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(Article of periodic en Anglais - 2011)

Document title

Channel bar dynamics on multi-decadal timescales in an active meandering river

Authors(s) and Affiliation(s)

HOOKE J.M. (1) ; YORKE L. (2) ;
(1) Dep. of Geography, Univ., Liverpool, ROYAUME-UNI
(2) Inst. of Geography & Earth Sciences, Univ., Aberystwyth, ROYAUME-UNI

Abstract

Four sets of aerial photographs in the period 1984-2007 were used to map and quantify bar numbers and areas in GIS on an active meandering reach of the River Dane (Cheshire). Bar types were classified. Additional temporal resolution was provided by annual ground photography and mapping for 1981-2010. Analysis was extended backward by use of large scale Ordnance Survey maps from 1873 onwards. As expected, point bars are the most common type but "free" bars of several types are major components of bar deposition. Bar activity shows a relation with discharge events and phases and possibly with changing riparian conditions, but superimposed on this is a common sequence of bar evolution from incipient gravel mid-channel bars to full floodplain integration. This life-cycle is identified as 7-9 years on average. No evidence for mobility of free bars within the course is found. Variability of bar occurrence needs to be taken into account in river management and ecological evaluation

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no14 [pp. 1910-1928]

Bibliographic references : 59 ref.

Collation : 15 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2214

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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