National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Groundwater flow and highly permeable zones in aquifers of eastern part of Bohemian Cretaceous Basin based on Litá area and surroundings
Lachman, Vladimír ; Bruthans, Jiří (advisor) ; Vysoká, Helena (referee)
7 Abstract Groundwater flow and highly permeable zones in aquifers of eastern part of Bohemian Cretaceous Basin based on Litá area and surroundings In my thesis I deal with the character of highy permeable zones in marlstones and calcitic sandstones in east-bohemian synclines of the Czech Cretaceous Basin. My chosen area lies southwest of Nové M�sto nad Metují and within it lies Litá area, an important source of groundwater for Hradec Králové region. Groundwater in the area was contaminated in the 80's by chlorinated hydrocarbons. Based on a detailed field sampling of 23 boreholes and 4 sites of surface water performed in 2008 and on archival data on contaminant concentrations, I evaluate the character and relationships of groundwater from the boreholes. I grouped boreholes according to their chemical properties. In the second part of my thesis, I perform the analysis of the influence of faults on groundwater flow in a larger area of east-bohemian synclines. Results show that most yielding boreholes lie between fractures, not near them, which suggests the impermeable role of fractures. From available information I then try to answer the question of highly permeable zones of preferential groundwater flow. Based on the observed flow velocity,...
Estimation of Migration Parameters of Rocks with Fracture Permeability using Fluorescent Solutions : Research Report considering Work Progress and Results Achieved in 2013 Intermediate Report Covering the I. Phase : bibliography and preparatory works
Lachman, V. ; Kovářová, R. ; Novák, P. ; Rohovec, Jan ; Vašíček, R. ; Frydrych, V. ; Patzelt, Z. ; Šigut, R. ; Vachudová, L. ; Durajová, M. ; Koděrová, K.
The proposed project focusing on the use of fluorescent properties during tracer tests reflects the absecne of tracer substances not modifying the hydrochemical properties of the environment and not being radioactive. A positive result of the proposed research will enable more accurate evalutation of absorption properties of the rock environment in case of leakage of hazardous substances than it is for chemical tracers. Fluorescence salts offer the possibility of continuous monitoring of fluorescence changes without endangering the environment and without negative effects on hydrochemistry. Research will proceed according the fillowith scheme: bibliography-laboratory research-field tests-mathematical modeling. The project proposer has already acquired a patent and design rights in the frame of previous research project concerning the developed facility and technology enabling continuous monitoring and evaluation of fluorescence changes in liquids. The investigation of interaction between fluorescent salts and migratory pproperties of the rock environment will focus on rock with fracture permeability. Further selection of fluorescence salts accomplishing the objectives of the project will be based on the detailed bibliographic study. Particular fluorescent salts will be investigated in laboratory scale on selected rocs. Most promising fluorescence solutions will be consequently used for migration tests in specified rock environment with fracture permeability. The research polygon will be equipped with small-diameter boreholes interconnected by fracture network with two network section - with and without sorption properties. The results of both, laboratory and field tests, will be validated by mathematical models.

See also: similar author names
1 Lachman, V.
1 Lachman, Vladimír
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