Water Luncheon Seminar
Hidden Chemical Exchange Due to Lake-Groundwater Interactions
Dr. Audrey Sawyer, Assistant Professor, The Ohio State University
WHEN: April 19, 2017; 11:30 am – 1:00 pm
WHERE: Wilma H. Schiermeier Olentangy River Wetland Research Park, Heffner Building, Columbus, OH (map)
Water and chemical exchange through lakebed sediment affects lake water quality but often eludes measurement because fluxes are highly variable and broadly distributed. Here, I present two examples of the effects of lake-groundwater interaction on lake water quality. In the first case, direct groundwater discharge to Lake Erie acts as a hidden source of dissolved nutrients that may alter N:P ratios in lake water and contribute to algal blooms. Based on geospatial analysis, Lake Erie is particularly vulnerable to groundwater-borne nutrient loading compared to the other Great Lakes…..