Suspended sediment transport in the benthic nepheloid layer in southeastern Lake Michigan

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Description

Time series observations of water temperature, water transparency, and current velocity were made at four stations located on the lake slope of southeastern Lake Michigan. The observations show that during stratified conditions the benthic nepheloid layer is probably not maintained by the local resuspension of bottom sediment. A more likely source is sediment resuspended further inshore and then transported across the shelf and slope during downwelling events. Internal wave action may be an important source of energy for this transport. Although sediment trap studies suggest that resuspension does occur, it is more likely that increased fluxes observed near the bottom ... continued below

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54 p.

Creation Information

Hawley, N. & Lesht, B.M. February 1, 1995.

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  • Hawley, N. Great Lakes Environmental Research Lab., Ann Arbor, MI (United States)
  • Lesht, B.M. Argonne National Lab., IL (United States)

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Description

Time series observations of water temperature, water transparency, and current velocity were made at four stations located on the lake slope of southeastern Lake Michigan. The observations show that during stratified conditions the benthic nepheloid layer is probably not maintained by the local resuspension of bottom sediment. A more likely source is sediment resuspended further inshore and then transported across the shelf and slope during downwelling events. Internal wave action may be an important source of energy for this transport. Although sediment trap studies suggest that resuspension does occur, it is more likely that increased fluxes observed near the bottom are due to the vertical redistribution of material already in suspension. A benthic nepheloid layer also exists at times during the unstratified period, when occassionally enough energy reaches the bottom to directly resuspend bottom material at the sites.

Physical Description

54 p.

Notes

OSTI as DE95007143

Source

  • Other Information: PBD: [1995]

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  • Other: DE95007143
  • Report No.: ANL/ER/PP--80505
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/26526 | External Link
  • Office of Scientific & Technical Information Report Number: 26526
  • Archival Resource Key: ark:/67531/metadc673306

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Creation Date

  • February 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 14, 2015, 6:21 p.m.

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Hawley, N. & Lesht, B.M. Suspended sediment transport in the benthic nepheloid layer in southeastern Lake Michigan, report, February 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc673306/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.