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Reaction of surface water and groundwater to the hydrological drought in 2015-2018 in the Upper Lužnice river
Husarik, Pavel ; Burian, Alois (advisor) ; Šobr, Miroslav (referee)
The Bachelor's thesis focuses on the examination of drought as an extreme and complex phenomenon. It provides a clear overview of its types, causes, and impacts on the landscape and society. Furthermore, it discusses the response of surface and groundwater to dry periods. The theoretical conclusion specifically analyzes the period of hydrological drought in the Czech Republic between 2015 and 2018. In the practical part, the characteristics of monthly and annual discharges are evaluated, and the response of surface and groundwater is assessed using data. Data from both surface and groundwater, as well as precipitation totals from the ČHMÚ (Czech Hydrometeorological Institute) observation network, were utilized. Average precipitation totals were also taken into account. The evaluation of time series was performed in terms of precipitation-runoff regime, including exceedance lines and monthly flow distributions. The results indicated that the lowest average flows were recorded in 2018, which also saw the lowest average groundwater level. Conversely, the highest number of dry days occurred in the studied period in 2015. Keywords: surface water, groundwater, hydrological drought, the upper Lužnice river
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Manifestation of flood in June 2013, Upper Lužnice River
Jaček, Matouš ; Šobr, Miroslav (advisor) ; Havlíková, Petra (referee)
This thesis is about progression of chosen fluvial lakes in the upper basin of the river Lužnice. Observed changes were mainly caused by flood in spring 2013. This area is located by national border with Austria. This part of the river is very preserve and almost without human modifications. The Lužnice river is floating throw floodplain creating meanders and also many fluvial lakes. This area is very useful for research in flooding and changes they cause. First part of this thesis is focused on work with literature about fluvial lakes, their changes and characteristic, about floods and their effect on landscape and about the river Lužnice itself. The second part is about measuring and evaluating changes on four fluvial lakes. These lakes were mapped and measured and those measuring were compared to the measuring made before flood in June 2013.
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Interaction of groundwater and surface water under period of hydrological drought in the floodplain of the upper Lužnice River
Korejs, Tomáš ; Šobr, Miroslav (advisor) ; Janský, Bohumír (referee)
The object of this thesis si to evaluate the interaction of groundwater and surface water under the period of hydrological drought in the floodplain of the upper Lužnice river. The thesis tries to show the influence of the groudwater in the river floodplain during the period of hydrological drought and its correlation with the surface water state. The area of interst of the upper Lužnice is characterized by a unique ecosystem of unique natural value. It is a preserved river floodplain, which plays an irreplaceable role in fluvial processes, especially in water retention. The objectives were solved based on the monitoring of groudwater and surface water states from data obtained from the PřF UK profiles, which are represented by boreholes aross the floodplain and level meters in the watercourse. From the data obtained, it was possible to create a final analysis and to determine the behaviour and the mutual interaction between the surface water and groundwater in this natural floodplain. A detailed analysis has confirmed, that the interaction between watercourse and the floodplain and its retention potential. It can be said that during the hydrological drought, the water state or discharge in the watercourse is improved by water from the floodplain. The subsidy is only evident in certain stretches of...
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Runoff extremity in the Upper Lužnice catchment area
Musil, Jan ; Janský, Bohumír (advisor) ; Kocum, Jan (referee)
Thesis subject is the evaluation of runoff and flood regime of rivers Lužnice and Skřemelice at the closing profiles just before their confluences. The results are compared with findings from the profile Pilař, which were published in the past by other authors. More attention is paid to the evaluation of the hydrological year 2013 and in detail is described the flood in June of the same year. Daily flow data from the years 1971 - 2014 were used for evaluating of runoff conditions. The assessment of the runoff regime in terms of daily, monthly and annual flows were compared with the runoff regime in Pilař gauge station. The source regions with dominating influence on the resulting runoff were discovered. Analysis of the flood regime confirmed that spring floods in Lužnice came mainly from upland and hilly parts of catchment and large summer floods have main source area in the catchment of Lužnice river itself, before the confluence of the Lužnice river and Skřemelic river. When assessing flood in 2013, the main source areas of flood flows that hit Lužnice river basin were founded. The flood extremity was compared in each closing profiles.
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Manifestation of flood in June 2013, Upper Lužnice River
Jaček, Matouš ; Šobr, Miroslav (advisor) ; Havlíková, Petra (referee)
This thesis is about progression of chosen fluvial lakes in the upper basin of the river Lužnice. Observed changes were mainly caused by flood in spring 2013. This area is located by national border with Austria. This part of the river is very preserve and almost without human modifications. The Lužnice river is floating throw floodplain creating meanders and also many fluvial lakes. This area is very useful for research in flooding and changes they cause. First part of this thesis is focused on work with literature about fluvial lakes, their changes and characteristic, about floods and their effect on landscape and about the river Lužnice itself. The second part is about measuring and evaluating changes on four fluvial lakes. These lakes were mapped and measured and those measuring were compared to the measuring made before flood in June 2013.
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Comparing Study of Fluvial Lakes in Middle Part of Elbe River and Upper Parts of Lužnice and Svratka River
Havlíková, Petra ; Janský, Bohumír (advisor) ; Pithart, David (referee) ; Pokorný, Jan (referee)
COMPARATIVE STUDY OF FLUVIAL LAKES IN FLOODPLAINS OF THE ELBE, LUŽNICE AND SVRATKA RIVERS Petra Havlíková ABSTRACT The aim of the thesis was to specify key differences in chemistry and biota (zooplankton communities) among fluvial lakes in three regions of Czech Republic: "střední Polabí" (central part of the Elbe River on the territory of Bohemia), "Horní Lužnice" (the upper part of the Lužnice River on the territory of Bohemia), and the Svratka River near Milovy (upper part of the Svratka River). The 10 studied lakes of the three regions differ in size, geology, shading, the influence of the river, and the level of anthropogenic impact. The following hypotheses were tested: 1) The chemical composition of the water in fluvial lakes is significantly different in different areas (floodplains). In the central Elbe River floodplain, there are the highest values of conductivity and concentrations of organic matter and nutrients. Fluvial lakes of the Svratka River floodplain near Milovy show the lowest level of these parameters, and fluvial lakes of the upper Lužnice River occur between the two previous regions. 2) The chemistry of fluvial lakes that have contact with the river through surface connection is significantly influenced by the river, and differs from the chemistry in fluvial lakes without any direct...
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The community of zooplankton in the pools in inundation area of Lužnice river
ŠEBESTA, Roman
This thesis aims to discuss generally the pools of river with a focus on the Upper Lužnice river maiinly on zooplankton communities, which ooccurs in these locations. Regular sampling of communities in different types of river pools better then identify their species and numerous changes during the year. Thesis deal with samplinng techniques and laboratory processing sampples of the zooplankton to.
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