Articles | Volume 29, issue 22
https://doi.org/10.5194/hess-29-6703-2025
https://doi.org/10.5194/hess-29-6703-2025
Technical note
 | 
25 Nov 2025
Technical note |  | 25 Nov 2025

Technical note: Extending the SWAT2012 and SWAT+ models to simulate pesticide plant uptake processes

Hendrik Rathjens, Jens Kiesel, Jeffrey Arnold, Gerald Reinken, and Robin Sur

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Technical note: Extending the SWAT model to transport chemicals through tile and groundwater flow
Hendrik Rathjens, Jens Kiesel, Michael Winchell, Jeffrey Arnold, and Robin Sur
Hydrol. Earth Syst. Sci., 27, 159–167, https://doi.org/10.5194/hess-27-159-2023,https://doi.org/10.5194/hess-27-159-2023, 2023
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Cited articles

Arnold, J. G., Srinivasan, R., Muttiah, R. S., and Williams, J. R.: Large-area hydrologic modeling and assessment: part I. model development, Am. Wat. Res., 34, 73–89, 1998. 
Arnold, J.G., Rathjens, H., and Kiesel, J.: SWAT source code including pesticide plant update routines [Code], https://github.com/StoneEnv/SwatPestPlantUptake (last access: 18 November 2025), 2023 
Bouraoui, F.: Testing the PEARL model in the Netherlands and Sweden, Environmental Modelling & Software, 22, 937–950, https://doi.org/10.1016/j.envsoft.2006.06.004, 2007. 
Bieger, K., Arnold, J. G., Rathjens, H., White, M. J., Bosch, D. D., Allen, P. M., Volk, M., and Srinivasan, R.: Introduction to SWAT+, a Completely Restructured Version of the Soil and Water Assessment Tool, Journal of the American Water Resources Association (JAWRA), 53, 115–130, https://doi.org/10.1111/1752-1688.12482, 2017. 
Carsel, R. F., Mulkey, L. A., Lorber, M. N., and Baskin, L. B.: The Pesticide Root Zone Model (PRZM): A procedure for evaluating pesticide leaching threats to groundwater, Ecological Modelling 30, 49–69, 1985. 
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Short summary
We improved the widely used SWAT (Soil and Water Assessment Tool) model to better predict how pesticides move through the environment. We added a new process that considers how plants take-up chemicals from the soil. Testing this updated model in two catchments showed very good prediction capabilities and a reduction of chemicals in river water by up to 17 % due to the plant uptake. The enhanced model offers a valuable tool for assessing the environmental impacts of agricultural management.
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