Skip to Main content Skip to Navigation
Theses

Pollution de l'eau par les pesticides en milieu viticole languedocien. Construction d'un modèle couplé pression-impact pour l'expérimentation virtuelle de pratiques culturales à l'échelle de petits bassins versants

Abstract : In Mediterranean catchments in which vineyards account for a major share of the area, cropping practices are an important factor with respect to increasing risks of diffuse pesticide pollution of water. This study was about developping an approach for pressure-impact modelling. The research question considered dynamics of agrosystem status variables modified by cropping actions. Two variables were identified : soil surface infiltrability and active material concentration on the soil. On a catchment scale, to assess impacts, we used the distributed hydrological model MHYDAS to simulate water and pollutant flows according to different cropping practice and climatic scenarios. To represent the spatiotemporal distribution of cropping operations on each plot, the decision model DHIVINE was built. It simulates vinegrowers's crop management sequences. For each farm in the catchment, the model is based on a representation of the vineyard annual technical management strategy in the form of activity plans. These plans involve agrosystem status indicators and take into account the characteristics of productive resources on the farm and arbitration between cultivation operations and competing plots. Biophysical models were developped to simulate decision indicators and impacts of cropping practices on soil surface characteristics which are drivers of soil surface infiltrability. A functional typology of soil surface states based on their soil infiltrabilty properties was used to develop an approach for temporally continuous modelling of infiltration. It was based on a parallel modelling of dynamics (i) of soil surface characteristics of bare soil and (ii) of weed cover development. Model coupling was realized with OpenFLUID platform. The approach developped herein allows simulating dynamics of agrosystem status variables as a function of cropping practices. It seems adapted for assessing hydrological impacts at the catchment scale in Mediterranean environments.
Complete list of metadata

Cited literature [301 references]  Display  Hide  Download

https://hal.inrae.fr/tel-02810991
Contributor : Migration Prodinra <>
Submitted on : Saturday, June 6, 2020 - 9:10:48 AM
Last modification on : Wednesday, November 11, 2020 - 7:42:03 PM

File

Publis011-lisah-026_Pare_thès...
Files produced by the author(s)

Identifiers

  • HAL Id : tel-02810991, version 1
  • PRODINRA : 222687

Citation

Nakié Paré. Pollution de l'eau par les pesticides en milieu viticole languedocien. Construction d'un modèle couplé pression-impact pour l'expérimentation virtuelle de pratiques culturales à l'échelle de petits bassins versants. Milieux et Changements globaux. Institut National d'Etudes Supérieures Agronomiques de Montpellier, 2011. Français. ⟨tel-02810991⟩

Share

Metrics

Record views

169

Files downloads

336