Configuration of channel bars in Černá Opava River as a consequence of flooding in September 2007
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Trvalý odkaz
http://hdl.handle.net/20.500.11956/161818Identifikátory
Kolekce
- GEOBIBLINE - plné texty [10555]
Autor
Datum vydání
2010Klíčová slova (česky)
geologieKlíčová slova (anglicky)
channel bars, floodplain, flood, fluvial processesThe article deals with changes of setting of channel bass which originate from the overbank flooding events. Channel bars carry information about flow behaviour during and out of flooding. They characterize processes inside the river channel. Characteristics of bars, (location of the channel, length, width of bars, granularity, gradation setting etc.) as well as their changes during the flood are described by statistical methods (ANOVA, correlation). Correlation matrix detecting relations between all studied characteristics of channel bars before and after the flooding was created. Causes of these changes or stability of given characteristics are analyzed in the discussion. During the September 2007 flood on Černá Opava River a number of channel bass increased, the existing accumulations particularly channel bars near bends (for example scroll bars or point bars) became larger. Channel bass got connected with the banks due to their enlargement after the Hood. On the contrary, accumulations (lateral bars) placed further from bends were reduced. Faster and more complicated flow during the flood enables creation of new bass with inverse gradation