|
|
The influence of evapotranspiration on the groundwater of floodplain forests: Libický luh
Vašková, Hana ; Weiss, Tomáš (advisor) ; Slavík, Martin (referee)
The recherche part of this bachelor thesis deals with evapotranspiration from floodplain forests and its influence on the depth of the groundwater level and mineralization of groundwater. As floodplain forests in the Czech Republic are represented only in smaller fragments, there is a mention of the effect of mineralization on plants. The thesis describes the principle and use of stable isotopes in hydrogeology and the comprehensive characteristics of the area of interest of the experimental part, the Libický luh National Nature Reserve. The experimental part includes the observation of the level, conductivity, temperature, pH, and determination of the isotopic composition of the underground and surface water in Libický luh, where high mineralization of the groundwater was previously detected. The thesis discusses the effect of evapotranspiration on the content of dissolved substances in the water in Libický luh as a possible cause of this phenomenon. It was found that as the temperature rises, the groundwater level drops, and that mineralization remains relatively constant throughout the year. The drop in the groundwater level is evidently caused by intensive evapotranspiration from the floodplain forest during the growing season. However, longer time series of conductivity or hydrochemical...
|
|
|
Hydrogeological character of selected hardrock environments and groundwater recharge in populated areas
Krupař, Josef ; Bruthans, Jiří (advisor) ; Slavík, Martin (referee)
The purpose of this thesis is to adress the hydrogeology of hard-rock environment and groundwater recharge in urban areas. The theoretical part describes hydrogeology character of granite and ophiolite rock environment with emphasis on features such as transmissivity, storativity and hydraulic conductivity that corresponds to the fissuring of the rock environment. It is clear that fault tectonics is the most important factor that influence the hydraulic conductivity. Storativity, on the other hand, is most affected by fissured systems. Ophiolites are a more significant water supply aquifer than granites in terms of storativity. This thesis also describes groundwater recharge in urban areas and not only from precipitation but also through surface water reservoirs, leaks from pipeline network and by import of water from surrounding watershed. Practical part compares values of precipitation from 2013 to 2022 from four ČHMU stations. It compares PET (Potential evapotranspiration), API (antecendant precipitation index) values and their difference. Subsequently, in the practical part, the normalized relative groundwater recharge from the measured values of the well level is compared with the flow rate at all monitored locations and it is evaluated whether the time course of the recharge according to the...
|
|
|
Advances in applied research in the field of remediation of contaminated groundwater and industrial waste water
Kašparová, Johana ; Innemanová, Petra (advisor) ; Cajthaml, Tomáš (referee)
Water pollution is one of the most serious global problems in today's age. Contamination of water disrupts aquatic ecosystems and their surroundings. A major problem for people in some parts of the world is the decreasing availability of drinking water. In order to prevent further pollution, there are laws, mostly in developed countries, that try to protect water resources. Another procedure to reduce pollution is remediation methods. In the Czech Republic there are entities active in environmental protection deal with remediation technologies and inventories of contaminated sites such as state administration bodies, universities, academies of sciences and private entities. One of the projects that deals with research in the field of environmental damage removal is the "Environmental Research Center: Waste and Circular Economy and Environmental Safety" (No. SS02030008). A partial goal of the project is the inventory of available innovative solutions for contaminated sites for the needs of the state administration. As part of the solution of the submitted bachelor's thesis, the possibility of obtaining the necessary data from publicly available databases focused on applied research and development was verified. The theoretical part focuses on the general characteristics and protection of underground...
|
|
|
Surface and ground water of the Libický floodplain forest
Bašta Spinali, Izabela ; Weiss, Tomáš (advisor) ; Slavík, Martin (referee)
In the Quaternary, the area of the Libický floodplain forest was shaped mostly by the action of the Elbe river. The river generated a structure of oxbow lakes, pools, wetlands, floodplain forests or wet grasslands. These are connected by shallow groundwater of the Quaternary aquifer. During the Upper Cretaceous period, the area of Libický forest was flooded by the sea, which resulted in the formation of the bedrock of Libický forest - now the Cenomanian aquifer of the Poděbrady mineral spring structure. This aquifer is part of the Bohemian Cretaceous Basin. This thesis provides an overview about the waters in the area of the Libický forest, especially about: the development of the structures of surface water during the last ~2k years, groundwater of the quaternary aquifer and mineral water of the Poděbrady mineral spring structure. Finally, this thesis contextualizes this knowledge into climatic, geological, pedologic and also to ecological conditions of the area of Libický luh which is an important ecosystem in terms of biodiversity in otherwise relatively densely populated agricultural landscape. Key words: Libický luh, surface water, hydrology, Elbe, groundwater, hydrogeology, Cenomanian aquifer, Bohemian Cretaceous Basin, Poděbrady mineral spring structure, floodplain forest
|
|
| |
|
|
Approaches to estimate wetland evapotranspiration and the evapotranspiration loss of groundwater from wetlands in the Liběchovka and Pšovka catchments
Pátek, Karel ; Bruthans, Jiří (advisor) ; Slavík, Martin (referee)
This work is dedicated to the study of evapotranspiration in wetlands. The theoretical part is an overview of methods that are used for estimation of evapotranspiration, especially in the wetland environment. The practical part is focused on measurement of evapotranspiration in the wetlands located in the upper part of the Pšovka and Liběchovka river watersheds. Periodical fluctuations of water table and water flow in the stream were observed there due to evapotranspiration. The role of evapotranspiration was dependent on the mean daily temperature and sunshine duration. For the warm sunny days the fluctuations indicated that in the studied wetland the maximal daily evapotranspiration can cause 32 % decrease of water flow in the stream. The evapotranspiration derived from stream flow oscilation reached 86 % of potential evapotranspiration based on Oudin method. Potential evapotranspiration in the Liběchovka wetlands in summer is capable to decrease the discharge of Liběchovka in similar way as groundwater abstraction.
|
|
|
Geysers and their role in the groundwater regime
Pleskotová, Nikola ; Datel, Josef (advisor) ; Kubricht, Jiří (referee)
Geysers are unique and precious phenomenon in our planet. Especially hot geysers are originated only in localities where there are harmony of conditions, which are essential for their development. The main conditions are source of water, source of heat and unique system of rifts. Rifts bring the water to the chamber and vent ejects hot water to the surface. Most of cold geysers are drilled holes. Their vicinity are dappered by human, and they often look like fountains. In the introduciton of this bachelor thesis groundwater and it's movements and properties are presented. Additionally the rock environment and mineral water are covered. Geysers, the main topic of this thesis, are described as a seperate chapter. Different chapters explain how geysers work and other processes that accompany them.
|
|
|
Natural groundwater seeps
Hanušová, Martina ; Datel, Josef (advisor) ; Lipanský, Tomáš (referee)
The bachelor thesis is built so that all chapters themselves freely followed up. The main pillar of work is first chapter, which deals generally with springs. Next follows typology of springs, which deals with different types of springs according to geology, temperature, and yield. The special part about artesian water follows. Next section deals with karst springs and thermal springs, where I present examples from the Czech Republic. The chapter of thermal springs includes also text about geysers. In the last part the thesis deals with the Mělník area and Mělnická Vrutice. The aim of this study was to document this issue, which appears in the literature. The main result of the thesis is gathering information that appear in the foreign literature only in parts, and almost never in the Czech books and papers.
|
|
|
Interpretation and use of monitoring data from water supply wells
Kutnarová, Karolína ; Pastuszek, František (advisor) ; Hrkal, Zbyněk (referee)
The life of the hydrogeological well is not important only in petroleum geology but also in the water industry. Nowadays, when the demand of water rises, it is necessary to ensure the smooth running of the wells and care as much as possible about their condition. The aim of this thesis is try to apply the methods of production analysis commonly used in oil production in the oil industry for water supply wells. In the thesis I will focus on monitoring the productivity of the well with regard to increasing the hydraulic losses caused by clogging. iv
|
|
|
The issue of drugs in surface and ground waters
Šrot, Martin ; Hrkal, Zbyněk (advisor) ; Datel, Josef (referee)
The presented work deals with the state of research of medicinal substances in water formations of Czech Republic and in smaller ammount it deals with this issue abroad. It provides an overview of the most frequently occurring medicinal substances and methods for their detection and also describes the possible sources of pollution and impact of these substances on the environment. Keywords: ground water, surface water, drugs, contamination
|
guest ::
