Modeling aerially applied sprays: An update to AGDISP model development

Authors: TESKE, MILTON - Continuum Dynamics Inc; THISTLE, HAROLD - Forest Service (FS); Fritz, Bradley - Brad

Submitted to: Transactions of the ASABE
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/31/2018
Publication Date: 1/31/2019
Citation: Teske, M., Thistle, H., Fritz, B.K. 2019. Modeling aerially applied sprays: An update to AGDISP model development. Transactions of the ASABE. 62(2):343-354. https://doi.org/10.13031/trans.13129.
DOI: https://doi.org/10.13031/trans.13129

Interpretive Summary: The AGricultural DISPersal model, commonly known as AGDISP, allows for the mathematical modeling of the fate and transport of agricultural sprays applied by aerial and ground boom spray systems. It is a tool that industry, research and regulatory organizations heavily rely on in understanding and monitoring the impact from agrochemical applications. This work updates recent developments of the model and outlines additional model features. Through extensive comparisons of the updated model with the Spray Drift Task Force aerial database, the updates and additional feature were shown to further enhance the models validity. AGDISP provides an extensive user base with a simple-to-use numerical tool to estimate spray drift and assess deposition effects from spray aircraft.

Technical Abstract: This article updates the further development of the Lagrangian-based computer model AGDISP (AGricultural DISPersal). Additional model features are described, along with model comparisons with the extensive Spray Drift Task Force (SDTF) aerial database. AGDISP provides the US Department of Agriculture Forest Service (FS), its cooperators, other agencies including the US Environmental Protection Agency (USEPA), and its extensive user base with a simple-to-use numerical tool to estimate spray drift and assess deposition effects from spray aircraft.