IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

A test of equilibrium theory and a demonstration of its practical application for predicting the morphodynamics of the Yangtze River

Authors(s) and Affiliation(s)

HUANG H.Q. (1) ; DENG C. (1) ; NANSON G.C. (3) ; FAN B. (2) ; LIU X. (1) ; LIU T. (2) ; MA Y. (1) ;
(1) Key Lab. of Water Cycle and Related Land Surface Processes, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, CHINE
(2) Changjiang River Scientific Research Inst., Wuhan, CHINE
(3) School of Earth and Environmental Sciences, Univ., Wollongong, AUSTRALIE

Abstract

Taking the width/depth ratio of a river channel as an independent variable, a variational analysis of basic flow relationships shows that alluvial-channel flow adjusts channel geometry to achieve stationary equilibrium when the condition of maximum flow efficiency (MFE) is satisfied. As a test of the veracity of MFE and to examine if this theory of self-adjusting channel morphodynamics can be practically applied to large river systems, this study examines the degree of correspondence between theoretically determined equilibrium channel geometries and actual measurements along the middle and lower Yangtze River. Using 4 different forms of the Meyer-Peter and Müller bedload relation and relations of flow continuity and resistance the AA. show that the Meyer-Peter and Müller bedload relation modified on the basis of MFE theory predicts channel dimensions most accurately when applied to the middle and lower Yangtze River. This provides convincing evidence supporting MFE equilibrium theory

Source

Article of periodic

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

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

Millesime : 2014, vol. 39, no5 [pp. 669-675]

Bibliographic references : 1 p.

Collation : 4 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3522

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28518795 : Permanent link - XML version
Powered by Pxxo