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Časovo- priestorová variabilita morfológie divočiaceho a migrujúceho vodného toku Belá

In: Geografický časopis, vol. 64, no. 4
Anna Kidová Číslo ORCID - Milan Lehotský

Details:

Year, pages: 2012, 311 - 333
Keywords:
channel changes, extreme floods, pattern, indices, braided-wandering river, the River Belá
About article:
The paper deals with the braided-wandering type of channel organization. The river reach of the River Belá (1,7 km long) situated in the north of Slovakia has been analysed in order to comprehend its evolutionary trend. Historical maps and aerial photos (1837-2009, nine time horizons) with comparable discharge conditions have been used for the pattern investigation in the ArcGIS. The braided as well as migration indices have served as main tools for the assessment of changes in braided pattern. From 2003 until 2009 the number of islands increased by a third but the number of bars decreased by half. In spite of higher channel water levels during the time of imagining in 2001 and 2008, the decrease of the braiding index value by a half was observed. The notable decrease of the migration index does not correspond to the increasing trend of the number of islands. The decreasing trend of the erosion corridor shows the long term degradation of the river system as is reflected by changes such as the channel straightening or the increase in the area of islands. The present status could be considered as the near-threshold behaviour of the dynamic metastable equilibrium river system.
How to cite:
ISO 690:
Kidová, A., Lehotský, M. 2012. Časovo- priestorová variabilita morfológie divočiaceho a migrujúceho vodného toku Belá. In Geografický časopis, vol. 64, no.4, pp. 311-333. 0016-7193.

APA:
Kidová, A., Lehotský, M. (2012). Časovo- priestorová variabilita morfológie divočiaceho a migrujúceho vodného toku Belá. Geografický časopis, 64(4), 311-333. 0016-7193.