National Repository of Grey Literature 19 records found  previous11 - 19  jump to record: Search took 0.01 seconds. 
The design of irrigation of the sport area with the use of local groundwater sources
Mikulica, Tomáš ; Julínek, Tomáš (referee) ; Říha, Jaromír (advisor)
This graduation thesis deals with the design of irrigation of the sport area with the use of local groundwater sources. The main part of the thesis is devoted to evaluating of capacity existing water well, practice the exploratory drilling and the hydrodynamic tests. The integral part of the thesis is technical proposal of irrigation device in the specific sport area.
Reliability analysis of embankment dams endangered by filtration deformations
Čejda, Marek ; Baroková,, Dana (referee) ; Fošumpaur, Pavel (referee) ; Říha, Jaromír (advisor)
Subject of the dissertation is a probability analysis on creation of embankment subsoil filtration deformations. Out of the broad topic of filtration deformations, the dissertation is focused at initiation of the process. At this phase, the overlying layers downstream of levee get uplifted, and eventually get breached. The process of downstream subsoil failure probability estimation is formulated using mathematical and statistical modelling. Within the scope of parametrical study the suggested method is applied onto a test environment. Results of the probability estimation are compared with results obtained using Limit state design method. The results of stochastic modelling can be used for improvement of Limit state design method precision.
Mathematical model of groundwater flow during operation of a circulation well
Žáková, Tereza ; Mls, Jiří (advisor) ; Šindelář, Jakub (referee)
In this master's thesis, a numerical model of groundwater flow in a contaminated area of Hradec Králové was created. After that, a circulation well was introduced. Two circulation well variants, which differ in the amount of pumped water, were examined. All simulations were performed with the aid of a finite element solver Feflow 5.2. The values of hydraulic head resulting from the mathematical model are in a good agreement with those obtained from the field measurement. The groundwater flow present in the area of interest exhibits south to southwest direction. After introducing the circulation well, I focused on the influence of the amount of pumped water on the groundwater flow. The outcome of this observation was that during the higher volume pumping, the circulation cell is larger and therefore has a higher influence on the groundwater flow. I evaluated that it is more efficient to pump a higher amount of water in the investigated area.
Circulation wells and their mathematical modelling
Nedvěd, Jakub ; Mls, Jiří (advisor) ; Šantrůček, Jaromír (referee)
Groundwater is our priceless natural resource and it is our duty to protect it and to take care of its quality. That is the reason why several techniques of pollution removal have been developed; the Groundwater Circulation Well technique (GCW) is one of them. This system enables us to clean contaminated groundwater effectively and in-situ (it means that there is no need to extract groundwater to the surface). This thesis is aimed at collecting and presenting our actual knowledge of the most common GCW systems. In the first part of the thesis the basic kinds of the GCW are introduced and their principles are presented. The remediation mechanisms are further described with respect to the character of the particular contamination. The chemical and biological processes controlling the contaminant degradation are described. Several experiments that were carried out and monitored in order to study the efficiency of GCWs are presented. In the last part of the thesis the mathematical modelling of GCWs is introduced. The partial differential equations governing the processes of flow and mass transport in the well surrounding parts of aquifers are presented and the corresponding initial and boundary conditions are formulated. The obtained numerical results and conclusions of their comparison with measured data are...
Numerical modeling in groundwater contamination problems
Havlíková, Barbora ; Datel, Josef (advisor) ; Mls, Jiří (referee)
This bachelor thesis deals with numerical modelling of groundwater flow and contaminant transport. This thesis consists of two parts. In the first part are briefly described and compared basic methods, which are used for solving problems of groundwater flow and substance transport. Further more are set up initial and boundary conditions, which are an essential part of the compilation model. The second part deals with models from location Bzenec, where was the leakage of chlorinated aliphatic hydrocarbons. Models were created in purpose to describe the extent of contamination and spreading of contaminants and also to predict the further development of the pollution.
Isotope hydrogeology and geothermal applications to clarify the origin, the sustainability and the character of groundwater flow: Bohemian and Aquitaine sedimentary basins
Jiráková, Hana ; Hrkal, Zbyněk (advisor) ; Rapantová, Naďa (referee) ; Michelot, Jean-Luc (referee)
Isotopic investigations combined with geothermal applications represent powerful tools for the exploration of groundwater potential as a drinking or geothermal resource. This Ph.D. Thesis combines both approaches, environmental and radioactive isotopes together with temperature data in deep aquifers, in order to enrich and update the knowledge concerning the aquifer recharge processes in the Aquitaine Basin (France) and the aquifer recharge processes and geothermal potential in the Bohemian Cretaceous Basin (Czech Republic). Stable isotopes (18 O, 2 H, 13 C) combined with radioisotope data (14 C, 3 H) are used to estimate the recharge timing and climatic conditions prevailing during the infiltration from the Late Pleistocene up to modern time. The character of groundwater recharge and regime are necessary to generate relevant source data for the accurate modelling of complex groundwater systems. Three groups of groundwater recharge types can be distinguished throughout Europe - (i) continuous recharge and (ii) interrupted recharge during Last Glacial Maximum and (iii) a group corresponding to particular recharge conditions. The contrasted geographic and climate conditions at both study sites in France and the Czech Republic have entailed a great heterogeneity of the recharge conditions and...
Zákonitosti interakce systému "voda-hornina-krajina" a jejich využití při ochraně podzemních vod
Český hydrometeorologický ústav, Praha ; Výzkumný ústav vodohospodářský T. G. Masaryka, v.v.i., Praha ; VŠB - TU, Fakulta hornicko-geologická, Institut geologického inženýrství, Ostrava ; Česká geologická služba, Praha
Obsahuje zprávy a výsledky dílčích projektů: Stanovení hydrologické bilance na příkladu povodí Bečvy a Bělé (Jan Unucka), Metodika stanovení prahových hodnot pro podzemní vodu v interakci s povrchovou vodou (Marie Kozlová), Metodika stanovení režimů podzemních vod pro jednotlivé hydrogeologické rajony/útvary podzemních vod ČR (Marie Kozlová, Hana Prchalová) a Návrh metodik stanovení přírodních zdrojů, podzemních vod z průtoků povrchových toků.
Aktualizace a upřesnění modelového řešení oběhu podzemní vody v hraničním území Polska a České republiky: Vnitrosudetská deprese. Oblast Kudowa zdrój - Police - Adršpach - Mierozsów
Progeo s.r.o., Praha ; Chaloupková, Marie ; Šouta, Miroslav ; Milický, Martin ; Baier, Jan ; Uhlík, Jan
Zpráva hodnotí a dokumentuje vývoj časových řad hladin podzemních vod, průtoků, odběrů a klimatických dat ve vztahu k zásobám a poměrům proudění podzemní vody v příhraničním území České republiky a Polska náležejícího do hydrogeologického celku vnitorsudetské pánve. Vstupní data modelového řešení: hladiny podzemních vod, klimatická data, průtoky, odběry podzemních vod. Modelové řešení proudění podzemní vody.
Vývoj metodiky identifikace a matematického modelování proudění a geochemické interakce v rozpukaném prostředí kompaktních hornin: Etapová zpráva Programu státní podpory výzkumu a vývoje MŽP za rok 2003
Česká geologická služba, Praha ; Drábek, M. ; Bláha, V. ; Breiter, K. ; Gabašová, A. ; Havíř, J. ; Kovář, L. ; Vohralík, M. ; Maryška, J. ; Severýn, O. ; Pačes, T. ; Rukavičková, L.
Cílem projektu je vývoj komplexní metodiky zjišťování a parametrického vyjádření proudění podzemní vody a geochemické interakce v puklinovém prostředí Českého masivu. Metodika zahrnuje metody terénního a laboratorního výzkumu a matematické modelování. Hlavní oblasti plánovaného výzkumu jsou 1. Terénní hydrodynamické a interferenční testy na výzkumných vrtech hlubokých cca 300 m. 2. Stanovení hydraulických, geologických a geochemických vlastností rozpukaných kompaktních hornin a podzemní vody na základě syntézy a analýzy výsledků terénních a laboratorních výzkumů. 3. Matematické modelování proudění a transportu v ucelené hydrogeologické struktuře puklinového prostředí granitového masivu s dvojí pórovitostí, s využitím výsledků terénního a laboratorního výzkumu.

National Repository of Grey Literature : 19 records found   previous11 - 19  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.