Submitted to: Proceedings of American Chemical Society National Meeting
Publication Type: Abstract Only
Publication Acceptance Date: December 15, 2005
Publication Date: N/A
Technical Abstract: The Riparian Ecosystem Management Model REMM has been enhanced by the addition of pesticide process description algorithms. REMM simulates the daily flow of water, sediment, and agrochemicals through a 3-zone (horizontal) and 3-layer (vertical) plant/soil system which is designed to intercept and remediate agricultural water pollution in surface and subsurface flows as they leave fields and move toward streams. The model can provide information for the design and placement of such buffers as part of soil and water conservation programs, and has become an accepted tool for agricultural nutrient nonpoint pollution analyses. The new pesticide module includes algorithms for input of pesticides in runoff and subsurface flow, transport and degradation within the buffer compartments, sorption by soils as affected by solute ionization, temperature and soil moisture, and prediction of output loads. We have tested the model using data from field experiments at Tifton, GA in which attenuation of subsurface and surface transport of alachlor and atrazine in a 3-zone buffer was measured.