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(Article of periodic en Anglais - 2013)

Document title

Particle path characteristics at the large gravel-bed river Danube : results from a tracer study and numerical modelling

Authors(s) and Affiliation(s)

LIEDERMANN M. (1) ; TRITTHART M. (1) ; HABERSACK H. (1) ;
(1) Lab. for Advanced Methods in River Modelling and Engineering, Inst. of Water Management, Univ. of Natural Resources and Life Sciences, Vienna, AUTRICHE

Abstract

A tracer study performed on a 3 km long reach of the Danube River in Austria is presented. Forty artificial stones of 3 different sizes were produced and a coded radio acoustic transmitter was implanted. The positions of the stones were observed approximately once a week, depending on hydrology, over a period of at least one year by radio-tracking from a boat, including a 15 year flood event. Transport paths and velocities, as well as the incipient motion of bedload transport, could be therefore monitored on a large gravel-bed river. The particle paths were found to be mostly bankline-parallel. A three-dimensional (3D) numerical model using a stochastic particle tracing approach was validated with the data, indicating that the observed positions are well reproduced by the model. Single tracer stones were transported up to 1000 m during a single flood event. Size-selective behaviour could be shown and the incipient motion of the large 70 mm gravel was detected at lower discharges than predicted by commonly used uniform bedload transport formulae

Source

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, no5 [pp. 512-522]

Bibliographic references : 1 p.

Collation : 9 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.3338

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