Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 507772
Title Modelling exposure of workers, residents and bystanders to vapour of plant protection products after application to crops
Author(s) Berg, F. van den; Jacobs, C.M.J.; Butler Ellis, M.C.; Spanoghe, P.; Doan Ngoc, K.; Fragkoulis, G.
Source Science of the Total Environment 573 (2016). - ISSN 0048-9697 - p. 1010 - 1020.
DOI http://dx.doi.org/10.1016/j.scitotenv.2016.08.180
Department(s) Alterra - Environmental risk assessment
Alterra - Climate change and adaptive land and water management
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Modelling - OPS - PEARL - Pesticide volatilisation - Scenario development - Vapour exposure
Abstract

Agricultural use of plant protection products can result in exposure of bystanders, residents, operators and workers. Within the European Union (EU) FP7 project BROWSE, a tool based on a set of models and scenarios has been developed, aiming to assess the risk of exposure of humans to these products. In the present version of the tool only a first conservative tier is available for outdoor vapour exposure assessment. In the vapour exposure evaluation, the target concentrations in air at 10 m distance from the edge of a treated field are calculated for specific scenarios for each EU regulatory zone. These scenarios have been selected to represent reasonable worst case volatilisation conditions. The exposure assessment is based on a series of weekly applications in a five year period to cover a wide range of meteorological conditions. The volatilisation from the crop is calculated using the PEARL model and this PEARL output provides the emission strength used as input for the short term version of the atmospheric transport model OPS. The combined PEARL-OPS model is tested against measurements from a field experiment. First results of this test show that the mean concentration level was predicted fairly well. However, sometimes the differences between observations and simulations were found to be substantial. Improvements are suggested for the vapour exposure scenarios as well as for further model development. In the current version of the BROWSE tool a simplified procedure is used to assess single and multiple applications. The actual period of application and the time of application during the day are fixed, and the growth stage of the crop cannot be taken into account. Moreover, competing processes such as penetration of the substance into the plant tissue are not considered. The effect of these factors on the target exposure concentrations is discussed.

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