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Siltation of the Jirkov and Křímov water reservoirs
Němečková, Pavla ; Šobr, Miroslav (advisor) ; Chalupová, Dagmar (referee)
This bachelor's thesis contains detailed physical and geographical characteristics of the area and the comparison of the bathymetric methods. In the practical part it is focused on water reservoirs Křímov and Jirkov, which were built in the 1950s and 1960s. The main goal is to find out current conditions of water reservoirs using Acoustic Doppler Current Profiler (ADCP) RiverSurveyor M9 on the float, which offers automatic data saving. The bathymetric maps are created in ArcGIS Pro 3.0.2 by processing the measured data from 2022 and using the Kriging interpolation method. The current volume is compared to data from digitalized historical maps. The difference between these data gives us the amount of sediments and also the change of volume in every depth level. The current volume of WR Křímov corresponds to 1.31 mil. m3 , there was 6.4% silting compared to operating regulations. The Jirkov water reservoir has a current volume of 1.95 million m3 , in comparison to the operating regulations, there was only 3% silting. Key words: WR Křímov - WR Jirkov - bathymetric mapping - siltation
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Sediment analysis and hydrological regime of water reservoir Všechlapy
Wolfová, Helena ; Šobr, Miroslav (advisor) ; Kliment, Zdeněk (referee)
This masters thesis is focused on the evaluation of anthropogenic sediment pollution and the total estimate of the siltation of the Všechlapy reservoir. Based on bathymetric mapping, the morphometric parameters of the Všechlapy reservoir were evaluated. By digitizing the old map of the previous terrain before the construction of the dam, its current siltation of 15.7 % with bedload sediment was determined. Bedload sediments and river sediments of two streams were collected, in which the grain size analysis of the fine-grained fraction and the chemical analysis by pseudo-total digestion were performed to determine the content of metals and metalloids. Evaluation of sediment pollution was performed using geoaccumulation index using global and local background values of the natural environment. It was found that the Bouřlivec stream was rated the worst pollution classes in terms of cadmium, arsenic, copper, lead, zinc and nickel. Based on their chemical properties, these increased concentrations were also reflected in the samples taken from the bed of the Všechlapy reservoir. Part of this thesis was also the review of the hydrological regime of the Všechlapy reservoir. key words: sediment pollution, water reservoir Všechlapy, Bouřlivec stream basin, bathymetric survey, aqua regia leaching
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New bathymetric map of Odlezelské lake
Hulec, Filip ; Šobr, Miroslav (advisor) ; Kliment, Zdeněk (referee)
jezero je nejmladším přírodním jezerem v Česku. Od jeho vzniku dochází intenzivnímu zanášení jezerní pánve a jezero spěje k mapování jezerní pánve, analýza jejích změn a zanášení jezera. Byla zpracována tři etrická měření - letech 2003 a 2014 byly hloubky odečítány z echolotu a měření příčných profilech, v roce 2017 byl použit modul RiverSurveyor na dálkově automatickým ukládáním dat. Všechna měření byla zpracována interpolaci byla využita metoda ordinary kriging. Pro analýzu změn jezerní pánve byla použita i data z porovnání zjištěných dat vyplývá, že objem jezerní pánve se zmenšil mezi lety 1972 a 2017 o 40 . Na základě změn objemu byly stanoveny rychlosti zanášení jezerní pánve, které se ale při porovnání různých měření liší. Podle dat z let 2003 a 2017 až v
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