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Does Vegetation Help Mitigate Roadway and Aircraft-Related Air Pollution in Seattle?

urban roadways from above

A Community-Engaged Study Using Drones For 3D Air Quality Measurements

Recent UW research that has identified high concentrations of ultrafine particle air pollution in some Seattle/King County communities has created an urgent need to evaluate the potential efficacy of community-scale air pollution mitigations, including the role that vegetation may play in reducing air pollution. Few studies have considered how trees and shrubs affect ultrafine air pollution, and most have focused on reductions in particles in the horizontal direction to the side of freeways from roadway traffic particle sources, rather than the distributions of particles in vertical and horizontal directions relevant to both roadway and aircraft-sourced particles. We have formed an interdisciplinary team of UW investigators, which includes expertise from Environmental & Occupational Health Sciences, Civil and Environmental Engineering, and Atmospheric Sciences to tackle this challenge and to fill this important knowledge gap for our local communities.  

In partnership with various air quality, health, and community stakeholders, we propose to conduct a study that will utilize an unoccupied aerial vehicle (UAV)  – a drone instrumented with high-end air quality sensors, which will allow for efficient measurements at varying altitudes at sites identified by our partners that differ in vegetation density and type and proximity to ultrafine particle sources. Findings from this study will provide local and highly relevant evidence on the effectiveness of urban planning initiatives that may utilize greenery as an approach to address particulate air pollution. Additionally, the results would potentially inform future intervention studies that monitor air pollution changes that occur as a result of planting vegetation, which are starting to occur in cities across the country.

Research Team:

students and teacher work on a drone togetherPrincipal Investigator: Edmund Seto, UW Department of Environmental and Occupational Health Sciences
Community Partner: Estela Ortega, El Centro de la Raza
Timothy Larson, UW Civil & Environmental Engineering
David Shean, UW Civil & Environmental Engineering
Joel Thornton, UW Department of Atmospheric Sciences