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(Article of periodic en Anglais - 2013)

Document title

Sediment routing hypothesis for pool-riffle maintenance

Authors(s) and Affiliation(s)

MILAN D.J. (1) ;
(1) Dept. of Geography, Environment and Earth Sciences, Univ., Hull, ROYAUME-UNI

Abstract

This paper provides evidence that sediment routing around pools is a key mechanism for pool-riffle maintenance in sinuous upland gravel-bed streams. A combination of clast tracing using passive integrated transponder (PIT) tagging and bedload traps (positioned along the thalweg on the upstream riffle, pool entrance, pool exit and downstream riffle) are used to provide information on clast pathways and sediment sorting through a single pool-riffle unit. Computational fluid dynamics (CFD) is also used to explore hydraulic variability and flow pathways. Clast tracing results provide a strong indication that clasts are not fed through pools, rather they are transported across point bar surfaces, or around bar edges. Spatial variations in bedload transport were found throughout the pool-riffle unit. The pool entrance bedload trap was often found to be empty, when the others had filled, further supporting the notion that little or no sediment was fed into the pool. The pool exit slope trap would occasionally fill with sediment, thought to be sourced from the eroding outer bank

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, no14 [pp. 1623-1641]

Bibliographic references : 2 p.

Collation : 11 fig., 7 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3395

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