|
| |
|
|
Soil and terrain changes as a result of increased erosion and accumulation processes in selected locations
Votýpka, Jan ; Šefrna, Luděk (advisor) ; Zádorová, Tereza (referee)
Soil and terrain changes as a result of increased erosion and accumulation processes in selected locations Abstract Colluvial soils are formed in areas with increased intensity of soil erosion. Colluvial soils originate as a result of their position in terrain, they are usually found in places where has accumulated erosion material. Very often they are to be found at the around of slopes. Their accumulation horizon is deeper than 25 cm with a great amount of organic carbon buried in it. In my diploma thesis I will attempt to take a closer look at three locations, each having different types of dominant soils. The aim of this diploma thesis is to rebuild the original shape of the terrain before the beginning of the soil erosion process. Keywords: colluvial soil, soil erosion, soil accumulation, land use, digital terrain model (DTM)
|
|
|
Azonal podzols in Czechia and their role in soil carbon balance
Freyerová, Kateřina ; Šefrna, Luděk (advisor) ; Zádorová, Tereza (referee)
The aim of this thesis is characterization of azonal podzols in Czechia and their role in soil carbon bilance. The emphasis was put on carbon sequeatration at subsurface mineral horizons. Two localities with this type of podzol were chosen: Ralsko and Týnec nad Labem. Carbon denstity was calculated for these two profiles: 21,107 t.ha-1 for Týnec and 25,064 t.ha- 1 for Ralsko. When the detailed data about horizons were used, the carbon denstity for Ralsko was 49,97 t.ha-1 . A lot carbon is located in subsurface horizons under 30 cm border. There were additional outputs from Ralsko profile - carbon density visualization for all soil horizons and it's course. Carbon density depends on soil horizons thickness which is very variable in azonal podzol case, therefore it was visualised as well. Possible causes of this variability was sketched. Keywords: azonal podzol, carbic podzol, humods, carbon density, windthrow.
|
|
|
Change in the soil cover structure caused by soil sealing of land: an example from the hinterland of Prague.
Duchoslavová, Eva ; Šefrna, Luděk (advisor) ; Zádorová, Tereza (referee)
The quality of soil intended for the housing development is the topic of diploma thesis. Frequently, the local soil of the highest quality is built on. For the purpose of this thesis there were 5 model areas defined: these are the areas of Roudnice, Říčany, Slaný, Vlašim, and Kolín. The thesis describes the quality of soil which is built on in these areas. The extent of housing development in these areas is specified on the basis of landscape plans. As such, it is possible to determine the quality of soil intended for the future housing development. Moreover, the thesis deals with the legislative protection of soil. Keywords: BPEJ, landscape plan, occupy soil, areas of Roudnice, Říčany, Slaný, Vlašim, Kolín
|
|
|
The Quality of soil AND DEGRADATION OF SOILS. THE CASE - STUDY OF SOME ARCHAEOLOGICAL SITES
Poništiak, Štefan ; Šefrna, Luděk (advisor) ; Zádorová, Tereza (referee)
This diploma thesis inquires into the quality of the soils at 30 archaeological sites from the periods from Late Bronze Age to Early Bronze Age (1 250 - 450 BC). The aim of the thesis is to prove the dependence of the ratio of the cultivated cereals on the soil and other environmental factors in various regions. The secondary aim is the general observation of the changes, which could appear from this period until now. These changes are represented by the erosion, researched by various methods. The overview of the literature aims to the short description of the archaeological sources from the period, various approaches to the soil evaluation until present as well as information about the soil erosion and tools for its research. The conclusion of the thesis is that the ratio of the cultivated cereals depends mostly on the sea level, secondly on other environmental factors (included the soil quality). The results of the thesis are influenced by number of factors, discussed in the conclusion Keywords: soil quality, cereals, archaeological sites, perimeter of kilometre, soil erosion, late bronze age, early iron age
|
|
|
Physical-geographical aspects of vegetation succession and soil development with focus on abandoned mining sites
Zamazalová, Kateřina ; Chuman, Tomáš (advisor) ; Zádorová, Tereza (referee)
The thesis focuses on the background research of pedogenesis and vegetation succession within a primary succession. An attention is paid to abandoned mining sites. The role of a rock sub-soil is emphasized. The found facts was examined on samples, where the dependency of pH and amount of organic carbon in soil on substrate and type of vegetation was examined. Statistically significant differences in soil and vegetation development on different substrates were not found, however there was observed the influence of carbonate substrate from neighborhood. This substrate allowed in a sililic quarry a formation of nutrient rich vegetation similar to that described in limestone quarries. Humidity of the soil and groundwater table depth were suggested as more determining in vegetation succesion, especially in life forms domination. Primary successsion was influenced by neighborhood of the area in many aspects.
|
|
|
Anthracological analysis of chernozems in Czechia
Danková, Lenka ; Zádorová, Tereza (referee) ; Šefrna, Luděk (advisor)
This thesis deals with a pedogenesis of chernozems in Czechia (Central Europe). It solves a problem with open landscapes in Central Europe, further a role of man and fires in formation of this soils and relation between colour of chernozems and the content of black carbon. In my thesis is represented pedoanthracology as a method, which can be useful for future study of open landscapes in Central Europe and for an influence of man. In this thesis, there were also analysed two chernozemic soils with Raman spektrometry. It was found out, that chernozems was probably formed under forest-steppe vegetation with residue of post glacial steppe. Anthropogenic activity and fires could be new factors of pedogenesis of Central European chernozems. It was showed a strong relation between colour and content of BC. Raman spectrometry found a presence of BC in our analysed soils.
|
|
|
Paleosols of Zemechy Loess Ravine
Vejrostová, Lenka ; Zádorová, Tereza (referee) ; Šefrna, Luděk (advisor)
This bachelor thesis is concerned with paleosols of Zemechy loess ravine. It is divided into three main parts. In the first part the issue of paleopedology, position of soil in Quarternary cycle of climate and sedimentation and methods of study of paleosols are being dealt with. Next part of the bachelor thesis is concerned with methods and data sources used in the thesis. Its main purpose is to give basic characteristics about the region of interest. In the third part of the thesis information and facts obtained are summarized and discussed. Outcome of the thesis is to characterize paleosols of Zemechy loess ravine (aim of the thesis) and a basis for future work of the author. Key words: paleopedology, fossil soils, Quarternary, Zemechy loess ravine, Kralupy nad Vltavou
|
|
|
Colluvial soils - their characteristics and spatial delineation at chosen study areas in the Czech republic
Zádorová, Tereza ; Šefrna, Luděk (advisor) ; Borůvka, Luboš (referee) ; Sobocká, Jaroslava (referee)
Colluvial soils, formed in areas of increased accumulation of soil material, represent an important element in landscape and soil mosaic, whose development is still in progress. Their spatial distribution and profile thickess are considered to be important indicators of processes leading to significant landscape changes. Their importance also consists in very deep humus horizon which makes them a vast storage of organic carbon. Mapping of colluvial soils represents a substantial contribution in the update process of classic soil maps. The aim of the thesis is a complex analysis of the colluvial soil unit in terms of its relation to soil properties, terrain and geological predispositions and relevance in soil mapping. The study results are based mainly on detailed terrain survey, digital terrian model analysis and modern pedometric methods application. The research was proceeded in three study areas with significant pedological and geological differences and various predisposiotion for colluviation intensity and velocity and resulting character of colluvial profiles. Diverse character of the study areas was the main factor of the spatial distribution and properties of the colluvial soils. In Chernozem region, intensive erosion resulted in formation of colluvial soils characterized by thick humus...
|
|
| |
guest ::
