National Repository of Grey Literature 52 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Managed artificial recharge as a tool to eliminate negative impacts of climate change.
Kvašňovský, Tomáš ; Hrkal, Zbyněk (advisor) ; Rozman, David (referee)
: The topic of artificial recharge technology for water supply into the underground, its direct use and application in the field is becoming a more frequent foreign question, but also in the Czech Republic. This is due to the negative trend in groundwater levels over the past 10 years, caused by drought and temperature regression trends. The theoretical part of this thesis presents the knowledge of the use of artificial groundwater recharge, even with specific cases in the world or in the Czech Republic. This work is especially focused on a very specific case of the construction that represent underground dam in the village of Meziboří in the environment of the Czech massif "hard rocks". Specifically, its efficiency and impact on natural groundwater runoff. For this purpose, a numerical model was developed in the program Groundwater Vistas (extension for MODFLOW). From the results we can observe the influence of natural groundwater regime in both static and dynamic model. After simulating the dam in a steady- state regime of unaffected conditions, the groundwater level in the model before the dam increased significantly above ground level. The possible pumping without drying the collector then represents values 5,4 - 5,8 m3 /day (0,063 - 0,067 l/s) from the well just before the dam. The drain...
Assessment of drugs elimination in the treatment of drinking water by artificial recharge
Chupík, Jan ; Hrkal, Zbyněk (advisor) ; Eckhardt, Pavel (referee)
The Káraný waterworks supplies drinking water to approximately one third of its total consumption in Prague. It uses two main ways to produce drinking water: artificial infiltration and bank infiltration. Two-year monitoring of the content of 90 drugs and metabolites evaluates the occurrence of these substances in the Jizera River and in both production processes. The results of the monitoring point to a systematic occurrence of drugs in the Jizera River under Mladá Boleslav in concentrations ranging from tens of ng / l to hundreds of ng / l (Acesulfan and Oxypurinol). Artificial infiltration failed to remove six drugs from water (Primidon, Sulfamethaxxazole, Carbamazepine, Lamotrigine, Ibuprofen, Gabapentin, Acesulfan and Oxypurinol). Only four drugs (Ibuprofen, Caffeine, Oxypurinol and Acesulfan) were found in the results of monitoring from bank infiltration. This makes bank infiltration a more effective method of drug elimination than artificial infiltration. Keywords: drugs, drinking water, statistical analysis, monitoring
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
Individual groundwater supply in hard rocks - factors affecting yield
Kvíz, Jan ; Hrkal, Zbyněk (advisor) ; Datel, Josef (referee)
The aim of the bachelor thesis is to characterize the natural groundwater resources in the crystallin massif, forming ¾ of the Czech Republic. In the form of research, it summarizes the knowledge of this issue regarding the nature-science and socio-economic context. The introduction of the thesis describes the specific environment of hard-rocks and the factors affecting the yield of sources. It focuses on the region of the Czech Republic. In the following part, the thesis describes the individual groundwater supply in the Czech Republic. Is summarizes the Czech legislation of this issue, the development of the individual water supply and also his negatives. The thesis then focuses on some of the examples of the exploitation of groundwater resources in India, which is one of the most active theoretical and practical innovators in the field of exploiting the region of hard rocks.
Relations of the carbon dioxide occurrence and geologic conditions of the Cheb basin
Pavlát, Jan ; Datel, Josef (advisor) ; Hrkal, Zbyněk (referee)
This bachelor thesis describes the area of the Cheb basin which is situated in the Western Bohemia, and shows the geological, tectonic, hydrogeological structure of this area. The main feature of the bachelor thesis is a CO2 emission in the Cheb basin, near the village Dolní Částkov but it also describes the occurrence of mineral waters in the vicinity of the chosen lokality. Furthermore, the bachelor thesis deals with the emanation of gases in groundwaters. The bachelor thesis describes the properties and occurrence of CO2. At the end of the bachelor thesis, there are results of my measurements in a regular network of points with a device Meopta DI-2 654-03, which serves for an air sampling and measures the concentration of CO2 expressed in percentages. Key words: carbon dioxide, the Cheb basin, geological conditions, mineral water
Artificial recharge of groundwater resources
Drmota, Adam ; Datel, Josef (advisor) ; Hrkal, Zbyněk (referee)
This thesis addresses artificial replenishment of groundwater resources, commonly known as artificial recharge. The idea of artificial replenishment of groundwater lies in man-induced transfer of surface water to underground aquifers. The introduction highlights the reasons that led humans to artificially replenish groundwater. In addition, individual methods of surface, subsurface and induced infiltration are described. A special chapter was devoted to natural factors limiting the use of these methods. The thesis also includes studies of three concrete examples of projects of artificial recharge into groundwater by various techniques, each time with a different intention. Specifically, it describes resisting the intrusion of salt water into the Delta Llobregat aquifer in Spain, using the appropriate geological structure as a reservoir of potable water for the drought in South Florida, and the use of artificial infiltration basins and bank infiltration for water use in Káraný, Czech Republic.

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