Authors
Bernard De Serres, André G Roy, Pascale M Biron, James L Best
Publication date
1999/1/1
Journal
Geomorphology
Volume
26
Issue
4
Pages
313-335
Publisher
Elsevier
Description
This paper presents three-dimensional data of the mean and turbulent structure of flow collected at a natural confluence of rivers with discordant beds to (1) describe the three-dimensional flow field of a natural junction of channels; (2) assess the role of changes in bed morphology occurring during transport-effective events on the structure of flow at a confluence; and (3) examine how the three-dimensional structure of flow varies with changes in the ratio of momentum flux between the two confluent streams. Three-dimensional measurements of velocity were reconstructed from the measurements obtained with an array of four, two-component electromagnetic current meters. Six detailed velocity profiles were taken at five cross-sections in a wide range of flow conditions. The mean field of flow is characterised by (1) the acceleration of flow in the downstream portion of the post-confluence channel, but by lower …
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Scholar articles
B De Serres, AG Roy, PM Biron, JL Best - Geomorphology, 1999