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(Article of periodic en Anglais - 2014)

Document title

Holocene evolution of meander bends in lowland river valley formed in complex geological conditions (the Obra River, Poland)

Authors(s) and Affiliation(s)

SŁOWIK M. (1) ;
(1) Dept. of Geographic and Geologic Sciences, Adam Mickiewicz Univ., Poznán, POLOGNE

Abstract

Ground-penetrating radar surveys, coring and the analyses of satellite and aerial images have been carried out to study differences in the evolution of meander bends formed in various geological conditions, in the lower course of the Obra River (western Poland). Four types of meanders were distinguished : laterally migrating bends characterized by frequent changes of migration direction accompanied by river bed avulsions and cutoffs; bends with traces of continuous migration limited by stagnant water basin deposits; confined meanders in a narrow valley formed in glacial till characterized by the occurrence of mid-channel islands; and meanders with traces of complex changes of the river bed migration influenced by anthropogenic intervention followed by intensive overbank deposition. Moreover, traces of an early development of the Obra valley and remains of multi-channel pattern were discovered. It is also found that the development of the studied meanders was slow compared with cases of actively migrating meandering rivers

Source

Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2014, vol. 96, no1 [pp. 61-81]

Bibliographic references : 2 p.

Collation : 14 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/geoa.12029

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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