. 37 case studies documented generally strong relation between land use intensity and erosion and accumulation processes. First phase of anthropogenic accelerated erosion-accumulation processes was recorded in the late Eneolit period; however, the most remarkable acceleration of soil erosion occurred during landscape colonisation in the High Middle Ages. The second part of thesis aims at dating of two gullies in the Polomené hory Mts. Formation of gullies was studied using exposed roots. In...
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Web standards and responsive webdesign
Kašpar, Vít ; Benda, Petr (advisor) ; Havránek, Martin (referee)
The Bachelor's thesis Web standards and responsive webdesign deals with methods and procedures that are suitable for developing responsive website. The thesis also includes familiarization with the origins and history of webdesign and related technologies that it draws upon. The thesis is devided into theoretical and practical subsection.
Theoretical part deals with the history of the web, the development of HTML to its latest version of HTML5 and its semantics, Cascading Style Sheets and its innovations, history of web browsers and particularly techniques suitable for creating responsive web.
The practical part is focused on creating a responsive website using methods and procedures derived from the theoretical subsection.
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