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(Article of periodic en Anglais - 2010)

Document title

Reconciled bedload sediment transport rates in ephemeral and perennial rivers

Authors(s) and Affiliation(s)

CAO Z. (1 2) ; HU P. (1) ; PENDER G. (1) ;
(1) School of the Built Environment, Heriot-Watt Univ., Edinburgh, ROYAUME-UNI
(2) State Key Lab. of Water Resources and Hydropower Engineering Science, Univ., Wuhan, CHINE

Abstract

Here a time scale analysis of bedload transport is presented as pertaining to Nahal Yatir (Israel), which demonstrates that bedload transport can adapt sufficiently rapidly to capacity determined exclusively by local flow regime, and accordingly the transport capacity formulations developed for steady flows (Oak Creek, Oregon State, USA) can be applied even under unsteady flows such as flash floods. Complementing the time scale analysis, a series of computational exercises using a coupled shallow water hydrodynamic model are shown to adequately resolve the observation of the very high rates of bedload transport by flash floods in Nahal Yatir. While bedload transport rates in ephemeral and perennial rivers differ remarkably when evaluated against a pure flow parameter such as specific stream power, they are essentially reconciled if assessed with a physically sensible parameter incorporating not only the flow regime but also the sediment particle size

Source

Article of periodic

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

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

Millesime : 2010, vol. 35, no14 [pp. 1655-1665]

Bibliographic references : 43 ref.

Collation : 11 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.2005

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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