[Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Wei Mao

[eoas-seminar at lists.fsu.edu]

"Quantifying Pesticide Fate and Transport in South Florida Agriculture Areas"

Wei Mao
Postdoctoral Researcher,
Department of Earth, Ocean, and Atmospheric Science (EOAS),
Florida State University (FSU)

Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic. All are welcome to attend.

NOTE: In-person attendance is requested in our 499 Dirac Science Library (DSL) Seminar Room. Zoom access is intended for external (non-departmental) participants only.

https://fsu.zoom.us/j/94273595552
Meeting # 942 7359 5552

🎦 Colloquium recordings will be made available here, https://www.sc.fsu.edu/colloquium<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sc.fsu.edu%2Fcolloquium&data=05%7C02%7Csc-seminar-announce%40lists.fsu.edu%7C3b7b858c36e14d9dec8d08ddf9d1a8d8%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638941401058305266%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=ac6ViovcIluEdHD%2F38z%2FHM6qixkEi6OmI6ou2cyu9kg%3D&reserved=0>

Wednesday, Sep 24, 2025, Schedule:

* 3:00 to 3:30 PM Eastern Time (US and Canada)
☕ Nespresso & Teatime - 417 DSL Commons

* 3:30 to 4:30 PM Eastern Time (US and Canada)
🕟 Colloquium - 499 DSL Seminar Room

Abstract:
Agriculture is a cornerstone of Florida’s economy, particularly in South Florida. However, intensive farming practices are closely tied to heavy pesticide use, raising concerns about water quality. Chlorothalonil, a broad-spectrum fungicide widely applied in the region, has an uncertain environmental fate and transport behavior. In particular, the key processes and parameters governing its movement and transformation in natural systems remain poorly understood.

In this study, we applied the U.S. EPA’s Pesticide in Water Calculator (PWC) to simulate the transport of chlorothalonil and its major transformation product from land surface to shallow groundwater and adjacent drainage ditch. The model accounts for precipitation–runoff, erosion, crop growth, evapotranspiration, soil water movement, and pesticide degradation in soil, surface water and sediment. We calibrated the hydrological module against field data collected in South Florida during spring 2025, achieving satisfactory model performance. Scenario analyses of pesticide applications were then conducted to evaluate pesticide fate under different management conditions. To further address the complexity of reactive transport in natural systems, we are developing a Bayesian network–based global sensitivity framework.

Overall, this research provides quantitative insights into contamination risks to local water resources and advances our understanding of the environmental drivers and transport mechanisms in this vulnerable agricultural region.

Additional colloquium details can be found here,
https://www.sc.fsu.edu/news-and-events/colloquium/1881-colloquium-with-wei-mao-2025-09-24<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sc.fsu.edu%2Fnews-and-events%2Fcolloquium%2F1881-colloquium-with-wei-mao-2025-09-24&data=05%7C02%7Csc-seminar-announce%40lists.fsu.edu%7C3b7b858c36e14d9dec8d08ddf9d1a8d8%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638941401058331585%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=9P%2BJG4SQdByATrAup55K2E4m7hog0kn5H2cfN0xyILs%3D&reserved=0>
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