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Changes in the spring precipitation characteristics in the Czech republic during the period 1984-2014
Kuchynková, Jindřiška ; Pokorná, Lucie (advisor) ; Rulfová, Zuzana (referee)
The purpose of this work is a detailed description of spring precipitation totals in the Czech Republic, which has not been examined in more detail yet. The main aims of the diploma thesis are i) comparison of precipitation characteristics at individual stations for the period 1984-2014 and analysis of temporal and spatial variability of precipitation, ii) division of stations into three categories (lowland stations, stations in middle positions, mountain stations) based on altitude, average spring total precipitation and surrounding relief, and iii) division of stations by cluster analysis and comparison of precipitation characteristics between individual categories of stations obtained by subjective and objective methods. Statistical and precipitation characteristics include monthly and seasonal precipitation total, numbers of wet and dry days, numbers of days with a total above 5,10,15, and 20 mm, frequency and length of dry and wet periods, index of torrential rainfall and trends of these characteristics. The results show increasing linear trends of spring precipitation totals in all station categories, however these trends are statistically insignificant. The driest stations are lowland stations with an average spring precipitation total of 139,3 mm, the highest median of 169 dry periods, and...
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Siltation of the Kadaň water reservoir
Kuchynková, Jindřiška ; Šobr, Miroslav (advisor) ; Chalupová, Dagmar (referee)
The Kadaň water reservoir was built on the river Ohře in 1971. It is considered as a deepend river bed rather then the water reservoir . As with others water reservoirs, there continues to be happening an intense siltation with various types of sediments. This bachelor thesis aims to identify a current state and the change that has passed over the last 18 years and based on those obtained informations create a bathymetric map. The thesis is based on data from 1984, 2000 and my own field mapping in 2018. For measuring water depths I used a system RiverSurveyor. The data were processed in programs Microsoft Office Excel and ArcMap. For creating a bathymetric map I used a Kriging interpolation method. The results showed that compared to year 2000, the siltation has increased by 5%. Currently, the reservoir is silted by 47%. It is located in an area of 545 941 m2 and its volume amounts to 1 385 862 m3 . In 1972, when the reservoir was filled, it had a volume of 2 620 000 m3 . According to the results of measuerement we can conclude that over the last 46 years there has been created 1 234 138 m3 of sediments in the reservoir.
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