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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Spatial distribution and morphological analysis of river islands in the Czech Republic
 Růžičková, Veronika ; Křížek, Marek (advisor) ; Kalvoda, Jan (referee)
The topic of this thesis is spatial distribution of mid-channel bars on Czech rivers. Its aim is to describe the laws of their morphology and distribution in the river channel using remote analysis of aerial photographs. Czech islands originate in places where the flow slows down, mainly in bends and around obstacles in the channel. Their main axis is in the most cases parallel to the course of the streamline. The width of the channel and the presence of vegetation have an undeniable effect on the size of the islands. The presence and morphological characteristics of the river islands also reflect human intervention in the course of the river channel, where does it matter whether it is an artificial channel with hardened banks or a natural-looking one. Key words: fluvial geomorphology, mid-channel bars, river islands, sedimentation, Czech rivers
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Documentation of flood events on Czech rivers at the end of the 18th and in the 19th century, based on the oldest hydrological measurements
 Munzar, Jan ; Ondráček, Stanislav ; Elleder, L.
Disregarding the old flood marks, we can consider the beginning of hydrological measurements on Czech watercourses to be occasional observations made by prof. A. Strnad on the Vltava (Moldau) River in Prague in the 1780s where he watched the extreme water levels from his observatory in the Klementinum by using binoculars. The beginning of regular observations in our country is usually considered the measurement on the Vltava R. in Prague dated 1825, which is however somewhat disputable (as far as our knowledge goes, regular measurements are documented only two years later). Nevertheless, the authors succeeded in finding evidence about water level observations on the Odra River in Bohumín already from year 1820, which lasted respectable sixty years on the Austrian-Prussian section of the watercourse. The paper is focused namely on the analysis and evaluation of their half-forgotten results.
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