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Possibilities of interpolating lakes basins of various genetic types
Kuchařová, Jana ; Štych, Přemysl (referee) ; Šobr, Miroslav (advisor)
The goal of this work is to try to find the most suitable interpolation method for particular types of lake basins. The chosen lakes for this objective are Prášilské, Laka, Čimice and Labiště pod Opočínkem. The main ambition of this work is to use software counting of interpolation methods instead of counting by hand. As much as possible interpolation methods will be used to reach the most accurate outcome and to set the most feasible method for each lake. The same interpolation methods will be used for each bathymetric profile, but one suitable method is not supposed to be found for all the types of lake basins.
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Glacial hydrological regime, case study of lake Adygene (Tien - Shan, Kyrgyzstan)
Beitlerová, Hana ; Kocum, Jan (referee) ; Šobr, Miroslav (advisor)
This thesis is concerned with detailed analysis of glacial hydrological regime and its influencing factors. Knowledges published in the domestic and foreign scientific literature were applied on data acquired in the area of Adygine Lake (Tien - Shan, Kyrgyzstan). The lake is a part of a lake system recently developed in the surroundings of a retreating glacier. There is a potential risk of dam failure in terms of its stability. Lake level fluctuations depending upon climatic conditions, melt water inflow and capacity of subsurface outflow channels were observed. Key words: glacial regime, glacial lake, melt water, glacier melt, diurnal variations, seasonal variations, delay of runoff
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Changes of rainfall-runoff regime in the Stropnice river-basin
Volková, Alena ; Janský, Bohumír (referee) ; Šobr, Miroslav (advisor)
This paper deals with the rainfall-runoff regime in the Stropnice river-basin and its development. The aim of this paper is to answer the question of‚were there any changes in the runoff regime during the period 1945 - 2009, and if so, were these changes conditioned by climate or were they caused by human interventions' (e. g. river network modification, changes of the land cover, drainage systems development etc.). The single-mass and double- mass curves were used as the primary methodology. The homogeneity of the time series of mean discharge, precipitation and air temperature were statistically tested using Mann-Whitney-Pettit test and Mann-Whitney test. The Mann-Whitney-Pettit test was performed using the programme AnClim (v5.012), which is freely available online, the Mann-Whitney test was performed using SPSS 15.0. Non-parametric Mann-Kendall test was used for the trend detection, performed in MULTMK/PARTMK by C. Libiseller and A. Grimvall, also freely available online. Some changes in the runoff regime were uncovered in the early 80s', when the runoff decreased, which also happened after 1988. During these periods almost no annual flood occured. The first decrease of the runoff was caused by a drier season in the 80s'. The second decrease after 1988 was probably caused by a build-up of the...
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Hydrological regime of the Labský důl Valley
Ducháček, Libor ; Jeníček, Michal (referee) ; Šobr, Miroslav (advisor)
The glacier valley of Labský důl is one of the most significant relicts of the Pleistocene mountain glaciations in the Czech Republic. Majority of research in this area has been focused on geomorphologic patterns and hydrological characteristic was touched just marginally. This work contains basic hydrographic and hydrologic characteristics based on the understanding of the local environment. Detailed research was implemented on the part of the watershed closed by the water level gauge installed by PřF UK. There is described the watershed reaction during different rainfall episodes and it is evaluated according to hydrological balance equation. It was used several interpolation methods to reach the influence of the particular parts of the equation. The most important content of this file lays in hydrological regime and first of all in amount of data and information, which could be used to create rainfall-runoff model of the Labe River. Powered by TCPDF (www.tcpdf.org)
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Channel dynamics of the restored Sviňovický Brook
Hujslová, Jana ; Kliment, Zdeněk (advisor) ; Šobr, Miroslav (referee)
The aim of this thesis was to monitor and to evaluate development and morphological dynamics of the Sviňovický Brook channel after the restoration in 2005. Field surveying and aerial images by low-flying model planes were used to detect recent channel dynamics after the restoration in 2005. Channel changes were compared to water level measurements. The additional method was grain size analysis of bed sediments. Orthoimage and cadastral maps were utilized to document changes in channel position over the past 160 years. Field surveying detected intensive bed and bank erosion in restored channel caused by high stream velocity from the fortified upper flow. The restored channel has markedly widened and deepened. The largest changes occurred during floods in July 2006. The intensive eroding- depositing processes remodeled the channel. The changes in channel bed level were up 30 cm and bank erosion locally exceeded 1 meter. The longitudinal profile of the channel was leveled. The road bridge began to be obstacle to the longitudinal profile development. It causes deposition upstream and erosion downstream. The largest bank disruptions in the sector up the road bridge were fortified by quarried stones at the end of 2007. The channel has not shown any significant changes since 2007. With the growing density...
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Changes of rainfall-runoff conditions and anthropogenic modification in Lomnice River basin
Bažatová, Tereza ; Šobr, Miroslav (advisor) ; Langhammer, Jakub (referee)
The runoff from a landscape is a natural process which is very complicated. It's not simple to express the runoff process in general because it depends on many factors that participate more or less in its course. The main aim of this paper is the explanation of rainfall-runoff process in Lomnice River basin, the land use changes description and the evaluation of anthropogenic modifications of Lomnice River. All of these elements influence the course of hydrological extremes. Another parts of this thesis concentrate on floods (especially flood 2002) in the Lomnice River basin and on water systems of Blatensko which is the third largest of all water systems in the Czech Republic. The relationship between a rainfall and a runoff in Lomnice River basin is being assessed with the help of the simple- and double-mass curve method, regarding possible changes caused by anthropogenic impacts. This part contains the analysis of trend in development of land use, the analysis of air temperature and snow parametres as well. Great anthropogenic changes of river channels and river floodplain can evoke dramatic geomorphological effects. The methodology of research - anthropogenic modifications of Lomnice River is based on a field survey of anthropogenic transformation of a riverbed and river floodplain. Then the...
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