Zbynek Hrkal

Zbynek Hrkal
Charles University in Prague | CUNI · Institute of Hydrogeology, Engineering Geology and Applied Geophysics

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22
Publications
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365
Citations

Publications

Publications (22)
Article
In harmony with requirements of Water Framework Directive the natural backgrounds of selected metals were established on the territory of Czech Republic. This paper is intended to provide characteristics and results of testing methods focused on quantification of the impacts of anthropogenic activities based on data of regional monitoring and their...
Article
Groundwater in the Benešov–Ústí aquifer system in the northwestern Bohemian Cretaceous basin has been intensely exploited since the twentieth century. Apart from providing drinking water, it contains the most extensive accumulation of thermal water in the country. However, excessive exploitation can result in temperature declines and changes in the...
Article
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Climatic instability during the late Pleistocene has been reflected in the pattern of groundwater recharge. This report summarizes palaeoclimate knowledge during the late Weichselian in Europe. During this period the majority of northern Europe was covered by thick ice sheets and permafrost, preventing aquifers from recharging. In contrast, souther...
Article
The geological view to the issue of impact climate change on water resources on the Earth is the main objective of the paper. The geological excursion into the past of the Earth clearly shows that the climate cannot be stabilized. The volume of water existing on the Earth is stable and has never changed. About 96% of countries have sufficient resou...
Article
The Bohemian Cretaceous Basin represents a complex hydrogeological system composed of several aqui-fers with very favourable hydrogeological properties. These aquifers have been exploited for many years. The sustainability of such resources might be guaranteed by well organised water management, which requires a detailed knowledge about the functio...
Article
Knowledge of the natural background content of metals is important, but can be difficult to establish because the concentrations of substances dissolved in ground waters vary considerably with time and space. The main objective of the paper is to assess the natural background of five selected elements: As, Al, Cd, Pb and Hg. Each of these elements,...
Article
Full-text available
This paper analyses groundwater resources use and management in the socio-economic context of the Amu Darya River Basin which covers a part of the following landlocked Central Asian countries: Afghanistan, Tajiki-stan, Turkmenistan and Uzbekistan. These agrarian nations for sustaining their vital agricultural productions started to use groundwater...
Article
Climate change in Central Europe is manifested by periods of drought during the summer months of years when there is a reduction in atmospheric precipitation and temporary accumulation of water in the form of snow during winter period. The shallow sub-surface aquifer in crystalline rocks is very vulnerable to this decline in rainfall. Monitoring an...
Article
s u m m a r y The study was carried out in the northern part of the Aquitaine Basin extending in Southwest France. The basin has been intensively exploited for various purposes for many years. Although the geological context is well known, there are still some gaps in the knowledge about the hydrogeochemical regime, ground-water average residence t...
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Our paper is intended to assess the long-term impact of acid atmospheric deposition on the chemistry of ground waters in the Krušné hory Mts., and to explore to what extent forest cover participates in the development of chemical composition of relevant waters. The study was based on the results of long-term monitoring and assessment of mass flow i...
Article
The mineral water at Borjomi has been bottled since the 19th century. Currently, the production comes from the regulated artesian flow of 11 boreholes. The total yield is about 540m3/day. The mineral water is of sodium, hydrogen carbonate and CO2 type with mineralization up to 7.5g/l and a temperature up to 40°C. Long-term observation has enabled t...
Article
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The Irtysh river basin all the way from river spring in China across Kazakhstan as far as the Russian part of Siberia is among the most ecologically endangered and affected regions on our planet. The study provides a summary of the historical reasons for anthropological interventions in this area, which began with the construction of plants of the...
Article
The acidification of surface and groundwaters is a long standing issue in the Czech Republic which culminated in the second half of the last century by mass extinction of forest cover in many mountainous regions. The total deposition of sulfur at that time was reaching as much as about 108 kg/ha/year. This resulted in a decrease of alkalinity in gr...
Article
The paper describes a methodology of extrapolation and conversion of detailed information on atmospheric deposition in small experimental catchments into regional scale. This method uses the GIS for interpretation of satellite imagery of vegetation cover CORINE and the Digital Elevation Model. The reliability of presentation of the achieved results...
Article
Tendencies in water regime resulting from land-use change represent an important subject for research and in the region of the so called Black Triangle at the borders of Czech Republic, Germany and Poland an urgent practical problem. Particularly extensive deforestation in Czech mountain regions caused by acid rains, which appeared in the seventies...
Article
Tendencies in water regime resulting from land-use change represent an important subject for research and in the region of so called Black Triangle at the borders of Czech Republic, Germany and Poland urgent practical problem. Namely extensive deforestation in Czech hilly basins induced by acid rains, which appeared in seventies and eighties, requi...
Article
The Police basin forms the north-eastern extremity of the Bohemian Cretaceous basin. It is situated in the north-eastern part of Bohemia, close to the Czech-Polish frontier. A three-year hydrogeologic project "Optimisation of groundwater development and protection in view of other environmental components: The Police basin" was supported by the Min...
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Full-text available
The north-eastern Kazakhstan is one of the largest high-grade base metal deposits world-wide. Long-term mining operations and processing of local ores has inflicted huge damage on the environment, which has resulted in extremely high concentrations of heavy metals in surface and groundwaters. The city of Ust Kamenogorsk is fully supplied with potab...
Article
The area of the Jizerské Mountains in the northern part of the Czech Republic is known to have suffered from heavy acid atmospheric deposition which has led to mass extinction of the forest cover in apical parts of the mountains and to degradation of groundwater quality. A methodology for construction of groundwater vulnerability maps, using a Geog...
Article
The quality of groundwater often represents a limiting factor for its exploitation. The chemical composition of groundwater is a very complicated process involving geochemical, hydrochemical, and biochemical interaction between the water and the rock with which it is in contact. In addition, as a result of human activity, the deterioration of groun...

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