FIELD STUDY OF THE INFLUENCES OF ROADSIDE TREES AND MOVING AUTOMOBILES ON TURBULENT DIFFUSION OF AIR POLLUTANTS AND THERMAL ENVIRONMENT IN URBAN STREET CANYONS

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Kikuchi, A.; Nataya, N.; Mochida, A.; Yoshino, H.; Tabata, Y.; Watanabe, H.; Jyunimura, Y.
Street Canyon, Roadside Tree, Pollutant Diffusion, Automobile, field measurement
Year:
2007
Bibliographic info:
The 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings IAQVEC 2007, Oct. 28 - 31 2007, Sendai, Japan

This study aims to investigate and clarify the effects of roadside trees and moving automobiles onoutdoor airflow distribution, turbulent diffusion of air pollutants and thermal environment within streetcanyons by means of the results obtained from field measurements in the central part of Sendai city,Japan. The detailed field measurements were carried out in the summer of 2006, at two streets withdifferent densities of roadside trees and traffic volume. The microclimate and NOX concentrations as wellas traffic volume were measured. The effects of the density of roadside trees and the complexinteractions of roadside trees were investigated by comparing the results measured at the said twostreets. The results clearly showed that thermal environment has been improved but NOX concentrationalso increased simultaneously.

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