Klump, J. Val. University of Wisconsin-Milwaukee,, firstname.lastname@example.org
Waples, J. T. University of Wisconsin-Milwaukee,, email@example.com
Edgington, D. N. University of Wisconsin-Milwaukee, firstname.lastname@example.org
Mackenzie, R. A. University of Wisconsin-Milwaukee, email@example.com
Szmania, D. C. University of Wisconsin-Milwaukee, firstname.lastname@example.org
Lovalvo, D. Eastern Oceanics Inc., email@example.com
Eadie, B. J. NOAA Great Lakes Environmental Research Lab, firstname.lastname@example.org
Orlandini, K. Argonne National Laboratory,
Robbins, R. A. NOAA Great Lakes Environmental Research Lab, email@example.com
VISUAL RECONNAISSANCE OF THE BOTTOM AND AN ASSESSMENT OF THE RESUSPENDIBLE POOL OF SEDIMENTS WITHIN THE NEARSHORE ZONE OF SOUTHERN LAKE MICHIGAN.
The nearshore zone (< 40 meters depth) within southern Lake Michigan is characterized by a diverse array of bottom types from cobble and boulder fields, to sand and gravel bottoms, to hard clay banks. Despite a lack of permanently accumulating sediments within most of this region, it is an area of intense and episodic sediment resuspension. It is hypothesized that the nearshore bottom serves as a temporary repository for sediments entering the lake and that this resuspension initiates both alongshore and shore normal transport of fine grained particles. Techniques are being developed to quantitatively measure the inventories of sediments and radionuclides (Th-234, Pb-210 and Cs-137) temporarily residing in this transient particle pool. Changing inventories may provide information on the frequency and duration of resuspension, on the residence time of particles in the nearshore benthic system, and on the cross margin transport of particulate materials to zones of permanent deposition and burial. ROV based observations have also revealed that much of the nearshore area has become colonized by very abundant populations of the zebra mussel (Driessenia polymorpha), an efficient particle filter feeder. Their impact on particle dynamics in the nearshore would appear to be significant.
Day: Thursday, Feb. 4
Location: Sweeney Center