(Article of periodic en Anglais - 2014)

Document title

Effect of cross-section interpolated bathymetry on 2D hydrodynamic model results in a large river

Authors(s) and Affiliation(s)

CONNER J.T. (1) ; TONINA D. (2) ;
(1) Idaho Power Company, Water and Resource Planning Dept., Boise, ETATS-UNIS
(2) Center for Ecohydraulics Research, Univ. of Idaho, Boise, ETATS-UNIS


The AA. investigated the effects of cross-section spacing on flow properties simulated with 2D modeling at low, medium and high discharges in 2 morphologically different reaches, a simple (almost featureless with low sinuosity) and a complex (presenting pools, riffles, runs, contractions and expansions) reach of the Snake River (Idaho). They compared the results from 2D models developed with complete channel bathymetry acquired with multibeam sonar data and photogrammetry, with 2D model results that were developed using interpolated topography from uniformly distributed transects. Results indicate that cross-sections spaced equal to or greater than 2 times the average channel width (W*) smooths the bathymetry and suppresses flow structures. Conversely, models generated with cross-sections spaced at 0.5 and 1 W* have stream flow properties, sediment mobility and spatial habitat distribution similar to those of the complete bathymetry. Furthermore, differences in flow properties between interpolated and complete topography models generally increase with discharge and with channel complexity


Article of periodic

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

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

Millesime : 2014, vol. 39, no4 [pp. 463-475]

Bibliographic references : 2 p.

Collation : 7 fig., 3 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3458

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