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(Article of periodic en Anglais - 2014)

Document title

Application date as a controlling factor of pesticide transfers to surface water during runoff events

Authors(s) and Affiliation(s)

BOITHIAS L. (1 2) ; SAUVAGE S. (1 2) ; SRINIVASAN R. (3) ; LECCIA O. (4) ; SÁNCHEZ-PÉREZ J.-M. (1 2) ;
(1) Univ. of Toulouse, INPT, UPS, Lab. Ecologie Fonctionnelle et Environnement (EcoLab), Castanet Tolosan, FRANCE
(2) CNRS, ECOLAB (Lab. Ecologie Fonctionnelle), Castanet Tolosan, FRANCE
(3) Spatial Sciences Lab., Texas A&M Univ., College Station, ETATS-UNIS
(4) Irstea, Adbx Research Unit, Gazinet-Cestas, FRANCE

Abstract

In agricultural watersheds, pesticide contamination in surface water mostly occurs during stormflow events. The AA. aimed to assess the sensitivity of the river network pesticide concentration patterns to application timing shifts within a plausible range of application dates, considering 2 pre-emergence herbicides (metolachlor and aclonifen) characterised by 2 different octanol/water partition coefficients. The Soil and Water Assessment Tool (SWAT) was applied in the agricultural watershed of the river Save (south-western France), where wheat, maize, sorghum and sunflower are intensively grown. The pesticide application date was changed within a one-month interval and the pesticide concentration at catchment outlet was simulated from March to June 2010. By testing the behaviour of the 2 molecules, it was shown that sorption processes were influencing the control of application timing on the transfer to surface water. At last, the study discusses the potential implications of the sensitivity in terms of regional agricultural management practice design

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2014, no119 [pp. 97-103]

Bibliographic references : 1 p.

Collation : 2 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.03.013

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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