Middlebury

 

Presentation Title: Summertime Hydrodynamics and Sediment Dynamics in Missisquoi Bay, Lake Champlain

Section: Changing Environments IV

Location: , 220

Date & Time: Friday, April 19, 2013 - 4:10pm - 4:25pm

Abstract:

The relationship between circulation currents, suspended sediment concentration, and sedimentation rates were investigated as part of a larger 5-year project studying the causes of eutrophication in Missisquoi Bay, a shallow bay (4 m) in Lake Champlain. Two months of currents, wind forcing, and water level variations at five sites were examined to understand sediment resuspension and deposition. North-south and east-west centimeter-scale diurnal oscillations of lake level were observed and were not linked to the calculated ~30 minute surface seiche. Currents obtained from Acoustic Doppler Current Profilers (ADCPs) indicate that after consistent wind forcing, both cyclonic and anticyclonic circulation patterns were established. Unique to this very shallow bay was the degree of directional shear as high as 180 degrees. Sediment properties, magnetic susceptibility measurements, and sedimentation rates indicate that sediment accumulation rates are not constant throughout the bay. Implications of these results will provide insight into how phosphorus and nitrogen are being moved throughout the bay. 

Type of Presentation: Individual oral

Oral presenters
Presentation Area: Geology

Presentation Topic: Environment

Arts presenters
Format: 

Class Project
Course name: 
Course Instructor: 
Number of presenters: 

Presenter Information
Presenter(s): Wei, Emily Ann-Yi
Major(s): Geology
Class Year(s): 2013

Sponsor(s): Manley, Tom, Manley, Pat
Dept(s): Geology

Moderator: ,