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Pesticide Spray Drift Conference September 5 and 6, 2001 AgDRIFT®

Pesticide Spray Drift Conference September 5 and 6, 2001 AgDRIFT® . Dave Esterly Environmental Focus, Inc Envfocus@home.com. A Really Fast Overview. Introduction AgDRIFT® Spray Drift Deposition Model.

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Pesticide Spray Drift Conference September 5 and 6, 2001 AgDRIFT®

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  1. Pesticide Spray Drift ConferenceSeptember 5 and 6, 2001AgDRIFT® Dave EsterlyEnvironmental Focus, IncEnvfocus@home.com

  2. A Really Fast Overview

  3. Introduction AgDRIFT® Spray Drift Deposition Model • AgDRIFT® incorporates a proposed overall method for evaluating off-site deposition of aerial, orchard or ground applied pesticides, and acts as a tool for evaluating the potential of buffer zones to protect sensitive aquatic and terrestrial habitats from undesired exposures.

  4. Program Overview • AgDRIFT® was developed under a cooperative Research and Development Agreement, CRADA, between the EPA, USDA, US Forest Service, and SDTF.

  5. Program Overview • AgDRIFT® is a modified version of AGDISP, a US Forest Service Model. Modifications include: • Took box to standardize calculations • Built-in graphics • Special export functions • Improved evaporation function • Emphasis drift to speed up the calculations

  6. AgDRIFT® Two Versions • Regulatory Version Two Extra Tiers: • Tier I Aerial • Tier II Aerial • Direct access to all the SDTF field studies

  7. Tier I Aerial

  8. AgDRIFT® Aerial Tier IRegulatory Risk Assessment • Screening Tool • “Reasonable Worst Case” Implies maximum acceptable Deposition Not Maximum expected Deposition

  9. Tier II Aerial

  10. AgDRIFT® Aerial Tier IIRegulatory Risk Assessment • Advanced Registration Tool • Designed for Label Mitigation • Selected Inputs can be Changed • Measurable • Controllable • Enforceable

  11. AgDRIFT® Two Versions • Public Version or Web Version • No access to the SDTF field data • No Tier I or Tier II Aerial • Defaults values “Typical Application Conditions” • Tier I & Tier II results can be recovered by using the Tier I default values. ( See manual )

  12. Agricultural Tier I – Ground (Empirical) Tier I –Orchard (Empirical) Tier III – Aerial (Physics Based) Forestry Tier III – Aerial (Physics Based) AgDRIFT® MAPWeb Version 2.03 Two Modes and Four Tiers

  13. AgDRIFT® Program Map

  14. AgDRIFT® Tier I Ground

  15. Tier I Ground • Boom Height • Low • high • Drop Size Distribution • FINE • MEDIUM / COARSE • Extended Settings • Number of swaths • Info • Field data summary

  16. AgDRIFT® Tier I Orchard

  17. Tier I Orchard • Combination Orchards • Normal • Dense • Sparse • Extended Setting • Info

  18. AgDRIFT® Tier III Aerial

  19. Tier III Aerial • Aircraft (72) • Nozzle & DSD • Transport • Swath • Spray Material • Meteorology • Terrain • Advance Settings

  20. Graphical Outputs Incremental Volume Fraction

  21. Graphical Outputs Cumulative Fraction

  22. Graphical Outputs Deposition

  23. Graphical Outputs Pond-Integrated Deposition

  24. Graphical Outputs Vertical Profile

  25. Vertical Profile • The total amount of mass (pesticide) passing in air at a given point down-wind as a function of height above the ground • Think of it as the drift before it deposits • Flux plane is set by the user • Units mg/cm2 • Mass is conserved

  26. Graphical Outputs 1 Hour Average Concentration

  27. 1 Hour Average Concentration • The total amount of mass (pesticide) passing in air at a given point down-wind as a function of height above the ground diluted with the volume of air the passes through the same point (area) in space • The volume of air is based on the wind speed • Units g/l

  28. Toolbox (Aquatic Assessment) • Water body • EPA Pond • EPA wetland • User Defined • Application Rate • Calculations • Buffer • Fraction of applied (rate) • Fraction • g/ha • Pond concentration g/l

  29. Toolbox (Terrestrial Assessment) • Terrestrial Field Deposition • Point • Average • Application Rate • Calculations • Buffer • Fraction of applied (rate) • Fraction • g/ha • g/cm2

  30. Toolbox (Spray Block Assessment) • Water body • EPA Pond • EPA wetland • User Defined • Application Rate • Calculations • Buffer • Fraction of applied (rate) • Fraction • g/ha • g/cm2

  31. Toolbox (Spray Block Assessment) Spray block assessment: Ask yourself the following question. If the area to be sprayed is 125ft from the sensitive area. How large of a area can I spray before I exceed a deposition of one percent of the application rate?

  32. Toolbox (Spray Block Assessment)

  33. Toolbox (Stream Assessment)

  34. Toolbox (Stream Assessment)

  35. Toolbox (Stream Assessment)

  36. Toolbox (Multiple Application Assessment)

  37. Toolbox (Multiple Application Assessment) Wind Rose

  38. Toolbox (Multiple Application Assessment)Deposition

  39. And Much More • HELP! The F1 key Short cut to the program help and definitions • Details!Read the Manual • Updates!Check the Web site: www.AgDRIFT.com

  40. AgDRIFT® Training • Date: To Be Established • Time: Session Length 1 or 2 Days • Place: Groups Choice • Cost: Cover Expenses • Contact SDTF: Dave, Dave, Dave, or Andrew

  41. Questions ?

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