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Accueil > Équipes > Transferts Réactifs dans les Hydrosystèmes Anthropisés - TReHa > Résultats scientifiques de l’équipe TreHa

Hydrological modeling of contaminant transfer within agricultural catchments and associated wetland

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Research question
Modelling the impact of hydrological behaviour on contaminant transfer within the agricultural catchment and associated wetlands.

Approach
Our approach consists in field- and lab-based experimental studies and integrates hydrological, analytical, mineralogical, isotope and microbial methods and techniques to better understand the reactive transfer of contaminant in complex and dynamic environmental systems.

Main results
The developed models can reproduce the hydrological dynamics of the system “Agricultural catchment - artificial wetland linked”. In addition these models can be used to evaluate how flood protection and mitigation objectives can be combined in artificial wetlands. Present studies focus on the modelling of transfer of chloroacetamide herbicides from the fields to the artificial wetlands.

Illustration of the integration of various scales for studying the hydrological impact on contaminant transfer : modeling the impact of within-storm variability on runoff-related pesticide transport at the plot scale without soprtion (R1), for moderetley sorbed pesticide (R5) and strongly sorbed (R25) (on the left, collaboration with Christoph Hinz, University of Western Australia) and modelling of hydrological connectivity within a vineyard catchment (on the right, collaboration with Vicotr Jetten, University of Twente, The Netherlands)

Perspectives
Coupling the fate of contaminants with hydrological models developped at the scales of the agricultural catchments and artificial wetlands. Developping a tracer toolbox to improve the understanding of the contaminants flowpaths within these systems and better calibrate and validate the distributed hydrological models.

Persons involved
S. Payraudeau (MdC ENGEES), C. Grégoire (IDEA ENGEES), C. Regazzoni (Chargé de Mission, National program ENRHY (2010-2012), ONEMA (National Office of Water and Aquatic System) (Modeling the hydrological behavior of agricultural catchments and artificial wetland)), M. Lefrancq (PhD student, European project INTERREG IV PhytoRET (2011-2014), grant Agence de l’Eau (Modeling the transport pf pesticides to surface water at the catchment scale)).

Références bibliographiques
Payraudeau S., McGrath G., Hinz C. (2011). Climate and contaminant transport : the role of within-storm variability on contaminant transport by surface runoff. In Current Trends and Expected Climate Change Impact, edited by N. Peters, V. Krysanova, A. Lepistö, R. Prasad, M. Thoms, R. Wilby, S. Zandaryaa, AHS Publ. n° 348, pp 32-37.
Leviandier L., Madier S., Payraudeau S. (2011). Sampling strategies based on sets of behavioural parameters. Application to a simple pesticide fate model. Stochastic Environmental Research & Risk Assessment. On line.
Payraudeau S., Grégoire C. (2011). Modeling pesticides transfer to surface water at the catchment scale : a multi-criteria analysis. Agronomy for Sustainable Development. On line.
Grégoire C., Payraudeau S., Domange N. (2010). Use and fate of 17 pesticides at the catchment scale. International Journal of Environmental Analytical Chemistry. Vol 90 n°3-6, 406-420 pp.
Laurain V., Gilson M., Payraudeau S., Grégoire C., Garnier H. (2010). A new data-based modelling method for identifying parsimonious nonlinear rainfall/flow models. International Environmental Modelling and Software Society (iEMSs) 2010 International Congress on Environmental Modelling and Software Modelling for Environment’s Sake, Fifth Biennial Meeting, Ottawa, Canada, 8 pages.
Payraudeau S., Junker P., Imfeld G. and Gregoire C., 2009. Characterizing hydrological connectivity to identify critical source areas for pesticides losses. In B. Anderssen et al. (eds) /18th IMACS World Congress - MODSIM09 International Congress on Modelling and Simulation. ISBN : 978-0-9758400-7-8., pp. 74-80.