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(Article of periodic en Anglais - 2012)

Document title

Changes of river bed pattern of a lowland river : effect of natural processes or anthropogenic intervention ?

Authors(s) and Affiliation(s)

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

Abstract

GPR and aerial surveys were conducted to study changes of channel pattern in the lower course of the Obra River (western Poland). A 3D analysis of the GPR data supported with lithologic information indicated traces of a multi-channel pattern. A variable orientation of sediment layering within channel bars and differences in channels depth and width pointed to changes of direction of the river bed migration. Analysis of aerial photographs and a satellite image indicated that only a few of the channels inferred from GPR could be discerned. Analysis of historical maps from the eighteenth and the nineteenth centuries showed that 250 years ago the Obra was a meandering river. The maps illustrate also several meander cutoffs and decreased wetlands surface. Two types of transformations are highlighted : from braided to meandering channel pattern; from meandering to sinuous pattern with channel islands and then to sinuous with oxbow lakes

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 : 2012, vol. 94, no3 [pp. 301-320]

Bibliographic references : 2 p.

Collation : 12 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2011.00432.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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