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Title: Numerical modeling of mixed sediment resuspension, transport, and deposition during the March 1998 episodic events in southern Lake Michigan.

Abstract

A two-dimensional sediment transport model capable of simulating sediment resuspension of mixed (cohesive plus noncohesive) sediment is developed and applied to quantitatively simulate the March 1998 resuspension events in southern Lake Michigan. Some characteristics of the model are the capability to incorporate several floc size classes, a physically based settling velocity formula, bed armoring, and sediment availability limitation. Important resuspension parameters were estimated from field and laboratory measurement data. The model reproduced the resuspension plume (observed by the SeaWIFS satellite and field instruments) and recently measured sedimentation rate distribution (using radiotracer techniques) fairly well. Model results were verified with field measurements of suspended sediment concentration and settling flux (by ADCPs and sediment traps). Both wave conditions and sediment bed properties (critical shear stress, fine sediment fraction, and limited sediment availability or source) are the critical factors that determine the concentration distribution and width of the resuspension plume. The modeled sedimentation pattern shows preferential accumulation of sediment on the eastern side of the lake, which agrees with the observed sedimentation pattern despite a predominance of particle sources from the western shoreline. The main physical mechanisms determining the sedimentation pattern are (1) the two counter-rotating circulation gyres producing offshore mass transport alongmore » the southeastern coast during northerly wind and (2) the settling velocity of sediment flocs which controls the deposition location.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); NOAA
OSTI Identifier:
914964
Report Number(s):
ANL/OTD-AST/JA-58717
Journal ID: ISSN 0148-0227; JGREA2; TRN: US200817%%38
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Geophys. Res.; Journal Volume: 112; Journal Issue: C02018 ; Feb. 17, 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
54 ENVIRONMENTAL SCIENCES; LAKE MICHIGAN; SEDIMENTS; PARTICLE RESUSPENSION; ENVIRONMENTAL TRANSPORT; DEPOSITION; FLOW MODELS; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Lee, C., Schwab, D. J., Beletsky, D., Stroud, J., Lesht, B., PNNL, NOAA, Univ. of Michigan, and Univ. of Pennsylvania. Numerical modeling of mixed sediment resuspension, transport, and deposition during the March 1998 episodic events in southern Lake Michigan.. United States: N. p., 2007. Web. doi:10.1029/2005JC003419.
Lee, C., Schwab, D. J., Beletsky, D., Stroud, J., Lesht, B., PNNL, NOAA, Univ. of Michigan, & Univ. of Pennsylvania. Numerical modeling of mixed sediment resuspension, transport, and deposition during the March 1998 episodic events in southern Lake Michigan.. United States. doi:10.1029/2005JC003419.
Lee, C., Schwab, D. J., Beletsky, D., Stroud, J., Lesht, B., PNNL, NOAA, Univ. of Michigan, and Univ. of Pennsylvania. Sat . "Numerical modeling of mixed sediment resuspension, transport, and deposition during the March 1998 episodic events in southern Lake Michigan.". United States. doi:10.1029/2005JC003419.
@article{osti_914964,
title = {Numerical modeling of mixed sediment resuspension, transport, and deposition during the March 1998 episodic events in southern Lake Michigan.},
author = {Lee, C. and Schwab, D. J. and Beletsky, D. and Stroud, J. and Lesht, B. and PNNL and NOAA and Univ. of Michigan and Univ. of Pennsylvania},
abstractNote = {A two-dimensional sediment transport model capable of simulating sediment resuspension of mixed (cohesive plus noncohesive) sediment is developed and applied to quantitatively simulate the March 1998 resuspension events in southern Lake Michigan. Some characteristics of the model are the capability to incorporate several floc size classes, a physically based settling velocity formula, bed armoring, and sediment availability limitation. Important resuspension parameters were estimated from field and laboratory measurement data. The model reproduced the resuspension plume (observed by the SeaWIFS satellite and field instruments) and recently measured sedimentation rate distribution (using radiotracer techniques) fairly well. Model results were verified with field measurements of suspended sediment concentration and settling flux (by ADCPs and sediment traps). Both wave conditions and sediment bed properties (critical shear stress, fine sediment fraction, and limited sediment availability or source) are the critical factors that determine the concentration distribution and width of the resuspension plume. The modeled sedimentation pattern shows preferential accumulation of sediment on the eastern side of the lake, which agrees with the observed sedimentation pattern despite a predominance of particle sources from the western shoreline. The main physical mechanisms determining the sedimentation pattern are (1) the two counter-rotating circulation gyres producing offshore mass transport along the southeastern coast during northerly wind and (2) the settling velocity of sediment flocs which controls the deposition location.},
doi = {10.1029/2005JC003419},
journal = {J. Geophys. Res.},
number = C02018 ; Feb. 17, 2007,
volume = 112,
place = {United States},
year = {Sat Feb 17 00:00:00 EST 2007},
month = {Sat Feb 17 00:00:00 EST 2007}
}