National Repository of Grey Literature 23 records found  beginprevious13 - 22next  jump to record: Search took 0.00 seconds. 
Bathymetry on the small water reservoir Velky rybnik in the basin of the Litovicko - Sarecky stream
Zvonárová, Eva ; Bašta, Petr (advisor) ; Hradilek, Václav (referee)
The most important part is to perform measurements of selected water reservoirs in Litovicky - Sarecky stream. Selected small water reservoir is Velky rybnik, also called Dolejšak. The measurements were performed RiverSurveyor M9 device, and data were processed using the ESRI ArcGIS Desktop to a digital model of the terrain relief, which evaluates the clogging reservoirs in different places. This clogging is life threatening in the reservoir, but also around the water reservoir. The theoretical part contains the theme of small water reservoirs, their division and various applications. Then describes the methods of bathymetry, digital terrain relief model and interpolation and its methods. The methodology of bachelor thesis is processed measuring and finally in the results evaluated throughout the measurement. At the end of the work is the discussion and conclusion which will propose solutions to this problem.
Bathymetry of the small water reservoir Basta in Litovicko-Sarecky potok river basin
Černý, Jan ; Bašta, Petr (advisor) ; Pavlásek, Jiří (referee)
The work is focused on creating bathymetry maps of small reservoir Basta using the multi-beam echosounder Hydrosurveyor, performed in March and December 2015. The result was a benchmark of digital terrain models (DTM), of which determined the difference between depths and calculated the total accumulations of small reservoir. Another part of the work is based on the comparison of interpolation methods IDW interpolation, Natural neighbor and Topo to Raster created in ArcGIS. Furthermore, there is explained contemporary methods used in modern bathymetry. Map outputs in the form of grids generated by interpolation methods are interpreted and included in the content of work.
Bathymetry of the small pond Dzban in Litovicko-Sarecky potok river basin
Linhart, Matěj ; Bašta, Petr (advisor) ; Pavlásek, Jiří (referee)
This bachelor thesis is about bathymetry measurement of small water reservoir Džbán in Litovicko-Šárecký river basin with ADCP based instrument RiverSurveyor M9. There is included digital model terrain proceeding of bottom of reservoir and water storage cacculation. In theory it is described basic notions connected with this subject as a definition of small water reservoir, their dividing, sedimentation and functional objects. Below it is fundamentals of bathymetry and interpolation techniques. Then description of reservoir area, functional objects and methodology which was used to getting final results.
Floods in history of Starý Plzenec
Šalomounová, Simona ; Vokoun, Martin (advisor) ; Bašta, Petr (referee)
This work focuses on the occurrence of historical flood situations on the Vltava, Berounka and Úslava rivers. In case of the Úslava river, the specific hydrometric profile is Pilsen Koterov. The aim is to summarize these flood events, to trace them back in town chronicles and to process data from the Czech Hydrometeorological Institute. The completed processing of data from the Czech Hydrometeorological Institute has revealed the occurrence of flood situations in this area in particular months and seasons.
Atmospheric frontal passages over Prague
Obdržálková, Eliška ; Vokoun, Martin (advisor) ; Bašta, Petr (referee)
This bachelor thesis deals with migration statistics atmospheric fronts over the meteorological station Praha - Ruzyně. The first part explains the mechanism of this atmospheric phenomenon, including the primary research about the North Atlantic Oscillation that could have an impact on the atmospheric front. The aim of the thesis is processing of basic statistical characteristics of time series of atmospheric fronts crossing the Prague Area in the years 1950-2015, using different statistical methods. The conclusions can be found in the second part of the thesis. The main focus is on updating the statistical processing of the transition of atmospheric fronts across Prague. For this purpose records from 1950 to 2015 were used. The actual statistics were compared with the statistics reported by the Czech Hydrometeorological Institute, which includes only the atmospheric fronts from the period 1950 to 1999. Furthermore, the thesis deals with statistical data of atmospheric transition front via Prague depending on the direction from which they come and the index value of the North Atlantic Oscillation (NAO). These statistics could be used to replace the already mentioned statistics of Czech Hydrometeorological Institue and can be used as a basis for further exploration of this issue. The Microsoft Office Excel 2007 was used to draw line and bar graphs. The Rosette graphs showing the relationship front, depending on the direction of where they come from were created using statistical program R.
Historical times of plague - associated with climate
Suchardová, Kateřina ; Soukupová, Jana (advisor) ; Bašta, Petr (referee)
This bachelor thesis is concerned with occurrence of historical plague epidemics and their connection primarily with the origins and progress in the course of climate change. First part of the thesis is a summary of general information about the plague as a term and as a disease. Next part is briefly concerned with the vastest presence of the plague in Europe, predominantly in Bohemia and Moravia. Last but one section focuses on the plague in connection with not only climate changes but also with short-term weather conditions. In conclusion of the work is involved personal adaptation of historical weather conditions within the plague period in Bohemia and Moravia as well as a perspective on reciprocal link between these conditions during these years.
Climatic Changes After The Eruption of Tambora in 1815
Zhao, Shuran ; Soukupová, Jana (advisor) ; Bašta, Petr (referee)
Volcanic activities belongs to the most common natural events on this planet. They are as old as our planet. Some volcanoes have very long life cycle, their interval of eruptions can be up to tens or hundreds of thousands years. In general, the long interval the large eruption. The super-eruptions on VEI 8 are able to destroy the whole human civilization on the world. Fortunately this kind of eruptions is very rare from the human perspective. Other weaker eruptions happen more frequently. Human civilization experienced an eruption of VEI 7 in 1815, which was the biggest eruption during last 10 000 years and led to global cooling and famine. That was the biggest volcanic eruption in human history, eruption of volcano Tambora in 1815. Tambora during its eruption released a tremendous amount of magma and volcanic gases. It has been unsurpassed till now. It had severe consequences, many people were killed by the eruption but even more people died as a result of diseases or starvation related to eruption. In next 2 to 3 years after eruption, Northern Hemisphere was in an unstable condition. A huge amount of volcanic gases and ash released by this eruption was transported into stratosphere that led to global cooling. Just the cooling destroyed many fields and killed lots of people. So that year 1816 get a name as year without summer. In my work I collected information and data of weather during 1815 to 1817 around Northern Hemisphere to compare them and to find out whether the eruption changed the climate after 1815. Many sources recorded an unusual weather in North America, Asia and Europe. In these years, it was always cloudy and persistently rained. The Czech lands were also affected by this eruption. Many Czech sources recorded cold weather in 1815-1817 that related with widespread rise in price of agricultural products. It undoubtedly worsened the already grave situation. Such these eruptions are big threat to human civilization. We cannot avoid them, but we can reduce the consequences to a minimum by monitoring volcanoes and their activities. The aim of this work is describe the climatic changes accompanied with the big volcanic eruption of 1815 and its consequences. I am trying to restoring the details of volcanic eruption. My aim is to draw attention to the danger of volcanic activity and the importance of monitoring volcanoes.
Bathymetry of the small water reservoir Kalý rybník in Litovicko-Šárecký brook basin
Burda, Jan ; Hradilek, Václav (advisor) ; Bašta, Petr (referee)
This thesis deals with a measure bathymetry small water reservoirs Kala in the basin of Litovicko-Šárecký brook using a measuring instrument RiverSurveyor M9, and evaluation of measured depths in the form of a digital terrain model of the reservoir floor and the determine the accumulation of the small water reservoir. The theoretical part deals with small water reservoirs in general, ways of clogging and bathymetry. It also describes the location of interest small water reservoir Kala. There are also describes the interpolation methods and a digital terrain model. Included are basic information about the measuring instrument RiverSurveyor M9, which were measured. In the practical part describes the procedure for measuring of the reservoir floor. Furthermore, it is processed by a digital terrain model, including an evaluation of reservoir accumulation. For the creation of a digital terrain model is used several interpolation methods, which are then compared to each other. Among the comparison methods include IDW, Kriging, Topo to Raster, Spline, and Natural Neighbourhood Trend. Have proven IDW method that achieves the best results.
Using of GIS in hydrology
Svačinová, Michaela ; Bašta, Petr (advisor) ; Máca, Petr (referee)
This bachelors thesi deals with usage of geographic information systems (GIS) in hydrology. In this work are described specific hydrologic analyses, which are based on the digital terrain model (DTM). Work introduced individual flow direction algorithms, its usage is necessary part of every GIS software including hydrological tools. There are described individual commercial and non-commercial GIS softwares used in hydrological. In practical part Arc Hydro (ArcGIS extensit) and SAGA GIS software are used for creating hydrological analyses in Jedlová broog watershed (Liberec region) with usage of DTM of fifth generation and terrain topology. Arc Hydro and SAGA GIS softwares are compared on base of their graphical user interface (GUI) and generated results.
Development of a tool for digital terrain analysis
Rapoport, Daria ; Barták, Vojtěch (advisor) ; Bašta, Petr (referee)
Component of many hydrological applications using digital terrain models is the calculation of flow accumulation and specific catchment area, which are broadly used conceptions in hydrological modelling. The goal of this diploma thesis was a proposal of tools for calculation of flow accumulation and specific catchment area by Multiple Flow Direction (MFD) algorithm as more appropriate for many hydrological applications then Single Flow Direction algorithm built-in in ArcGIS. The toolset should serve as an educational and research tool at the Faculty of Environmental Sciences, CULS, but not only there. The theoretical part of the thesis gives examples of digital terrain models applications in general and in hydrology, summarizes basic methods that define flow direction and flow accumulation of surface runoff in grid-based terrain models and their significance for hydrological modelling. Selected methods and their implementations are described in details in methodological part of the thesis. The tools were created in Python language and may be used in ArcGIS interface. The functionality of the toolset was tested on a coarse-resolution hydrologically correct digital terrain model of basin Moravian Dyje and simulation results has been extensively compared to those produced by Single Flow direction algorithm. It is suggested that created toolset would be developed further in direction of calculation of additional related terrain attributes (e.g.Topographic Wetness Index), river network extraction with MFD, dealing with flat and sink areas in input DEM, and other flow direction algorithms implementation.

National Repository of Grey Literature : 23 records found   beginprevious13 - 22next  jump to record:
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