| Issue |
E3S Web Conf.
Volume 716, 2026
The 12th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings (IAQVEC 2026)
|
|
|---|---|---|
| Article Number | 05014 | |
| Number of page(s) | 7 | |
| Section | Health, Wellbeing, and Human Behaviors in the Built Environment | |
| DOI | https://doi.org/10.1051/e3sconf/202671605014 | |
| Published online | 09 June 2026 | |
Investigation of Legionella Transmission Using CFD Simulation Coupled with GIS
1 Division of Human Environmental Systems, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
2 Division of Architecture, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
Abstract. In the summer of 2023, a Legionnaires' disease outbreak occurred in Miyagi Prefecture, with a cooling tower identified as the source. Legionella bacteria were detected in the cooling tower at 680,000 CFU/mL (standard value: 1 CFU/mL), and 23 infections were reported within a 3 km radius. In this study, meteorological data from the specific period and GIS information of Osaki City were integrated into CFD modeling to calculate the distribution of Legionella within a 5 km radius of the source. Furthermore, a quantitative risk analysis was conducted, accounting for removal effects such as humidity and UV radiation during airborne transmission.
Key words: CFD / Legionella bacteria / meteorological data / UV light inactivation
© The Authors, published by EDP Sciences, 2026
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