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Changes in extremity and seasonality of floods in the Zdobnice River basin
Čermák, Daniel ; Langhammer, Jakub (advisor) ; Šobr, Miroslav (referee)
The object of the bachelor thesis is to analyze the change of extremity and seasonality of floods in the Zdobnice basin. The literary research comprehensively presents floods with description of the biggest historical floods in the Czechia and in the Zdobnice basin. The literary research also includes the physical-geographical characteristic of the studied area. The practical part is based on the daily flow data analysis, obtained from CHMI (Czech Hydrometeorological Institute). Runoff analysis is performed on the base of these data, with focus on extreme flows. To compare the seasonality change, data series is divided into two periods (1945-1969 and 1970-2014), which point of change was determined by Pettit's and Buishand's homogeneity test. Seasonality change is compared by directional statistics, polar graphs, curves of cumulative frequency and flood index. As a result of these methods, it is found that in the second period, the flood risk is greater in earlier parts of the year. It has been also found, that there are more flood events in July. Key words: Floods, discharge, hydrological extremes, historical floods, seasonality, Zdobnice
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Evaluation of historical flood, Sázava River, 1909
Jelínková, Karolína ; Šobr, Miroslav (advisor) ; Kliment, Zdeněk (referee)
This Bachelor thesis deal with the problems of floods on river Sazava. There are described types and characteristic of floods. The thesis sums up methods of historical flood research. It reviews all known floods on Sazava since 1515 up until 2006. While researching these floods, some previous works about Sazava and also historical documents from archives were used. From the found events, the seasonality of floods is made. The floods in 1909 was researched in more detail in the Kacov profile. The cause-factors of the floods and their process are studied closely as is the process of the flood itself. For the Kacov profile, the specific curve was calculated and the flood wave was described. The progression times of the flood were evaluated. Key words: flood, historical flood, Sázava, Kácov, sezonality, 1909
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