The GDS model - a rapid computational technique for the calculation of aircraft spray drift buffer distances
Article
Article Title | The GDS model - a rapid computational technique for the calculation of aircraft spray drift buffer distances |
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ERA Journal ID | 41630 |
Article Category | Article |
Authors | |
Author | Craig, Ian |
Journal Title | Computers and Electronics in Agriculture |
Journal Citation | 43 (3), pp. 235-250 |
Number of Pages | 16 |
Year | 2004 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0168-1699 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compag.2004.02.001 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0168169904000328 |
Abstract | [Abstract]: A model for predicting the required spray drift buffer distance for a specified off target deposition level is described. The GDS model is based upon Gaussian diffusion and sedimentation of particles originating from an elevated instantaneous line source. Aircraft-induced near wake effects are ignored. Agreement between aircraft wake models FSCBG, AgDRIFT and the GDS model is reasonable for downwind distances greater than 50m. The model has the advantage over Lagrangian models in that it is faster computationally and can readily provide real time prediction in the cockpit over large distances (3 km). A sensitivity analysis has been performed on the model to elucidate the effects of the primary parameters on spray drift. The model has proved useful in the determination of spray drift buffer distances for regulatory purposes and in the development of appropriate spray drift management systems for aerial spraying. Further research work is required to refine the model to better account for air stability effects, collector type, evaporation and crop canopy. |
Keywords | spray drift, Gaussian diffusion, sedimentation, buffer distance |
ANZSRC Field of Research 2020 | 401199. Environmental engineering not elsewhere classified |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Department of Agricultural, Civil and Environmental Engineering |
https://research.usq.edu.au/item/9xwq7/the-gds-model-a-rapid-computational-technique-for-the-calculation-of-aircraft-spray-drift-buffer-distances
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