Skip to Main content Skip to Navigation
Theses

Modélisation du devenir des pesticides dans les sols à partir d'un modèle agronomique : évaluation sur le long terme

Abstract : A pesticide fate module was implemented in the crop model STICS (SimulateurmulTIdisciplinaire pour les Cultures Standard) in order to simulate pesticidetransfer in agricultural soils. Then the model has been evaluated with three studysites datasets. In order to study the fate of pesticides at the scale of the Orgeval catchment, simulations of four herbicides (atrazine, simazine,isoproturon chlortoluron) and one metabolite (DEA) were carriedout with the crop model STICS over a 23-year period (1990-2012). The objectives of the study were i) to highlight the main processes implied in pesticide fate and transfer at long-term; ii) to assess the influence of the dynamics of the remaining mass of pesticide in soil on transfer; iii) to determine the most sensitive parameters related to pesticide losses by leaching over a 23-year period.Simulations were compared against available observations at the catchment scale. The findings of the study show that the dynamic of the remaining mass ofpesticide in soil is a relevant issue to understand pesticide dissipation at longterm. Attention must be paid on parameters influencing sorption and availabilityof the pesticide for leaching. To conclude, the significant discrepancies in the simulated pesticide leaching for the two types of crops (maize and wheat) highlight the interest of using a crop model to simulate the fate of pesticides at the catchment scale.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01423856
Contributor : Abes Star :  Contact
Submitted on : Tuesday, July 4, 2017 - 12:10:54 PM
Last modification on : Friday, November 20, 2020 - 2:44:02 PM
Long-term archiving on: : Thursday, December 14, 2017 - 2:57:23 PM

File

2014PA066566.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01423856, version 1

Citation

Wilfried Queyrel. Modélisation du devenir des pesticides dans les sols à partir d'un modèle agronomique : évaluation sur le long terme. Sciences agricoles. Université Pierre et Marie Curie - Paris VI, 2014. Français. ⟨NNT : 2014PA066566⟩. ⟨tel-01423856⟩

Share

Metrics

Record views

647

Files downloads

804