National Repository of Grey Literature 41 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Short-term rainfall for hydrological modeling and design of small water management structures in the landscape
Kavka, P. ; Müller, Miloslav ; Strouhal, L. ; Kašpar, Marek ; Bližňák, Vojtěch ; Landa, M. ; Weyskrabová, L. ; Pavel, M. ; Dostál, T.
The aim of this methodology is to reduce the current knowledge deficit in the field of short-term rainfall variability and its application in hydrological modeling and design of small water structures and conservation measures within the catchment. The methodology defines six generalized short-term rainfall scenarios with specific temporal distribution of rainfall intensity. Next their variability related to their occurence frequency and spatial distribution accross Czech Republic is presented. These scenarios were derived from the 10-years time series of radar rainfall measurements adjusted with the daily totals from ground gauging network.
Climate extremes in teaching geography
Nováková, Barbora ; Matějček, Tomáš (advisor) ; Müller, Miloslav (referee)
The diploma thesis deals with climatic extremes and its position in education from students' and teachers' point of view, textbooks and curriculum documents. The introductory part describes the basic characteristics of climatic extremes using specialized literature. The key part of the thesis is research combining quantitative and qualitative methods. The main framework of the thesis is quantitative research, which aims to find out, by means of a questionnaire survey, what are the attitudes of students towards the topic of climatic extremes. Based on the questionnaire survey, it is further evaluated with which preconceptions students come into education. A model lesson based on a constructivist model of teaching, specifically using the E-R-R (evocation - realization - reflection) method, was designed to monitor students' responses. After experimental education, students filled in the questionnaires for the second time, and the last filling took place several weeks later. Repeated questionnaires allowed tracking changes in students' responses and observing the impact of education. Part of the thesis is qualitative research which includes interviews with teachers of geography, analysis of textbooks and curriculum documents. The results show that students come into the education with some knowledge of...
Extreme precipitation events in Macaronesia
Kloubová, Martina ; Müller, Miloslav (advisor) ; Huth, Radan (referee)
Extreme precipitation events in Macaronesia Abstract The thesis is dedicated to extreme precipitation events in Macaronesia, an area in the Eastern Atlantic that includes the Azores, Madeira, Canary and Cape Verde Islands. An extensive physical-geographic characteristic of the region is followed by the analysis of daily rainfall data from the period 1977-2016, based on 16 stations. Data quality fluctuates, whereas data from the Canary Islands proved to be the most reliable. To evaluate the extremity of precipitation, their one-day to three-day sums are expressed using return periods, each archipelago then obtains an overview of 20 events with the largest extremity via geometric means of the return periods. The temporal and spatial variability of the events is solved by direction vector method. In all the archipelagoes, the cases of extreme precipitation are concentrated in the humid part of the year, but at varying intensities. The highest concentration of the events is reported in Cape Verde (in September), whereas the smallest one belongs to Azores and Madeira, with one-day extremes even in the warmer part of the year. An increase in the number of events during the studied period has only been reported in Cape Verde. Extreme events usually hit only one of the Macaronesian archipelagoes. Finally, a basic...
Extreme precipitation in low mountain ranges in Central Europe: a comparative study between the Vosges and the Ore mountains
Minářová, Jana ; Müller, Miloslav (advisor) ; Žák, Michal (referee) ; Caumont, Olivier (referee)
of the doctoral dissertation Extreme precipitation is related to flooding which is one of the most frequent natural hazards in Central Europe. Detailed understanding of extreme precipitation is the precondition for an efficient risk management and more precise projections of precipitation, which include uncertainties, especially at regional scale. The thesis focuses on extreme precipitation in the Ore Mountains (OM) and the Vosges Mountains (VG); two low mountain ranges in Central Europe experiencing orographic effect on precipitation. Based on state of the art about precipitation in OM and VG, a currently missing analysis of the temporal distribution of precipitation in VG was needed prior to the analysis of extremes. The original dataset of daily precipitation totals from 14 weather stations used in the initial study was extended to 168 stations covering a broader area of VG. The study of temporal distribution of precipitation during 1960-2013 led to a classification of stations: (i) mountainous stations with winter maxima and highest mean annual totals due to orographic enhancement of precipitation, (ii) stations on leeward slopes with two maxima (summer and winter), (iii) lee side stations with summer maxima and lowest mean annual totals due to rain shadow and more continental character, and...
Abrupt day-to-day drops in air temperature and their seasonal distribution
Čašek, Matěj ; Müller, Miloslav (advisor) ; Křížová, Milada (referee)
The submitted thesis is focused on abrupt day-to-day air temperature drops. The theoretical part describes the meteorological and physical-geographical factors which influence air temperature. Abrupt air temperature drops were ascertained by daily data of maximum, minimum and mean air temperature in order to detect their potentional varying seasonalities. In thesis were used data from Praha-Ruzyně station between 1st January and 31st December. The results indicate that the interdiurnal air temperature drops vary in each temperature characteristics. While daily maximum air temperatures exhibit the greatest rates of decrease in summer months (July - August), the greatest drops of daily minimum air temperatures occur exclusively in December and January. Significant abnormality was ascertained during abrupt cooling at the turn of the years 1978 and 1979, when abrupt temperature drop was detect in both maximum and minimum air temperature. The seasonality of interdiurnal mean air temperature drops exhibit changes of both daily maximum and minimum air temperature. In thesis is also discussed the unsuitability of specification of intrdiurnal air tepmerature changes based on daily mean air temperature. Key words: temperature drop, cold front, radiation cooling, interdiurnal change
Radar-based summer precipitation climatology with respect to orography in the Czech Republic
Bližňák, Vojtěch ; Müller, Miloslav ; Kašpar, Marek
The aim of this work is climatological analysis of 10-year series of summer precipitation derived from radar and precipitation\nmeasurements in high spatial and temporal resolution. The definition of the summer season is related to the fact that\nthis part of the year represents the most humid period with the most probable occurrence of extreme rainfall events.\nParticular attention is paid to spatial distribution of average seasonal and maximum 30 min - 24 h\ntotal precipitation in the middle and mountainous locations. Part of the study is also the characteristic of daytime precipitation with respect\non the Czech Republic (Czech Republic).\nDespite the relatively short period of 10 summer seasons, the present work provides new and more detailed knowledge\nthe spatial and temporal distribution of the mean and maximum sums of summer precipitation. Within climatological analysis\nis used glide sums of precipitation that are better able to capture absolute maxima in time series,\nwhich gives room for more precise calculation of frequency of occurrence, respectively. N-year rainfall sums in sub-days\nscale. Calculated climatological characteristics will be further refined in the future with prolonged time\nmeasurement.
Effects of orography on spatial distribution of convective precipitation in Banská Bystrica district (Slovakia)
Kvak, Róbert ; Müller, Miloslav (advisor) ; Pešice, Petr (referee)
Effects of orography on spatial distribution of convective precipitation in Banská Bystrica district (Slovakia) Abstract The presented diploma thesis deals with the issue of spatial distribution of convective precipitation over complex terrain in Banská Bystrica district in the middle part of the Slovak Republic. The primary aim of this thesis is to verify the relation between areal precipitation characteristics caused by deep convection, and morphometric terrain parameters in the study area. The next goal is to identify how the existence of terrain influences the precipitation mechanisms. Eight precipitation events with maximum areal daily totals in the warm part of years between 2005 and 2015 are studied in this thesis. The events are split into the four groups (S, W, E, N) with respect to prevailing direction of storm motion during respective days. The precipitation rating is based on rain gauge measurements and adjusted radar precipitation estimates produced in the INCA model. The spatial relation between convective precipitation and topography is quantified in radar pixels' network 1 x 1 km and in the closest surroundings (20 x 20 km squares) of the rain gauge stations. The products are using DEM with the 50 m, 1 km and 2 km spatial resolution. The strongest correlation is proved in the relation with...
Precipitation amount differences between fixed and sliding time windows
Razím, Matyáš ; Müller, Miloslav (advisor) ; Pokorná, Lucie (referee)
Title of Thesis: Precipitation amount differences between fixed and sliding time windows Author: Matyáš Razím Supervisor: RNDr. Miloslav Müller, Ph.D. Abstract This thesis introduces the issue of differences between precipitation totals measured within fixed and sliding periods (further as fixed and sliding totals). Because of several reasons, the precipitation is being measured in given intervals, in practice. Values obtained in this manner, however, are mostly lower than if the measuring period of the same length is set to include as much precipitation as possible. This is because the sliding total is split in two fixed totals. Therefore, values of certain precipitation characteristics, essential for the evaluation of potential hazards and their impact on the society, are often underestimated. So, the thesis presents a research of the precipitation measurement methods, as well as the previous explorations of the given matter and the influences determining the average magnitude of the fixed vs. sliding totals difference. This difference is expressed via the so called Hershfield factor, a coefficient used for conversion of sets of fixed totals to sliding totals. Its general value is most commonly determined as 1.13. It, however, varies according to the precipitation length, climate and several other...
El Niño / Southern Oscillation and its geographically remote manifestations
Navrátil, Jiří ; Huth, Radan (advisor) ; Müller, Miloslav (referee)
In the introductory part, a brief review of development of ENSO research is given, together with different ways of ENSO definitions. A basic description of the mechanism through which ENSO influences climate in the Pacific region follows. Summary of ENSO-related climate anomalies in different parts of the world as described in literature constitutes crucial part of the work. The latest related literature was preferred to be used in this part. In the second part, the ENSO influence on precipitation on the Iberian Peninsula is illustrated using correlation coefficients between values of Southern Oscillation Index (SOI) - one of the possible ENSO indicators - and monthly mean precipitaion anomalies from January 1966 and December 2015. The results are discussed with related literature used in the previous part of the work.
Comparison of heavy precipitation extremes at the turn of the 19th and the
Brych, Jan ; Müller, Miloslav (advisor) ; Kašpar, Marek (referee)
The purpose of my thesis is to evaluate the extremity of selected precipitation events on territory of the Czech Republic in 1890, 1896, 1897, 1899, 1902 and 1903. I used documented floods to identify specific precipitation events in this period. Individual events were examined by means of the WEI index (weather extremity index) and the frequency of measured precipitation amounts. The most extreme examined event occurred from 27 July to 31 July 1897. Its extremity was also determined by the affected area, which was almost the size of the entire Czech Republic. A very high value of 149 was calculated for the period from 1 September to 4 September 1890. For the events of September 1899, May 1896 and July 1903, the resulting value of WEI was close to the value of 80. The least extreme examined event occurred in June 1902 within a very small affected area (8,630 square kilometres). The recorded value was 25.3 WEI. When comparing the examined events and cases in the years 1961 - 2010 in terms of value of the WEI, I found that the years 1897 (first) and 1890 (fifth) are among the most extreme five years. For comparison, values of the WEI from July 1997, July 1981 and August 2002 were converted into a network of stations that applied to the surveyed years. The results proved the applicability of the WEI...

National Repository of Grey Literature : 41 records found   1 - 10nextend  jump to record:
See also: similar author names
11 Muller, M.
5 MÜLLER, Marek
14 MÜLLER, Martin
11 Müller, M.
5 Müller, Marek
14 Müller, Martin
3 Müller, Matyáš
8 Müller, Michal
14 Műller, Martin
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