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(Article of periodic en Anglais - 2010)

Document title

The distribution and residence time of suspended sediment stored within the channel margins of a gravel-bed bedrock river

Authors(s) and Affiliation(s)

SKALAK K. (1) ; PIZZUTO J. (1) ;
(1) Dep. of Geological Sciences, Univ. Delaware, Newak, ETATS-UNIS

Abstract

Previously undocumented deposits are described that store suspended sediment in gravel-bedded rivers, termed ‘fine-grained channel margin’ (FGCM) deposits. They consist of sand, silt, clay, and organic matter that accumulate behind large woody debris (LWD) along the margins of the wetted perimeter of the single-thread, gravel-bed South River in Virginia. The distribution of ages in these deposits can be fitted by a power function, suggesting that sediment stored in the deposits has a wide variety of transit times. The presence of FGCM deposits indicates that suspended sediment is not simply transported downstream in gravel-bed rivers in agricultural watersheds: significant storage can occur over decadal timescales. South River has a history of mercury contamination and identifying sediment sources and sinks is critical for documenting the extent of contamination and for developing remediation plans

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, no4 [pp. 435-446]

Bibliographic references : 67 ref.

Collation : 8 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1926

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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