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Disastrous winter flood in Czech lands and Central Europe in 1862 (at its 150th anniversary)
Munzar, Jan ; Ondráček, Stanislav ; Hrádek, Mojmír
In 2012, we commemorate anniversaries of several important floods – not only more recent disasters but also some older historic cases. One of overwhelming natural calamities of the 19th century was the winter flood from 1862 since which already 150 years have elapsed. It affected not only Czech lands but also Germany and Austria. Until today, it is the second heaviest flood (after the flood disaster in March 1845) for the period of assessing Labe/Elbe River discharge values in Děčín. A rather surprising fact is that the flood in August 2002 was lower there than the two mentioned events and in terms of culmination discharge ranks only at the third place. This paper aims at reminding the hydrological extreme of Central-European scale and to document it with preserved data and information.
Fulltext: content.csg -  PDF
Plný tet: UGN_0399400 - PDF
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Mass and energy inputs/outputs in the energy complex Dukovany-Dalešice and their impacts on the landscape
Hrádek, Mojmír
The Dukovany-Dalešice energy complex, situated west of Brno consist of the Dukovany nuclear power station (NPS) and of the Dalešice pumping power plant (PPP) with equalization reservoir. Geomorphic investigations were targeted the landforms and processes related with mass and energy inputs/outpust and their potential negative impacts. Individual landforms affected by negative impacts were analyzed in detail with using of a systém aproach. Inputs into NPS are limited to the water supply outputs are conncted with some negative response with direkt and indirect human impacts (erosion caused by waste water, equalization reservoir´s bank erosion, hillslopes stability exceeding and lanslide origin etc.).
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Hummock Grasses on the Mt. Keprník: Contribution to the Earth Hummocks Origin Discussion
Hrádek, Mojmír
Proofs submitted hitherto in evidence of earth hummocks cryogenic origin have been found as little probative. In presented poster, the attention was focused on the role of vegetation in hummocks origin. Some of hummocks are formed by dominant grass tussock with special habitus. Hummock grasses in the genus Carex sp., Eriophorium sp., resp. Juncus trifidi and Deschampsia sp. grow as an expanding dome, with green leaves in the centre and dead leaves at outer margin. Layer of dry leaves may be up to 5 cm thick and can serve as heat-insulation layer protecting frozen ground thawing in spring-time. Similar grass hummocks are typical not only for wind-swept alpine grasslands but also for low ranges and plains.
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Valley of the Desná River – the deepest valley of the Hrubý Jeseník Mts
Hrádek, Mojmír
An outline of geomorphic division, geological setting and landforms development is given focused namely to the valley of the Desná R. and southern part of the Hrubý Jeseník Mts. Then the data on the functioning of re-pumping reservoir Dlouhé Stráně and activity of extremal hillslope processes and historical floods in the channel of Desná River.
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The Jihlava River floodplain transformation on 1 April 2006 winter flood at Ivančice and Dolní Kounice.
Hrádek, Mojmír
The winter flood culminating on 1 April 2006 at Ivančice was generated by fast thawing of extremely thick snow cover which was accompanied by rain. The course of the flood in reach of the valley between Ivančice and Dolní Kounice was documented and a strong influence of dam reservoir of Dalešice of runoff in the Jihlava R. confirmed. The geomorphic effectiveness of the flood was not so big, nevertheless traces of erosion arisen by share stress of flood overbank flow and spectrum of depositional forms of slackwater from the end of flood was found. Features of founded geomorphic effects have been compared with that ones of the historical floods. An attempt to date some of erosional channels with floods from the years 1862 or 1876 has been made.
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Cause and consequences of destructive floods in time of upland colonisation in 13. a 14. Century
Hrádek, Mojmír
Villages originated during medieval coloniozation of uplands in 13. and 14. Century were affected by floods from heavy rainfalls. Some of them or their parts were demaged. Attention was devoted to analyse of gullies and alluvial fans in neighbourhood of deserted village of Bystřec in Drahanská vrchovina Upland. The question was discussed whether decisive role in floods and rainfalls origin had human impact linked to colonization or climatic changes.
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The megaforms of oval pattern in granite of the Bohemian Massif
Hrádek, Mojmír
In territory build of Central Moldanubian Pluton morphologically evident structures of oval pattern have been found, most of as granite domes and rarely as ring structures. Megaforms have distinct relation to negative anomalies of gravity fields of granite intrusions. Characteristic features of ovals have been described.
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