Secondary circulation in natural streams

Demissie, M.; Soong, T.W.; Bhowmik, N.G.; Fitzpatrick, W.P.; Maxwell, W. Hall C.

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https://hdl.handle.net/2142/90125 Copy

Description

Title

Secondary circulation in natural streams

Author(s)

• Demissie, M.
• Soong, T.W.
• Bhowmik, N.G.
• Fitzpatrick, W.P.
• Maxwell, W. Hall C.

Contributor(s)

• Illinois State Water Survey
• University of Illinois at Urbana-Champaign

Issue Date

1986-07

Keyword(s)

• Water resources center
• Water resources center--Illinois
• Hydrology and hydraulics
• Computer
• Data acquisition
• Model
• Secondary circulation
• Secondary current
• Streams
• Transverse current
• Velocity

Geographic Coverage

Illinois (state)

Abstract

Secondary circulation which is sometimes referred to as secondary flow, secondary current or transverse current is an important phenomenon in natural streams and plays an important role in many natural processes in streams such as stream channel meander, bank erosion, bed scour, resuspension, and movement of sediment. Secondary circulation is that component of flow which is not in the main flow direction and is small as compared to the main flow velocity. A computerized data collection system for secondary circulation data acquisition in natural streams was developed and utilized in the field. The system includes an electromagnetic current meter, a micro-computer, an interface between the computer and the current meter, and a specially designed supporting structure. Secondary circulation data was collected in the Sangamon River near Mahomet, Illinois, utilizing the data collection system. A mathematical model for secondary circulation based on an existing model has been developed and tested against the data collected in the field. Model results generally reproduce similar secondary circulation patterns as observed from the field data but over-estimate the magnitudes of the velocities.

Publisher

University of Illinois at Urbana-Champaign. Water Resources Center

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/90125

Sponsor(s)/Grant Number(s)

• U.S. Department of the Interior
• U.S. Geological Survey

Copyright and License Information

Copyright 1986 held by the authors

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