IGB

Connexion

(Article of periodic en Anglais - 2011)

Document title

River channel and bar patterns explained and predicted by an empirical and a physics-based method

Authors(s) and Affiliation(s)

KLEINHANS M.G. (1) ; VAN DEN BERG J.H. (1) ;
(1) Dep. of Physical Geography, Univ., Utrecht, PAYS-BAS

Abstract

The AA. compare an empirical stream power-based classification and a physics-based bar pattern predictor. They present a careful selection of data from the literature that contains rivers with discharge and median bed particle size ranging over several orders of magnitude with various channel patterns and bar types, but no obvious eroding or aggrading tendency. Empirically a continuum is found for increasing specific stream power, here calculated with pattern-independent variables: mean annual flood, valley gradient and channel width predicted with a hydraulic geometry relation. ‘Thresholds’, above which certain patterns emerge, were identified as a function of bed sediment size. Bar theory predicts nature and presence of bars and bar mode, here converted to active braiding index (Bi). The most important variables are actual width–depth ratio and nonlinearity of bed sediment transport. Results agree reasonably well with data

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, no6 [pp. 721-738]

Bibliographic references : 2 p.

Collation : 13 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2090

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
Refdoc record number (ud4) : 24547208 : Permanent link - XML version
Powered by Pxxo