IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

Reconstructing of anastomosing river

Authors(s) and Affiliation(s)

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

Abstract

Intensive hydro technical works were conducted in the middle course of the Obra River (Poland) at the beginning of the nineteenth century. The "natural" river course (functioning before the major construction works) was transformed into 3 artificial canals. Ground-penetrating radar investigations, ground-truthed with coring and remote sensing surveys, were conducted to reconstruct the course taken by the river prior to the hydro technical works. This work demonstrated that the Obra formerly had an anastomosing planform. Radiocarbon dating indicated that the earliest of the retraced channels were active before 9000 BP. The retraced river system was formed in a proglacial stream valley perpendicularly cut by remains of subglacial tunnels, now partly filled with lakes. The planform consisted of one or two major channels and a number of secondary channels formed by avulsions. During the last 2000 years, some of the avulsions may have been caused by anthropogenic interventions. Valley sections with meandering anabranches, anastomosing patterns with traces of a lateral migration and traces of a transition from meandering to anastomosing planform were distinguished

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, no2 [pp. 195-216]

Bibliographic references : 64 ref.

Collation : 15 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/geoa.12042

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681486 : Permanent link - XML version
Powered by Pxxo