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(Article of periodic en Anglais - 2012)

Document title

Sediment mobility and bed armoring in the St Clair River : insights from hydrodynamic modeling

Authors(s) and Affiliation(s)

LIU X. (1) ; PARKER G. (2 3) ; CZUBA J.A. (4 5) ; OBERG K. (4) ; MIER J.M. (2) ; BEST J.L. (2 3) ; PARSONS D.R. (6) ; ASHMORE P. (7) ; KRISHNAPPAN B.G. (8) ; GARCIA M.H. (2) ;
(1) Dep. of Civil and Environmental Engineering, Univ. of Texas, San Antonio, ETATS-UNIS
(2) Ven Te Chow Hydrosystems Lab., Dept of Civil and Environmental Engineering, Univ. of Illinois, Urbana, ETATS-UNIS
(3) Dep. of Geology, Geography, and Mechanical Science and Engineering, Univ. of Illinois, Urbana, ETATS-UNIS
(4) US Geological Survey, Office of Surface Water, Illinois, Urbana, ETATS-UNIS
(5) US Geological Survey, Washington, Tacoma, ETATS-UNIS
(6) School of Earth and Environment, Univ., Leeds, ROYAUME-UNI
(7) Dep. of Geography, Univ. of Western Ontario, London, CANADA
(8) Aquatic Ecosystem Impacts Research Branch, National Water Research Inst., Canada Centre for Inland Waters, ON, Burlington, CANADA

Abstract

A numerical modeling approach with field data is used here to investigate the possibility of sediment movement in the St Clair River and assess the likelihood of morphological change under the current flow regime. A two-dimensional numerical model was used to study flow structure, bed shear stress, and sediment mobility/armoring over a range of flow discharges. Boundary conditions for the numerical model were provided by detailed field measurements that included high-resolution bathymetry and three-dimensional flow velocities. The results indicate that, without considering other effects, under the current range of flow conditions, the shear stresses produced by the river flow are too low to transport most of the coarse bed sediment within the reach and are too low to cause substantial bed erosion or bed scour. However, the detailed maps of the bed show mobile bedforms in the upper St Clair River that are indicative of sediment transport

Source

Article of periodic

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

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

Millesime : 2012, vol. 37, no9 [pp. 957-970]

Bibliographic references : 1 p.

Collation : 15 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.3215

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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