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The second phase shifting I/9 Dubice - Dolni Libchava
Belda, Miroslav ; Jíra, Daniel (referee) ; Kosňovský, Michal (advisor)
Master's thesis will deal with the second phase of shifting I/9 Dubice - Dolni Libchava passing west of the Ceska Lipa with an approximate length of 3 km stretch. Estimated start-up of this section is in 2014. This project should build on in the future by-pass Ceska Lipa and Novy Bor, which is currently without funds for implementation by 2025. Traffic load after completion of the by-pass should be approximately 16500 vehicles / 24 hours in 2030. The section is designed in the category S 9.5 with optional solving two major intersections. This thesis will focus on reducing the cost of construction of the section.
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Liberec, Ruprechtická x Michelský Vrch
Kaňková, Kateřina ; Belda, Miroslav (referee) ; Smělý, Martin (advisor)
This diploma thesis presents various redesign scenarios of the intersection of Ruprechticka, Michelsky vrch and U Pramenu streets located in Liberec, Czech Republic. The work presented in this thesis is as answer to the current intersection arrangement that does not meet the requirements of a safe traffic crossroad due to its broad, unorganized spatial arrangement. Three redesign options are developed and proposed based on performed traffic volume counts, vehicular speed monitoring, and previous history of traffic accidents in this intersection. Implemented traffic calming measures include significant changes to the lane arrangement and width in the intersection. It is proposed that the U Pramenu street is converted to one-way street to further reduce the overall traffic volume travelling through the intersection. Moreover, all redesign scenarios and strategies focus on improving safety and comfort of pedestrians and persons with disabilities. Finally, a multiple-criteria decision analysis is carried out and the most viable redesign option is selected.
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New parameterizations in the RegCM model
Pitaš, Ondřej ; Belda, Michal (advisor) ; Karlický, Jan (referee)
This thesis compares new physical parameterizations in the regional climate model system RegCM with the standard settings used at the Department of Atmospheric Phy- sics and observed climatic conditions. The first part is dedicated to the description of individual parameterizations and to the essential introduction to the RegCM model. In addition, model preprocessing and running simulations are discussed. The simulations were conducted over Europe domain for the ten-year period (1990-1999) with five dif- ferent model settings. Holtslag PBL(Holtslag, 1990) type boundary layer scheme, Grell cumulus convention scheme over land and ocean and Explicit moisture scheme (SUBEX; Pal et al 2000) were used in the reference simulation. In the conducted simulations, the following physical parametrizations were used separately: UW PBL (Bretherton and McCaa, 2004) boundary layer scheme, Explicit moisture Nogherotto/Tompkins mois- ture scheme, Tiedtke (1996) and Kain-Fritsch (1990) & Kain (2004) cumulus convention schemes over land and ocean. None of the new physical parameterizations showed impro- vements over standard setting in all analyzed variables at the same time. Precipitation is best described by reference simulation as well as by simulations with UW PBL and Kain- Fritsch & Kain parametrization type. Kain-Fritsch...
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Climate classifications for the Czech Republic territory
Pešková, Andrea ; Žák, Michal (advisor) ; Belda, Michal (referee)
This bachelor's thesis discusses climate classification of the Czech Republic territory, providing an overview of the existing climate classifications used for the area. The concept of satellite data processing is presented, as an alternative approach to climate classification. Based on satellite data of net radiation, inco- ming solar radiation and fractional cloud cover, new climate classifications for the Czech Republic are created using a hierarchical clustering method. The results show that in all cases, the identified climate units primarily reflect the terrain and increasing continentality of climate in the southwest direction.
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Simulation of turbulence in the convective planetary boundary layer
Hostačný, Martin ; Fuka, Vladimír (advisor) ; Belda, Michal (referee)
Name: Simulation of turbulence in the convective planetary boundary layer Autor: Martin Hostačný Department: Department of atmospheric physics Supervisor: Mgr. Vladimír Fuka, Ph.D. Abstract: Airflow convection is simulated in four model cases using a Large Eddy Simulation (LES) model. The first case features flat heated surface which causes free convection into a neutrally- stratified atmosphere. The goal of simulating the first case is a comparison with reference Direct Numerical Simulation (DNS) data. The main aim is to compare the LES and DNS approaches to the numerical simulation of the problem. The second case consists of a stable convective boundary layer over a flat heated surface. The resulting simulation is a convective motion. The aim is to qualitatively judge the influence of the numerical grid density and the choice of the subgrid model on the convection. The third case is a convection over a flat heated surface which is divided into four equally large quadrants. Two of the quadrants have higher surface potential temperature flux and two have a lower one. The quadrants are arranged in a checkerboard manner. The aim is to observe differences between the simulations with different subgrid models and also to observe and identify trends and recurring airflow patterns caused by the surface...
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Model WRF and its application for regional climate modelling in high resolution
Karlický, Jan ; Halenka, Tomáš (advisor) ; Belda, Michal (referee)
This work is dealing with regional climate models. Firstly, their principle and use of them is described, including advantages and disadvantages of this approach. Further, the application of WRF numerical weather prediction model in climate mode is described and differences in use of CLWRF modification and its advantages for getting results are discussed. Possibilities of this implementation and testing runs for finding appropriate settings are presented. Finally, the results of one ten-year and four five-year simulations of model with different settings are compared with observed values. Some chapters are dedicated to possibilities of processing and graphics outputs of model results and discussion.
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Synoptic situations in Europe
Šubík, Štěpán ; Belda, Michal (advisor) ; Kučerová, Monika (referee)
OF THE BACHELOR THESIS Štěpán Šubík Synoptic situations in Europe Department of Atmospheric Physics Supervisor of the bachelor thesis: Mgr. Michal Belda, Ph.D. Advisor of the bachelor thesis: Mgr. Michal Žák, Ph.D. Study programme: Physics Study branch: General Physics Prague 2018 Title: Synoptic situations in Europe Author: Štěpán Šubík Department: Department of Atmospheric Physics Supervisor: Mgr. Michal Belda, Ph.D., Department of Atmospheric Physics Advisor: Mgr. Michal Žák, Ph.D., Department of Atmospheric Physics Abstract: This thesis is written to describe classifications of weather types, one of the methods applicable in Central and Western Europe. The main aim is to find an objective classification, which can be used as a help and support for different weather forecast models. The thesis is divided into three parts. The first part offers an information about the most used weather type classifications and their objective definitions. In the second part is a comparison of the objective classifications and their applicability in the area of Central and West Europe. In the third part, we used the classification selected in part two, the Lamb weather types, to classify the area in years 2011-2017. A relationship between the weather types and temperature was also studied above the...
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Atmospheric boundary layer representation in the high-resolution WRF model
Peštová, Zuzana ; Belda, Michal (advisor) ; Huszár, Peter (referee)
This diploma thesis deals with the comparison of the results of simulations of the numerical model WRF in the prediction mode for 9 schemes of boundary layer parameterization and in the climatic mode for 4 selected schemes. The first part of the work is devoted to the WRF model and especially its options for model physics with a focus on boundary layer schemes. The second part describes the experimental setup of the performed simulations. The third part then compares the obtained results for the prediction and climate mode with the measured data.
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Continentality representation in regional climate models
Hudek, Jakub ; Belda, Michal (advisor) ; Huszár, Peter (referee)
Continentality of climate is one of the basic climate phenomena, describing the climate at current place according to annual changes of basic meteorological elements such as temperature, precipitation, etc. Its measure is usually expressed by indices and is being determined either according to observations using collected data or simulated by climate models. The goal is usually to determine the ability of climate models to represent the present state of climate and to determine and analyse the scenarios of future evolvement for Europe as an examined area. In present diploma thesis are briefly introduced terms like continentality, its indices, global and regional climate models, the ERA-Interim reanalysis, as well as the EURO-CORDEX iniciative. Subsequently individual simulations are processed, analysed and compared with the observations according to the E-OBS dataset.
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