Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/23/2012
Publication Date: 8/10/2012
Citation: Bialek Kalinski, K.M., Rice, C., Mccarty, G.W. 2012. Herbicide washoff from forest canopy through fall depends on rainfall dynamics. American Chemical Society Abstracts. 75:110. Interpretive Summary: .
Technical Abstract: Fate of herbicides, atrazine and metolachlor, released to the atmosphere and deposited in rain was studied following their field application in a small agricultural watershed located in Maryland. We monitored delivery of herbicides in the rain in both open and closed canopy areas of a forested riparian buffer at different distances from the field. We observed a direct linear relationship between precipitation amounts and decreases in the volume of rain collected under a tree canopy, as compared to the volume of rain collected in the tree-free areas. For the lowest range precipitation, the rain volume collected under the tree canopy was around 60% of the rain collected in the open area. However, for precipitations above 30mm, it was around 90%. We utilized established relationship to calculate atmospheric deposition of herbicides to the riparian buffer during the rain based on monitored precipitation and herbicides analyses of the rain.