Effectiveness of vegetation and sound wall-vegetation combination barriers on pollution dispersion from freeways under early morning conditions
| Autor: | Isis Frausto-Vicencio, Dilhara Ranasinghe, Eon S. Lee, Wu Sun, U. Seibt, Suzanne E. Paulson, Yifang Zhu, Steve Mara, Wonsik Choi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Pollution
Conservation of Natural Resources Environmental Engineering 010504 meteorology & atmospheric sciences media_common.quotation_subject Air pollution Sound wall Wind 010501 environmental sciences Atmospheric sciences medicine.disease_cause 01 natural sciences Article California Wind speed Sustainable Cities and Communities Air Pollution medicine Atmospheric instability Environmental Chemistry Particle Size Waste Management and Disposal Vehicle Emissions 0105 earth and related environmental sciences media_common Particle deposition Pollutant Air Pollutants Pollution dispersion Vegetation Atmospheric dispersion modeling Plume Ultrafine particles Vegetation barrier Combination barrier Environmental science Particulate Matter Environmental Sciences Environmental Monitoring |
| Zdroj: | Science of The Total Environment. 658:1549-1558 |
| ISSN: | 0048-9697 |
| Popis: | Pollutants in tailpipe emissions can be highly elevated around roadways, and in early mornings the pollution plume can extend hundreds of meters into surrounding neighborhoods. Solid sound walls and vegetation barriers are commonly used to mitigate noise, but they also help mitigate near-road air pollution. Here we assess the effectiveness of barriers consisting of vegetation only and of a combination of vegetation and a solid sound wall (combination barrier) in reducing pollution concentrations downwind of roads, under stable atmospheric stability and calm to light wind conditions. Because there was no practical (no barrier) control site in the area, we primarily compare the two barrier types to each other and explore the importance of atmospheric conditions. Using measurements collected with a mobile platform, we develop concentration decay profiles of ultrafine and fine particles, oxides of nitrogen (NO and NO2) and carbon monoxide downwind of a freeway in California with different barrier configurations and meteorological conditions. Diurnally averaged data collected with passive samplers indicate that pollution from morning rush hour has about equal impact as the entire remainder of the day, because of differences in atmospheric dispersion as the day progresses. Under calm and stable atmospheric conditions (wind speed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect