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Time-averaged Flow Structure in the Central Region of a Stream Confluence by Rhoads, Bruce L.; Kenworthy, Stephen T. is a Environmental Science article available to read on EtoBox.

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Previous process-oriented field studies of stream confluences have focused mainly on fluvial dynamics at or immediately downstream of the location where the confluent flows enter the downstream channel. This study examines in detail the spatial evolution of the time-averaged downstream velocity, cross-stream velocity, and temperature fields between the junction apex, where the flows initially meet, and the entrance to the downstream channel. A well-defined, vertically oriented mixing interface exists within this portion of the confluence, suggesting that lateral mixing of the incoming flows is limited. The downstream velocity field near the junction apex is characterized by two high-velocity cores separated by an intervening region of low-velocity or recirculating fluid. In the downstream direction, the high-velocity cores move inwards towards the mixing interface and high-velocity fluid progressively extends downwards into a zone of scour, resulting in an increase in flow velocity in the centre of the confluence. The cross-stream velocity field is dominated by flow convergence, but also includes a component associated with a consistent pattern of secondary circulation. This patter

Who reads Time-averaged Flow Structure in the Central Region of a Stream Confluence?

Author

Rhoads, Bruce L.; Kenworthy, Stephen T.

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0360-1269)

Published

1998

Language

EN

Field

Environmental Science (Physical Sciences)