(Article of periodic en Anglais - 2013)

Document title

Discrimination of alluvial and mixed bedrock–alluvial multichannel river networks

Authors(s) and Affiliation(s)

MESHKOVA L.V. (1) ; CARLING P.A. (1) ;
(1) Geography and Environment, Univ., Southampton, ROYAUME-UNI


This paper explores the use of planview morphological metrics to quantitatively describe and distinguish mixed bedrock–alluvial multichannel networks from alluvial multichannel networks. The geometries of the channel planforms of 2 bedrock-constrained networks (Mekong and Orange rivers) are compared with the classic alluvial anastomosed Upper Columbia River and the wandering Ganga River. Widely recognized indices utilized include : channel link count and channel sinuosity, and less common metrics : network bifurcation angles and island shape characteristics (aspect ratio, compactness, roundness and convexity). Bifurcation angles for all 4 multichannel rivers are significantly greater than angles reported for braiding rivers. Island convexity clearly discriminates the 2 alluvial rivers from the 2 bedrock-influenced rivers. The width of the macrochannel, in which each network develops, has a positive influence on the number of channel links and is further related to channel slope variations. The geometry of multichannel networks are often laterally constrained


Article of periodic

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

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

Millesime : 2013, vol. 38, no11 [pp. 1299-1361]

Bibliographic references : 2 p.

Collation : 15 fig., 5 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3417

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