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Title: HERBICIDE ABATEMENT BY A RIPARIAN WETLAND SYSTEM

Author
item Rice, Clifford
item Bialek Kalinski, Krystyna
item McCarty, Gregory
item ANGIER, JONATHAN - USEPA
item Hively, Wells - Dean

Submitted to: Society of Environmental Toxicology and Chemistry (SETAC)
Publication Type: Abstract Only
Publication Acceptance Date: 7/16/2005
Publication Date: 11/16/2005
Citation: Rice, C., Bialek Kalinski, K.M., Mccarty, G.W., Angier, J., Hively, W.D. 2005. Herbicide abatement by a riparian wetland system [abstract]. Society of Environmental Toxicology and Chemistry Abstracts. p. 145.

Interpretive Summary: .

Technical Abstract: Riparian buffers are touted for their ability to remove agricultural contaminants; however, little is known about the specific processes that function to arrest pesticide movement and transport. Five years of data have been gathered on the movement and fate of atrazine and metolachlor into a riparian wetland that borders an active cornfield in Maryland. Base-flow conditions in the first-order stream connected to this system are entirely groundwater fed. This results in relatively high stream concentrations of certain metabolites of the herbicides, especially metolachlor ethane sulfonic acid. Data will be presented on the relative concentrations of herbicides and their metabolites in the various compartments of the riparian buffer to provide better understanding of contaminant movement and fate in this first-order riparian ecosystem.