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

Auteur(s) et Affiliation(s)

LIU, X.

Dep. of Civil and Environmental Engineering, Univ. of Texas, San Antonio, Etats-Unis

PARKER, G.

Ven Te Chow Hydrosystems Lab., Dept of Civil and Environmental Engineering, Univ. of Illinois, Urbana, Etats-Unis

Dep. of Geology, Geography, and Mechanical Science and Engineering, Univ. of Illinois, Urbana, Etats-Unis

CZUBA, J.A.

US Geological Survey, Office of Surface Water, Illinois, Urbana, Etats-Unis

US Geological Survey, Washington, Tacoma, Etats-Unis

OBERG, K.

US Geological Survey, Office of Surface Water, Illinois, Urbana, Etats-Unis

MIER, J.M.

Ven Te Chow Hydrosystems Lab., Dept of Civil and Environmental Engineering, Univ. of Illinois, Urbana, Etats-Unis

BEST, J.L.

Ven Te Chow Hydrosystems Lab., Dept of Civil and Environmental Engineering, Univ. of Illinois, Urbana, Etats-Unis

Dep. of Geology, Geography, and Mechanical Science and Engineering, Univ. of Illinois, Urbana, Etats-Unis

PARSONS, D.R.

School of Earth and Environment, Univ., Leeds, Royaume-Uni

ASHMORE, P.

Dep. of Geography, Univ. of Western Ontario, London, Canada

KRISHNAPPAN, B.G.

Aquatic Ecosystem Impacts Research Branch, National Water Research Inst., Canada Centre for Inland Waters, ON, Burlington, Canada

GARCIA, M.H.

Ven Te Chow Hydrosystems Lab., Dept of Civil and Environmental Engineering, Univ. of Illinois, Urbana, Etats-Unis

Description :
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.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 9, p. 957-970, nombre de pages : 14, Références bibliographiques : 1 p.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais